Researchers at the RIKEN Center for Emergent Matter Science (CEMS) and the RIKEN Cluster for Pioneering Research (CPR) in Japan have developed a technique to improve the flexibility of ultra-thin electronics, such as those used in bendable devices or clothing. Published in Science Advances, the study details the use of water vapor plasma to directly bond gold electrodes fixed onto separate ultra-thin polymer films, without needing adhesives or high temperatures. As electronic devices get smaller and smaller, and the desire to have bendable, wearable, and on-skin electronics increases, conventional methods of constructing these devices have become impractical. One of the biggest problems is how to connect and integrate multiple devices or pieces of a device that each resides on separate ultra-thin polymer films. Conventional methods that use layers of adhesive to stick electrodes together reduce flexibility and require temperature and pressure that are damaging to super-thin electronics. Conventional methods of direct metal-to-metal bonding are available but require perfectly smooth and clean surfaces that are not typical in these types of electronics. A team of researchers led by Takao Someya at RIKEN CEMS/CPR has developed a new method to secure these connections that do not use adhesive, high temperature, or high pressure, and does not require totally smooth or clean surfaces. In fact, the process takes less than a minute at room temperature, followed by about a 12-hour wait. The new technique, called water-vapor plasma-assisted bonding, creates stable bonds between gold electrodes that are printed into ultra-thin—2 thousandths of a millimeter!—polymer sheets using a thermal evaporator. “This is the first demonstration of ultra-thin, flexible gold electronics fabricated without any adhesive,” says Senior Research Scientist Kenjiro Fukuda of RIKEN CEMS/CPR. “Using this new direct bond technology, we were able to fabricate an integrated system of flexible organic solar cells and organic LEDs.” Experiments showed that water-vapor plasma-assisted bonding performed better than conventional adhesive or direct bonding techniques. In particular, the strength and consistency of the bonds were greater than what standard surface-assisted direct bonding achieved. At the same time, the material conformed better to curved surfaces and was more durable than what could be achieved using a standard adhesive technique. According to Fukuda, the method itself is surprisingly simple, which might explain why they discovered it by accident. After fixing the gold electrodes onto polymer sheets, a machine is used to expose the electrode sides of the sheets to water-vapor plasma for 40 seconds. Then, the polymer sheets are pressed together so that the electrodes overlap in the correct location. After waiting 12 hours at room temperature, they are ready to use. Another advantage of this system is that after activation with water-vapor plasma, but before being bonded together, the films can be stored in vacuum packs for days. This is an important practical aspect when considering the potential for ordering and distributing pre-activated components. As proof of concept, the team integrated ultra-thin organic photovoltaic and LED-light modules that were printed on separate films and connected by five additional polymer films. The devices withstood extensive testing, including being wrapped around a stick and being crumpled and twisted to extremes. Additionally, the power efficiency of the LEDs did not suffer from the treatment. The technique was also able to join pre-packaged LED chips to a flexible surface. “We expect this new method to become a flexible wiring and mounting technology for next-generation wearable electronics that can be attached to clothes and skin,” says Fukuda. “The next step is to develop this technology for use with cheaper metals, such as copper or aluminum.” For more information, visit: https://www.riken.jp/en/news_pubs/research_news/pr/2021/20211223_1/index.html

Speaker: Sean Chang | Company: Texas Instruments | Date: 11-12 May 2021 | Full Presentation Traditional semiconductor manufacturing has remained largely unchanged throughout the modern era, and growing efforts to increase throughput and reduce cost provide an ever more compelling case for applications where the flexibility of additive manufacturing can intercept. This talk will explore opportunities, challenges and the road ahead towards adaptation of printed electronics within the semiconductor industry. Join TechBlick on an annual pass to join all live online conference or online version of onsite conference access library of on-demand talks (600 talks + PDFs) portfolio of expert led masterclass year-round platform https://www.techblick.com/ And do NOT miss our flagship event in Berlin on 17-18 OCT 2023 focused on Reshaping the Future of Electronics. This event attracts 550-600 participants from all the world and offers a superb ambience and dynamic exhibition floor. To learn more visit https://www.techblick.com/electronicsreshaped To see feedback about previous event see https://www.techblick.com/events-agenda

Inuru announced the first use of its OLED solutions in a Hoodie made for LOOK LABS, a digital luxury brand based in Düsseldorf. Comfy420 Metalight™ Hoodie (NFT+Physical) LOOK LAB has recently launched a game called 420. As usual, gamers are able to buy in-game items to improve their gaming experience. with special utility and purpose in the game. Those items are very limited and give an advantage to whoever owns them. The light effect comes from Inuru's free-form OLED. These are powered with integrated thin-film batteries that can be recharged wirelessly. The hole technology is integrated into a thin and light-weight film, that is so robust that it can be washed as any other fashion product. Inuru OLED solutions are washable and easy to integrate in fashion With the launch of the Hoodie Inuru announces another milestone in its company history. After having products in packaging before, the Inuru Laboratories in Berlin Adlershof has developed electronics solutions that can be easily integrated into fashion. "Our latest solution can be applied easily on any type of fashion product with standard manufacturing processes and is, of course, washable," says Matti Prasdorf lead product engineer behind the fashion application at the Inuru Laboratories in Berlin-Adlershof. The processes have been tested within multiple projects with major fashion and apparel brands. Inuru solutions have been successfully integrated at the typical fashion production sites across the globe without any further investment for the manufacturer. "With the latest achievement, we have once again expanded the application range and market for our technology. With that, we continue our strategy to bring OLED everywhere ." Marcin Ratajczak, founder/CEO, Inuru. In the near future, the company seeks to further expand its technology into further application, where the integration of light for user interfaces, guidance, warning, ambiance, or branding was problematic so far. For more information, visit: https://www.inuru.com/post/inuru-announces-first-oled-fashion-application

