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IDS | High Output Rate Aerosol Printing for High Conductivity Printed Electronics | June 2022

This is an auto transcriped version of the presentation without any human control.

Speaker 200:00:04Yes, we can hear you. We can see you and your slides are perfect. So you have your 5 minutes now.

Speaker 100:00:09Okay. Thank you very much. So today we're going to talk about high output, aerosol printing for high conductivity, printed electronic applications. The first thing we're going to talk about is sort of the sweet spot for aerosol printing, the traditional sweet spot. And then we'll talk a little bit about what we're doing to enhance the aerosol printing capability and expand it into other areas. So the slides here show the typical sweet spot for for aerosol printing is fine printing of fine lines. A lot of effort for aerosol printing has been focused, no pun intended, on printing of very fine features. So we can reliably print features down to 15 microns. And with our and a lot of our customers actually have printed features at ten microns or less. The image on the right shows gold printed conductors, they're 20 microns wide at 100 micron, and they have really good line edge quality. I can show you some better higher magnification images of the type of image quality you would expect for our aerosol printing. Another unique advantage that we have for the aerosol printing is that we have a large working distance between the nozzle and the substrate that we're printing on. This really makes aerosol printing unique or provides a unique advantage over a lot of the other digital printing technology used used in printing printed electronics. So the printing stand up distance can be anywhere from 2 to 5 millimeters typically. And customers even recently have demonstrated ten millimeter stand up distance with good with good print quality. And it's one of the misnomers that we have talked about focusing of the aerosol stream, but in fact, it's actually largely carbonated as opposed to focus. So the large stand of distance gives us the ability to print over features such as the one shown here on the left, on the right, the this is the 3D printed dome structure. And we printed a strain gauge on here for one of our projects. And we did this with 3D three axis motion control for motion control, sorry for all the pop ups. And then I'm going to step into what we're doing now to really enhance our output rate as we start to kind of move more towards production applications or being able to print larger features and how we're doing that. One application that we're looking at is replacing wire bonding with the formation of stud months with printed forms instead. This is particularly useful for people in the medical field where they're making medical devices or high performance electronic applications, where the volume of of a single design is small or the throughput is anyway high make, high mix, low volume applications and so on. The image on the ratio is one of the stud pumps that we printed recently, and this is still under development, but the features about 40 microns tall and 70 microns wide on the bottom. And we've developed a unique formulation that allows us to kind of print these features with minimal overspray and get really good definition. And none of these bumps would generally be printed on to the conductive or the circuit substrate, and then the integrated circuit would be flip flip chip bonded to using the bumps. Part of what we've done recently, we've actually looked at our ink formulations and we've been able to increase our output rate by a factor of about 17 times by modifying and working with the writings that are able to be pretty aerosolized with viscosity, but also be able to output our printing technology. And then we also are some of the things we're looking at are at the high flow rates is also some better focusing capabilities. The image on the right shows a line we recently printed using some some advances in our focusing capabilities. We were able to output these printed lines at five millimeters. Print speed is five millimeters per second, a single pass, and the line is about 15 microns tall and about 90 microns wide at the base. And we're able to demonstrate using this technique also to print features up to 200 microns. And this is a significant advancement and our output rate material for a volumetric material output rate, I think this was like 5 million, 5 million cubic microns per minute, I believe was the calculation. We're also continuing to make sure that the performance of the Printheads remain consistent. The data on the right shows the typical tests that we're using on our practice for qualification, and it shows that the average deal this shows for a 70. Micron private line. We have an average standard standard deviation of the printed line with about three 3% over the eight hour period. And the tolerance on that is about 5%. The lines in the upper ratio of the lines that were printed for this eight hour test, the unique design for a print head really avoids clogging. And what was typically known is satellites are largely eliminated with the printing technology. The images on the lower right show the printed types of printed line edge quality you expect with the nano aerosol printing technology. In contrast on the image on the right shows, aerosol printing on a different technology from a different company that was more traditional. It was original aerosol printing technology. So our technology, with the way we're focusing using multiple air than they.

Speaker 200:05:53Have one minute just just an issue.

Speaker 100:05:56All right. Thank you. Allows us to avoid overspray and provides consistent, reliable, long term printing performance. Because of the high output rate, we're able to print features like the one being shown on the video on the right. So we're able to print features that have substantial thickness at a high output rate. This is a coil that's being printed on an embedded medical device that's being used as a stimulator. And so the coils actually have 20 or 20 ohms. They take about 10 minutes to print and they're used for both power transfer and telemetry for the embedded device. So you basically can power remotely and read the signals back from a patient. So between the medical embedded device and the step bumping application, these are two applications that we're looking at for the higher output rate, the printing technology. Thank you very much.

Speaker 200:06:48Thank you. Thank you for the presentation, David, and thank you for joining us. As always. It's really interesting to learn about the capabilities of aerosol printing and amazing how what kind of features we'll.


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