Printed Electronics is everywhere and can be found in applications as diverse as a smart diaper to a precision missile. In this article, TechBlick will highlight some application and technology development cases for roll-to-roll (R2R) printed electronics. In doing so, TechBlick will take you on a journey spanning applications in healthcare, automotive, photovoltaics, displays, and beyond. The common thread here is R2R printing of electronics regardless of printing technique, e.g., screen, flexo, gravure, slot die, etc. The applications reviewed herein are presented randomly and follow no particular order of importance. The images and examples below are extracted from 2021 presentations given at TechBlick, which is the home of printed, flexible, hybrid, and in-mould electronics. TechBlick Individual Annual Pass or Group Access benefits for 12 months: Events: Participate in all interactive LIVE (online) TechBlick events Networking: Connect with the key players across the value chain from OEMs to material suppliers Train: Learn the ins and outs of technologies from our portfolio of expert-led masterclasses Market Assessment: Follow the latest market info and forecasts from leading market research analysts Information Portal: Access the on-demand library of state-of-the-art fresh presentations Discount: Major discount to participate in in-person physical events Printed, Flexible, Hybrid, and/or R2R Electronics | Additively Manufactured Electronics | Electronic Packaging | Quantum Dots | Micro- and Mini- LEDs | Printed and Flexible Displays | InMold Electronics | Fineline and Nanoimprinting | E-Textiles | Wearable Sensors | Intelligent Skin Patches | Graphene and 2D Materials | Carbon Nanotubes | Material Informatics | Solid State Batteries | InMold, Structural, and 3D Electronics | Perovskite, Organic, and Hybrid Photovoltaics | Battery Material Innovations Medical sensors Many sensors are printed. For example, glucose test strips are printed, often R2R. Given that they are a declining market thanks to rising of continuous glucose monitoring (CGM), we will not review them further here. The image below shows two examples of R2R screen-printed sensors. The left image shows EKG electrodes R2R produced in large volumes, e.g., >1M/year units. The right image is an example of an incontinence sensor commercially R2R screen printed using conductive carbon on a stretchable non-woven material. It is an advancement of the art of functional R2R screen printing to be able to print using stretchable inks onto such thin and even stretchable substrates without creasing or improper stretching and without shrinking during the ink curing steps. Source: Mekorprint Rotary screen printing is also the basis of more advanced wearable medical sensors: smart skin patches. Below is a schematic of such product, involving rotary screen printing of stretchable conductive inks, dielectric inks, silver chloride inks, and beyond. These smart electronic skin patches are the basis of a wearable sensor platform enabling the measurement of vital signs. The patches can start with measuring heart rate and respiration and move on to other physiological parameters. Source: Quad Industries Another interesting recent commercial success story in R2R printed electronics is in a grade-I medical product developed by InnovationLab GmbH (iL) for Dr Jean Bausch GmbH & Co. KG: a digital articulating paper for digitally measuring the topography of teeth. These are 60μm thin sensors R2R printed on PI substrates using piezoresistive and silver inks, enabling digital measurement of 256 pressure levels. The pilot R2R machine at iL can print five layers within one run and can print on a 33cm web with lengths up to 17m. Furthermore, the machine, shown below, integrates various curing (hot air, IR, UV, hot embossing) as well as converting (laminating, slitting, die& kiss cutting) modules. This machine can run up to 160 serial meters per minute (actual device not produced at this speed). The production machines, by iL's partners Heidelberger Druckmaschinen AG, can handle 44cm webs at much higher speeds thanks to a long, e.g., 25m, drying section. Source: Innovation Lab GmbH and Dr. Jean Bausch GmbH & Co. KG presented at TechBlick 2021 Automotive The next application I wish to highlight is in the automotive sector. A major trend in this industry is the replacement of mechanical switches with capacitive ones. The image below is from PolyIC GmbH (a Kurz company), showing an R2R printed transparent touch film integrated inside the driving wheel or gear of a vehicle. The transparent sensors are an R2R printed metal mesh film, consisting of 100nm thick silver nanoparticle inks printed with a line width and spacing of 10µm and 100 µm, respectively. The exact R2R printing technique is proprietary. Source: PolyIC GmbH presented at TechBlick May 2021 Smart Packaging The next highlighted application is in smart pharmaceutical packaging to improve medication adherence. Jones Healthcare Packaging has been actively developing this technology since 2013 and it is now in commercialization with real samples being tested by patients. The initial development was based on a narrow web pilot R2R printer (shown below) on a PET substrate using silver/carbon inks. The current product is flexographically printed using carbon inks on paper substrates. The printed carbon circuitry is shown below. This is of course the first generation of products. In the future, functional electronics, as well as printed displays, could be integrated into the smart packaging itself. Source: Jones Healthcare presented at TechBlick March 2021 With the Annual Pass or Group/Company Access you can already access the following content from TechBlick 2021 events: (1) The Future of Photovoltaics: Organic, Perovskites, CIGS, Hybrid (2) Printed, Flexible, Hybrid, & InMold Electronics (3) Graphene & 2D Materials: End Users, Applications, Major Producers & Start-Ups (4) Quantum Dots: Material Innovations, Commercial Applications (5) Printed, Hybrid, Structural, & 3D Electronics (6) Displays & Lighting: Innovations & Market Trends (7) Wearable Sensors & Continuous Vital Signs Monitoring (8) Electronic Textiles & Skin Patches: Hardware & Software (9) Electronics Packaging Symposium: AI Chips, 5G Packaging, Chiplets. Heterogeneous Integration, High-Density Fan-Out Packages, Scaling, Future of Semiconductors You can also see TechBlick’s growing portfolio of masterclasses Photovoltaics Now lets us switch focus to highlight R2R printed electronic applications in the photovoltaic industry. Organic photovoltaics has been in commercial development for 20 years or longer. Many may recall the heady days of Konarka (est. 2001), which went bankrupt in 2012 after having raised some $170M. Technology development continued without pause despite this setback. Now, both R2R printed and R2R evaporated approaches are reaching a high level of technology maturity. The example below is from Sunew in Brazil which have taken steps to scale up the production. The production line consists of 5 print stations, each station laying down one layer in the OPV stack. There are 32 print lines across the width of the web. The web width is 50cm and the length can be up to 1.5Km. Sunew can maintain thickness uniformity of <2% across the web width. Note that a major challenge in scale-up from lab results is the control of interlayer interfaces and the morphology of the donor-acceptor active layer. The left image shows how they can maintain a consistent efficiency as they go towards the 500mm web. The panel of images on the right show examples of actual installations of the R2R produced organic photovoltaic cells. Note that others such as Armor (R2R coating) and Heliatek (R2R evaporated tandem cell) are also scaling up the process in speed and width. Source: Sunew (Presented in May 2021 at TechBlick conference) Of course, many these days actively pursue perovskite photovoltaics (PePV), which have shown the fastest learning curve of all PV technologies. This technology can also be printed. For example, Energy Material Corp (EMC) is scaling up fully-inline unwind-to-wind R2R production of PePV. The right image below shows the ongoing transition from a pilot to a large-scale production line, highlighting the ambitious scale of the operation. The production line will involve R2R printing on 1.5m webs of 100µm thick flexible glass at web speeds approaching 30m/min. The ambition is to have an R2R printed PePV factory able to produce 20 million square meters per year. The transparent conductive layer includes an R2R metal mesh layer printed using R2R flexography using Kodak technology. The metal mesh film shown below on the left is printed on 100µm Corning glass at 60m/min. The linewidths are not disclosed but the Kodak process can print sub-10 µm linewidths reliably at high web speeds. Source: EMC (right) and Kodak (left). Kodak image from a presentation at TechBlick (March 2021). With the TechBlick Annual pass you can also participate in the following events in 2022: (1) Battery Materials: Next-Gen & Beyond Lithium-Ion (2) Solid-State Batteries: Innovations, Promising Start-ups, Future Roadmap (3) Printed, Hybrid, InMold, and 3D Electronics (4) The Future of Electronics RESHAPED (5) Micro- and mini-LEDs (6) Quantum Dots: Material Innovations & Commercial Applications (7) Graphene & 2D Materials: End Users, Applications, Major Producers & Start-Ups (8) 5G/6G Materials (9) Material Informatics (10) Wearable Medical Sensors, E-Textiles, and Continuous Vital Signs Monitoring Explore all our events Displays R2R printing is also used to print electrochromic displays. This technology is not new but is now ready for mass production. The Ynvisible production line, based on R2R screen printing is shown below. The electrochromic display is multilayer consisting of a silver layer, counter electrode, electrolyte, symbol layer, electrochromic layer, and a graphic layer all sandwiched by a top and bottom moisture barrier substrate. To reduce production costs, converting and testing also take place inline R2R which is an important step forward. These printed electrochromic displays are suited for simple segmented displays targeted at high-volume IoT applications. The displays are <300µm thick and can be bent to a radius of 10mm. Furthermore, there is a very low power (1µW/cm2) as they can retain their state for 15min or longer before requiring a refresh. They can be powered at 1.5-3V and can be driven using simple microelectronics. This means that they could be powered by printed batteries and printed OPVs (see right image below showing such demonstrator). These displays can be attached to a target substrate using adhesives. In the latest developments, a graphical layer can also be added to give a sense of colour so the displays are on-brand. Source: Ynvisible presented at TechBlick in July 2021 R2R printing is and can be used in other types of more complex displays. In quantum dot (QD)-LCD displays, the enhancement QD film is R2R slot die coated. An example is shown below on the right. This is a commercial success story. Printing may also play a role in the emerging microLED technology. It can be used to print wrap-around interconnects connecting the front side and backside of the glass substrate. It can also deposit bumps, connection pads, etc. Early-stage development work is also underway to explore the possibility of some type of R2R process for placing the micro-LEDs themselves. Here, I highlight one early-stage approach based on the LIFT (laser-induced forward transfer) process followed by R2R rapid photo sintering on low-temperature substrates using standard solder. In LIFT, a laser pulse is shone through a patterned transparent carrier. The laser hits a proprietary release coating, which releases the material or the component. The roadmap shown below on the left is by Holst Centre, showing how they first demonstrated, on a small-scale machine, narrow-line deposition of materials before progressing the technology towards component transfer. Recently, Holst demonstrated the use of LIFT to transfer 40x40x50 µm3 micro-LEDs with 80µm gap and 500µm interconnects. This lab-scale demo had a (relatively) low yield of 98% with 20% of LEDs ending up on their side. These results are far from production-ready, but they establish a roadmap with large improvement potential. This technique, when combined with R2R photo sintering, offers the chance to develop a fully R2R process. Source: Right showing LIFT process by Holst Centre presented at TechBlick in June 2021. Left showing R2R slot die coated quantum dot enhancement film by Nanosys and partners. There is tremendous progress in fineline R2R printing. The image below shows examples of work from Asahi Kasei in Japan. The company has developed a seamless roller mold (SRM) using electron beam lithography to achieve high-resolution seamless R2R imprinted films. Some results are also shown below, demonstrating the ultrafine feature capability of this R2R process. The application is close to commercialization, especially as a transparent RFID for track and trace. Source: Asahi Kasei R2R nanoimprinting can also be used to R2R create ultrafine features. The example below is hybrid R2R continuous process, developed by Printable Electronics Research Centre in Suzhou. The process enables the formation of ultrafine feature (<5µm) embedded metal mesh structures aimed at transparent touch and heating applications. The left schematic in the image below shows the process flow. Note that the embossing takes place using a rolling nano-embossing drum. The images in the middle show the metal mesh pattern and the embedded nature of the conductive lines, which enables one to thicken the line to achieve higher conductivity without compromising surface smoothness. The right image below shows an R2R machine that was previously deployed by O-Film to commercially R2R produce these metal mesh touch screens. At its peak, 1.5 million such panels were produced annually. Source: Printable Electronics Research Centre in Suzhou presented at TechBlick March 2021 As a final topic to close our review, I would like to mention R2R RFID printing and how it is evolving towards R2R production of complex multi-chip hybrid circuits. In this case, I pick an example from Smooth & Sharp (S&S) in Taiwan which developed R2R printing on paper. In the simplest case, S&S began to R2R manufacture NFC on paper. These NFCs were at least 2x the price of their conventionally manufactured on-plastic counterparts two years ago. Now, S&S indicates that price parity is reached, which can help render more markets accessible. Importantly, this is also the beginning of technical development. The NFC antennas have one small chip and a single metallization layer. As shown below, the future will be developing towards more chips, more layers, and more complicated circuit designs. The examples below show the integration of a 2-chip (NFC and LED chips) tag, the development of an 11-component piece (2 active layers and 10 passive components), and the demonstration of a 6-layer tag R2R printed on paper. This is a very promising trend overall. The manufacturing facility for flexible hybrid electronics (FHE) is still in its relatively early stages of development but is advancing. Advanced ultrathin flexible chips, either natively flexible or thinned down, are becoming available. Currently, with the help of RDLs (re-distribution layers) these packages become capable with the resolution of printed lines on a flexible substrate. Importantly, low temperature attach techniques (photosintered solder, ultralow temperature solder, or particle-aligned conductive adhesives) are emerging to enable component to attach on PET and paper. This is the beginning of the roadmap towards R2R manufacturing of complex hybrid electronics. In summary, we demonstrate that R2R printed electronics is really everyone with numerous applications. It is a vibrant and fast-evolving landscape. To learn more about this technology and ecosystem please refer to TechBlick (www.TechBlick.com). TechBlick is the home of printed, flexible, hybrid, 3D, in-mould, and 3D electronics worldwide. Source: Smooth & Sharp presented at TechBlick May 2021 This seems like a simple prototype, but many technical challenges need to be overcome, especially as the surface is non-flat. In particular, the reliability of the components at interfaces (see below) needs to be tested and guaranteed. A major source of unreliability at these interfaces is the mismatch in the coefficient of thermal expansion of the different materials, which leads to stress build-up during thermal cycling. As shown in the table below, there is a wide range of coefficients involved. A particular problem area can be the connection to the face-up dies. Here, aerosol deposits dielectric ramps upon which Ag tracks are aerosol printed. The conductive tracks can break, slip off, or disclose. Similarly, conductive tracks across areas filled with adhesive areas can also be a challenge. In this study, Parsons showcased its strategies to carry out reliability tests. When you join TechBlick, you can hear and network with the following companies: ... and hundreds of others ...

Microbond® SMT650 high-reliability solder paste achieves a consistently high surface insulation resistance that prevents electrochemical migration. Combining the new F650 flux system with the Innolot® alloy delivers superior reliability—particularly in miniaturized systems in the automotive industry. Electrochemical migration is a form of corrosion that negatively affects the reliability and service life of electronic components. It is caused by moisture—either during the circuit board manufacturing process or due to external factors. Miniaturization and the resulting minuscule distances between conductor paths lead to greater electric field intensity, which in turn increases the risk of electrochemical migration. One example is the control units in vehicles: Fluctuations in temperature can lead to condensation, and this can result in moisture reaching the circuit board. When combined with flux residue, this moisture can lead to negative interactions such as the formation of dendrites and eventually lead to short circuits. Microbond® SMT650 solder paste achieves a consistently high surface resistance that prevents electrochemical migration. In addition, the specially developed F650 flux system can be combined with different alloys. The combination of the F650 flux system with Innolot® alloy delivers superior reliability— especially in miniaturized systems in the automotive industry. Its material composition provides a consistently high surface resistance that prevents electrochemical migration. Furthermore, Microbond® SMT650 is compatible with conformal coatings, solder resist, active and passive components, various PWB materials, and combinations. For applications with low thermomechanical requirements, Heraeus offers Microbond® SMT650 solder paste with a tin-silver-copper alloy (SAC). Key benefits of Microbond® SMT650: Preventing electro-migration in fine feature applications - no dendrite growth and electrochemical migration is observed for various SIR test after 1500 h Excellent thermal mechanical strength, in combination with Innolot® alloy Clear residue Excellent printing Efficient wetting Residue is compatible with a wide range of conformal coating materials Type 4 powder for fine pitch applications For more information, visit: https://www.heraeus.com/en/het/products_and_solutions_het/solder_materials/solder_paste_smt/microbond_650/MicrobondSMT650.html

Heterogeneous Integration, AI Chips, 5G Packaging, Chiplets, High Density Fan-Out Packages, Scaling, Future of Semiconductors 3D and Conformal Printed Electronics have many existing and emerging applications in Electronic Packaging. In the talk you will learn about the different techniques that one can deploy in 3D and conformal printed electronics. Furthermore, you will learn about different applications ranging from antenna printing to medical devices to conformal as well as area-selective package-level EMI shielding to wire-bond replacement especially for ultra-high frequency packages to heat management in stacked die packages or high-power semiconductor packaging to prototyping of redistribution layers. Finally, you will also hear about emerging digital ultraprecise printing. Here, we exclude exciting approaches as wafer printing. To learn about wafer printing visit the Nano-ops talk at the Techblick platform or read a future newsletter. 3D & Conformal Printed Electronics in Electronic Packaging World-Class Symposium on Electronic Packaging TechBlick is delighted to bring you a world-class symposium covering cutting-edge innovations in electronic packaging. This symposium was originally organized by the Integrated Electronics Engineering Center (IEEC) of Binghamton University. The symposium can now be accessed with a TechBlick Annual Pass granting you access to all online Techblick events for 12 months, access to TechBlick ever expanding portfolio of industry-led masterclasses, and access to TechBlick Netflix-like library of state-of-the-art presentations. if you are not a member, sign up here until 4 November 2021 to save 100 Euros, making the pass just 500 Euros per year (apply code Save100Euros at check-out). Alternatively, you can also set up a monthly payment of € 50 per month with a minimum contract period of 6 months. To do this, email chris@TechBlick.com *original attendees of the symposium can retain their access. Please contact the organizers for your access details. What is included in an Annual Pass: The Annual Pass is € 600 per year. However, until 4 November, you can save € 100, making it € 500 per year. To benefit from the discount, use the following code at registration: Save100Euros. In additional, you request a monthly payment plan of € 50 per month with a minimum commitment period of 6 months. To request this, email chris@TechBlick.com (1) Access to all the past & future events: PAST EVENTS MARCH 21: Printed, Flexible, Hybrid, & InMold Electronics APRIL 21: Graphene & 2D Materials: End Users,Applications, Major Producers &Start Ups MAY 21: Quantum Dots: Material Innovations, Commercial Applications MAY 21: Printed, Hybrid, Structural, & 3D Electronics JULY 21: Displays & Lighting: Innovations & Market Trends OCT 21: Wearables Sensors & Continuous Vital Signs Monitoring OCT 21: Electronic Textiles & Skin Patches: Hardware & Software OCT 21: Printed & Flexible Sensors & Actuators Upcoming Events 2021 4-5 Nov (on-demand): Electronics Packaging Symposium: AI Chips, 5G Packaging, Chiplets. Heterogeneous Integration, High Density Fan-Out Packages, Scaling, Future of Semiconductors 1 - 2 DEC (LIVE online): Future of Photovoltaics: Organic, Perovskites, CIGS, Hybrid Upcoming Events 2022 9-10 Feb 2022 (LIVE online): Solid-State Batteries: Innovations, Promising Start-ups, Future Roadmap 9-10 Feb 2022 (LIVE online): Battery Materials: Next-Gen & Beyond Lithium Ion March 2022(LIVE online): Material Informatics March 2022(LIVE online): Printed, Hybrid, InMold Electronics April: Graphene, CNTs and 2D Materials (past agenda; future agenda TBA) Q2/Q3 2022: Quantum Dots (past agenda; future agenda TBA) Q2/Q3 2022: Micro- and mini-LEDs (past agenda; future agenda TBA) Q2/Q3 2022: 5G/6G Materials (2) Netflix-like library of on-demand content You have access to all the presentations from our past events. Currently there are over 200 on-demand (and growing) presentations from leading global organisations. Click here to browse the content. (3) Masterclasses You will have access to our ever-growing library of industry-led masterclasses, blending theory with practice. The currently-announced programme includes. Read more

VTT has developed a thin, flexible, and plastic-free heater to help in lowering the energy consumption at homes and offices and also to achieve individual comfort temperatures. When attached to seats, walls, or floors, heaters can in the future identify their users and immediately generate heat to the individual temperature preferences of the occupants. Hot Delivery Company piloting the use of heaters in food delivery bags. The use of insulation materials and reduction of room temperatures are means to lower the energy consumption of buildings to prevent climate change. A one-degree decrease in room temperature leads to roughly 5% savings in heating costs. However, the comfort of residents suffers if the temperature of homes is decreased by several degrees. Comfortable temperatures can be achieved locally very quickly and with lower total energy consumption, if the heating can turn on and off rapidly as needed on the surfaces around the inhabitants, for example on the floor surface, on a seat cushion, or on the wallpaper of an adjacent wall. Comfort and warmth at home Surfaces can be heated with the thin, bendable, and flexible heater developed by VTT, which is produced by printing the heating electronic components with a roll-to-roll method. A 50 micrometers or 0.05 millimeters thick metal mesh can be cut to form and installed on, for example, fabric, paper, or floor laminate without an additional support layer. This has a very limited impact on the properties of the material, such as bending, stretch, or breathability, unlike the layer structures used in earlier floor and roof heating systems. “We can produce extremely wide-ranging and fast heaters for different surfaces, and they can be controlled zonally by a common control system. In the future, intelligence can also be added to the heaters with sensors that can identify the person in the room and their perception of the comfort temperature, for example. With the help of the sensors, the heater could also function as part of the safety system”, explains Principal Scientist Terho Kololuoma from VTT. A heater suitable for food delivery bags and table disinfection Home heating is just one example of what the flexible heater developed by VTT can do. When assessing the suitability of the technology, the research group has cooperated, for example, with the Finnish Hot Delivery Company that develops intelligent transport solutions for catering services. In Finland, the Finnish Food Authority Evira requires that the temperature of food delivered hot does not drop below 60°C to prevent the growth of microbes that are harmful to humans. “We are developing a new generation of food transport solutions to ensure that the delivered food is both delicious and safe when it arrives. We are piloting the flexible VTT heater in our new food delivery bag as the properties of the heater seem promising”, says Aleksi Rautavuori from Hot Delivery Company. “Our heater could also be used to disinfect tables and other surfaces in hospitals and other public areas. The surface temperature can be quickly raised up to 130 degrees”, Kololuoma explains. For more information, visit: https://www.vttresearch.com/en/news-and-ideas/precision-heating-home-and-office-vtt-developed-flexible-heater-meeting-individual

Electroninks, the leader in particle-free conductive metal inks and advanced materials, today announced the addition of gold (Au) and platinum (Pt) particle-free conductive inks to its catalog of products. The addition of gold and platinum inks gives makers of consumer electronics, medical devices, sensors, and semiconductors the ability to make lighter, less expensive, and more environmentally friendly products. ​​The demand for powerful microelectronics packed into consumer and industrial products of different shapes and sizes has never been greater. From foldable displays in new 5G phones to medical sensors in athletic wear to new materials and architecture in semiconductor packaging, powerful tiny circuitry is making it possible, and Electroninks’ broader line of conductive inks is enabling greater innovation in this field. Electroninks has already established a superior particle-free ink in the market with its conductive silver ink. The new gold and platinum metal inks consist of metal-organic precursors that decompose cleanly at lower temperatures than nanoparticle inks and can be UV-cured. The inks are unique to the market, providing deep savings on material use (and waste) and costs for customers by enabling similar electrical and reliability properties of vacuum or plated films of gold and platinum. Opening additional doors in product manufacturing, the new inks are catalytically active (may serve as a seed layer) and have a high corrosion resistance — ideal for protective circuits, gas, thermal and biological sensors. Unlike traditional gold and platinum inks that are based on metal nanoparticles dispersed with organics/polymers which degrades performance, Electroninks’ particle-free inks enable reliable printing and manufacturing in non-typical and even space-like environments for its aerospace and defense customers. Commitment to the Customer Electroninks first developed silver inks based on the philosophy that pure metallic films are the best way to increase performance and reliability while reducing the overall cost of manufacturing and ownership. Aligning with its mission to fundamentally change the way its customers develop new hardware technologies and improve manufacturing processes, Electroninks developed gold and platinum inks to fill the need of a wide range of applications in electronics, including forming contacts in microelectronic devices, high temperature, electrochemical and catalytic applications. The gold and platinum inks provide high performance and reliability at high temperatures, making them ideal for use in aerospace and biomedical devices. “As electronic materials and supply chains become more critical due to their usage in nearly all products that impact our lives, the demand for innovation and products making it all possible has hit a tipping point, as we have seen in the past year. Electronics are now miniaturized, wearable, foldable and manufactured with new methods all at the same time,” said Melbs LeMieux, co-founder, and president, Electroninks. “Entirely new solutions providing greater design flexibility are needed. We are committed to providing our customers with the highest quality inks to meet new technological demands that will shape the future of every electronic product.” The Particle-Free Difference Electroninks has developed particle-free inks to provide the markets with a material that can withstand high temperatures and humidity, making them ideal for use in an increasing variety of applications. With the excellent reliability of the material combined with iso-certified manufacturing, Electroninks is the only company to deliver this level of quality and performance from gold and platinum materials. The company aims to be the main supplier of true high-volume manufacturing particle-free metal complex inks on the market. These inks are a direct replacement for nanoparticle inks, metal paste, and sputtered or deposited metals. Electroninks inks resulting films are stretchable, highly reflective, RoHS compliant, catalytically active, and antimicrobial, allowing developers to utilize multi-hour printing to produce products showcasing extreme detail. Particle-free inks also have a longer shelf-life than nanoparticle solutions because traditional binders and surfactants are not used in Electroninks’ metallo-organic inks. Electroninks inks are free from impurities – approaching 99.99% metal in resulting films, providing superior environmental stability and reliability. Due to the superior conductivity that Electroninks’ particle-free inks offer, the same device performance can be achieved by using much less material at a fraction of the regular production costs. The high prices of gold, platinum, and other precious metals have limited their widespread use in the advanced manufacturing industry. Electroninks’ particle-free inks are able to reduce prices without sacrificing quality, which can have a broad impact on the overall conductive precious metals market and their sustainable usage. For more information, visit: https://www.electroninks.com/electroninks-expands-line-of-particle-free-conductive-inks-with-new-gold-and-platinum-formulations/

- Transforming traditional battery architecture Speaker: Gregory Hitz | Company: ION Storage Systems | Date: 9-10 Feb 2022 | Full Presentation Solid-state battery cells offer the ability to host high energy density lithium metal while affording safety above that of state-of-the-art lithium-ion cells due to the use of non-flammable electrolytes and dense layers that cannot be easily punctured by lithium dendrites. Ion Storage Systems (ION) employs a high-ionic conductivity garnet-based electrolyte capable of lithium metal plating without degradation at a wide range of operating temperatures. In many solid-state cell architectures pursued to date, lithium metal plating directly leads to cell internal volume changes. Ensuring consistent lithium plating over a planar surface necessitates external compression which can add to cell and pack overhead costs while decreasing the overall specific energy density of the system as a whole. ION’s solid-state electrolyte is incorporated into cells in a bilayer structure that allows lithium to plate within the confines of a porous ceramic layer which is sintered on a cathode-separating dense ceramic layer. This structure enables constant-volume cells which can host a multitude of cathodes and enable simplified application integration, high energy density and prolonged cycle life. Join TechBlick on an annual pass to join all live online conference or online version of onsite conference access library of on-demand talks (600 talks + PDFs) portfolio of expert led masterclass year-round platform https://www.techblick.com/ Our next battery-related event will take place on 15-16 FEB 2023, covering 1) Solid-State Batteries: Innovations, Promising Start-Ups, & Future Roadmap 2) Battery Materials: Next-Generation & Beyond Lithium Ion The speakers include: General Motors, Graphenix Development, Brookhaven National Laboratory, Fraunhofer IKTS, RWTH Aachen University, Lawrence Livermore National Laboratories, Meta Materials Inc, Skeleton Technologies, Solid State Battery Inc, Argonne National Laboratories, OneD Battery Sciences, VTT, Leyden Jar Technologies B.V., b-Science, Rho Motion, Wevo-Chemie, LiNA Energy, CNM Technologies, Ionblox, Empa, Zinc8 Energy Solutions, Avicenne Energy, Echiontech, South8 Technologies, Basquevolt, NanoXplore, Chasm, Li Metal, Sila Nanotechnologies, Quantumscape (tentative), Fraunhofer ISI, etc https://www.techblick.com/

A Christmas tree with a thickness of one atom was made at DTU. It shows how terahertz measurements can be used to ensure the quality of graphene. The Christmas tree in the pictures is 14 centimeters long. Since it is made of graphene, it consists of carbon atoms in only one layer and is only a third of a nanometer thick. It is cut out of a 10-meter long roll of graphene, transferred in one piece using a rebuilt laminating machine, and then scanned with terahertz radiation. The experiment shows that continuous quality control can be done during the production of graphene, which is expected to play a significant role in future high-speed electronics, i.e. medical instruments, and sensors. Graphene is a so-called two-dimensional material, i.e. it consists of atoms in one cohesive layer that is only one atom thin. It is more robust, stiffer, and better at conducting electricity and heat than any other material we know of. Therefore, graphene is an obvious candidate for electronic circuits that take up less space, weigh less, are bendable, and are more efficient than the electronics we know today. “Even if you could make a pencil drawing of a Christmas tree and lift it off the paper—which, figuratively, is what we have done—it would be much thicker than one atom. A bacterium is, e.g. 3000 times thicker than the graphene layer we used. That’s why I dare call this the world’s thinnest Christmas tree. And although the starting point is carbon, just like the graphite in a pencil, graphene is at the same time even more conductive than copper. The “drawing” is made in one perfect layer in one piece, “ says Professor Peter Bøggild who lead the team behind the Christmas tree experiment. “But behind the Christmas joke hides an important breakthrough. For the first time, we managed to make in-line quality control of the graphene layer while we transferred it. Doing this is the key to gaining stable, reproducible and usable material properties, which is the prerequisite for utilizing graphene in, e.g. electronic circuits.“ 30,000 times thinner than kitchen film As the researchers have done in this case, the graphene can be “grown” on copper film. The graphene is deposited on a roll of copper foil at around 1000 ° C. That process is well known and well-functioning. But a lot can go wrong when the ultra-thin graphene film is moved from the copper roller to where it is used. Since graphene is 30,000 times thinner than kitchen film, it is a demanding process. Researcher Abhay Shivayogimath has been behind several new inventions in DTU’s transfer process, ensuring a stable transfer of the graphene layers from the copper roll. Moreover, there has been no technology that could control the electrical quality of graphene on the go - while transferring it. This year Peter Bøggild and his colleague Professor Peter Uhd Jepsen from DTU Fotonik, one of the world’s leading terahertz researchers, established a way to do it. The colored images are measurements of how the graphene layer absorbs terahertz radiation. The absorption is directly related to the electric conductivity: the better the conductive graphene, the better it absorbs. Terahertz rays are high-frequency radio waves that lie between infrared radiation and microwaves. Like X-rays, they can be used to scan human bodies, as we know it from airport security. Terahertz rays can also take pictures of the electrical resistance of the graphene layer. By connecting the terahertz scanner to the machine that transfers the graphene film, it is possible to image the electrical properties of the film during the transfer process. Official international measurement standard Suppose the implementation of graphene and other 2D materials is to be accelerated. In that case, ongoing quality assurance is a prerequisite, says Peter Bøggild. Quality control precedes trust, he says. The technology can guarantee that graphene-based technologies are manufactured more uniformly and predictably with fewer errors. This year, the DTU researchers’ method was approved as the first official international measurement standard for graphene. Their method was described earlier this year in the article Terahertz imaging of graphene paves the way to industrialization. The potential is excellent. Graphene and other two-dimensional materials can e.g. enable the manufacturing of high-speed electronics performing lightning-fast calculations with far less power consumption than the technologies we use today. But before graphene can become more widespread on an industrial scale and be used in electronics, we encounter in everyday life three main problems that must be solved. First, the price is too high. More and faster production is needed to bring the price down. But with that, you face the second problem: When you increase the speed and can not at the same time check the quality, the risk of error also increases dramatically. At high high-speed transfer, everything must be set precisely. This brings us to the third problem: How do you know what is precise? It requires measurements. And preferably measurements during the actual transfer process. The DTU team is convinced that the best bet on that method is quality control using terahertz radiation. Peter Bøggild emphasizes that these three problems have not been solved with the new method alone: “We have taken a very significant step. We have converted a laminating machine into a so-called roll-2-roll transfer system. It gently lifts the graphene layer from the copper roll on which the graphene layer is grown and moves it onto plastic foil without it breaking, becoming wrinkled, or dirty. When we combine this with the terahertz system, we can immediately see if the process has gone well. That is, whether we have unbroken graphene with low electrical resistance, ”says Peter Bøggild. For more information, visit: https://www.dtu.dk/english/news/2021/12/verdens-tyndeste-juletrae-er-lavet-paa-dtu?id=b464d7c5-894c-44c8-93c6-07dc8b3ed784

Speaker: Jean-Rémi Pouliot | Company: Brilliant Matters | Date: 11-12 May 2021 | Full Presentation Join TechBlick on an annual pass to join all live online conference or online version of onsite conference access library of on-demand talks (600 talks + PDFs) portfolio of expert led masterclass year-round platform https://www.techblick.com/ And do NOT miss our flagship event in Berlin on 17-18 OCT 2023 focused on Reshaping the Future of Electronics. This event attracts 550-600 participants from all the world and offers a superb ambience and dynamic exhibition floor. To learn more visit https://www.techblick.com/electronicsreshaped To see feedback about previous event see https://www.techblick.com/events-agenda

An international research team led by scientists from Nanyang Technological University, Singapore (NTU Singapore) has developed a material that, when coated on a glass window panel, can effectively self-adapt to heat or cool rooms across different climate zones in the world, helping to cut energy usage. Developed by NTU researchers and reported in the top scientific journal Science, the first-of-its-kind glass automatically responds to changing temperatures by switching between heating and cooling. The self-adaptive glass is developed using layers of vanadium dioxide nanoparticles composite, Poly(methyl methacrylate) (PMMA), and low-emissivity coating to form a unique structure that could modulate heating and cooling simultaneously. The newly developed glass, which has no electrical components, works by exploiting the spectrums of light responsible for heating and cooling. During summer, the glass suppresses solar heating (near-infrared light), while boosting radiative cooling (long-wave infrared) - a natural phenomenon where heat emits through surfaces towards the cold universe - to cool the room. In the winter, it does the opposite to warm up the room. In lab tests using an infrared camera to visualize results, the glass allowed a controlled amount of heat to emit in various conditions (room temperature – above 70°C), proving its ability to react dynamically to changing weather conditions. New glass regulates both heating and cooling Windows are one of the key components in a building’s design, but they are also the least energy-efficient and most complicated part. In the United States alone, window-associated energy consumption (heating and cooling) in buildings accounts for approximately four percent of their total primary energy usage each year according to an estimation based on data available from the Department of Energy in the US. While scientists elsewhere have developed sustainable innovations to ease this energy demand - such as using low emissivity coatings to prevent heat transfer and electrochromic glass that regulate solar transmission from entering the room by becoming tinted - none of the solutions have been able to modulate both heating and cooling at the same time, until now. The principal investigator of the study, Dr. Long Yi of the NTU School of Materials Science and Engineering (MSE) said, “Most energy-saving windows today tackle the part of solar heat gain caused by visible and near-infrared sunlight. However, researchers often overlook the radiative cooling in the long-wavelength infrared. While innovations focusing on radiative cooling have been used on walls and roofs, this function becomes undesirable during winter. Our team has demonstrated for the first time a glass that can respond favorably to both wavelengths, meaning that it can continuously self-tune to react to a changing temperature across all seasons.” As a result of these features, the NTU research team believes their innovation offers a convenient way to conserve energy in buildings since it does not rely on any moving components, electrical mechanisms, or blocking views, to function. To improve the performance of windows, the simultaneous modulation of both solar transmission and radiative cooling are crucial, said co-authors Professor Gang Tan from The University of Wyoming, USA, and Professor Ronggui Yang from the Huazhong University of Science and Technology, Wuhan, China, who led the building energy-saving simulation. “This innovation fills the missing gap between traditional smart windows and radiative cooling by paving a new research direction to minimize energy consumption,” said Prof Gang Tan. The study is an example of groundbreaking research that supports the NTU 2025 strategic plan, which seeks to address humanity’s grand challenges on sustainability and accelerate the translation of research discoveries into innovations that mitigate human impact on the environment. Innovation useful for a wide range of climate types As a proof of concept, the scientists tested the energy-saving performance of their invention using simulations of climate data covering all populated parts of the globe (seven climate zones). The team found the glass they developed showed energy savings in both warm and cool seasons, with an overall energy-saving performance of up to 9.5%, or ~330,000 kWh per year (estimated energy required to power 60 households in Singapore for a year) less than commercially available low emissivity glass in a simulated medium-sized office building. The first author of the study Wang Shancheng, who is a Research Fellow and former Ph.D. student of Dr. Long Yi, said, “The results prove the viability of applying our glass in all types of climates as it is able to help cut energy use regardless of hot and cold energy-saving seasonal temperature fluctuations. This sets our invention apart from current energysaving windows which tend to find limited use in regions with less seasonal variations.” Moreover, the heating and cooling performance of their glass can be customized to suit the needs of the market and region for which it is intended. “We can do so by simply adjusting the structure and composition of special nanocomposite coating layered onto the glass panel, allowing our innovation to be potentially used across a wide range of heat-regulating applications, and not limited to windows,” Dr. Long Yi said. Providing an independent view, Professor Liangbing Hu, Herbert Rabin Distinguished Professor, Director of the Center for Materials Innovation at the University of Maryland, USA, said, “Long and co-workers made the original development of smart windows that can regulate the near-infrared sunlight and the long-wave infrared heat. The use of this smart window could be highly important for building energy-saving and decarbonization.” For more information, visit: https://www.ntu.edu.sg/news/detail/energy-saving-glass-self-adapts-to-heating-and-cooling-demand