Carolyn Ellinger | Eastman Kodak: What specific inorganic passivation is used on the copper surface, and how does it balance stability and optical neutrality?
00:02:33 - 00:02:44
Other snippets from this talk
Summary of the clip:
What specific inorganic passivation is used on the copper surface, and how does it balance stability and optical neutrality?
Kodak utilizes electroless deposition of copper as its metal of choice for printed electronics applications. Following the copper deposition, an inorganic passivation layer is applied to the copper surface. This passivation layer serves a dual purpose: it enhances the stability of the copper layer and provides a neutral color.
The stability is crucial to prevent oxidation and degradation of the copper, ensuring long-term performance of the printed electronic devices. The neutral color is particularly important for optical applications, where the color of the metal layer can affect the overall optical properties of the device. The speaker notes that they do "a lot of optical applications".
The inorganic passivation layer is carefully selected to balance these two requirements. The specific composition of the passivation layer is not disclosed, but it is designed to provide effective protection against environmental factors while minimizing its impact on the optical properties of the copper layer. This allows Kodak to produce high-performance printed electronic devices with both excellent electrical and optical characteristics.
In this short video, you can learn:
* The use of electroless copper deposition in Kodak's process.
* The purpose of the inorganic passivation layer on the copper surface.
* The dual benefits of stability and neutral color provided by the passivation layer.
📋 **Clip Abstract** This segment details Kodak's use of electroless copper deposition and the application of an inorganic passivation layer to enhance stability and maintain neutral color for optical applications.
🔗 Link in comments 👇
#ElectrolessCopperDeposition, #InorganicPassivation, #CopperStability, #OpticalNeutrality, #PrintedElectronics, #OpticalDevices
This is a highlight of the presentation:
Flexo for High-Resolution Roll-to-Roll Manufacturing
More Highlights from the same talk.
00:00:24 - 00:00:29
How does the interplay between design resolution and printing resolution impact the final feature size on the substrate?
How does the interplay between design resolution and printing resolution impact the final feature size on the substrate?
Kodak's flexographic printing capabilities enable high-resolution patterning, starting with a design resolution of 12,800 DPI, which translates to two-micron pixels in the design phase. However, the resolution achievable on the substrate after printing varies, typically ranging from six to thirty microns. This discrepancy is primarily influenced by the characteristics of the inks used in the printing process.
The speaker emphasizes that the final feature size on the substrate is not solely determined by the initial design resolution. Ink properties, such as viscosity, surface tension, and wetting behavior, play a crucial role in how the ink spreads and adheres to the substrate during printing. Different inks will exhibit varying degrees of spreading, leading to the observed range of six to thirty microns.
Therefore, achieving the desired feature size requires careful consideration of both the design resolution and the ink properties. Optimizing the ink formulation and printing parameters is essential to minimize spreading and maintain the fidelity of the printed features. This highlights the importance of a holistic approach that considers the entire printing process, from design to material selection, to achieve the desired outcome.
In this short video, you can learn:
* The design resolution capabilities of Kodak's flexographic printing.
* The range of feature sizes achievable on the substrate.
* The influence of ink properties on the final printed resolution.
📋 **Clip Abstract** This segment discusses the resolution capabilities of Kodak's flexographic printing, highlighting the difference between design resolution (12,800 DPI) and achievable feature sizes on the substrate (6-30 microns), emphasizing the role of ink properties.
🔗 Link in comments 👇
#FlexographicPrinting, #DesignResolution, #PrintingResolution, #InkProperties, #PrintedElectronics, #AdvancedDisplays
00:05:06 - 00:05:13
What are the key factors that enable Kodak to achieve both low sheet resistance and high optical transparency in their roll-to-roll manufacturing process?
What are the key factors that enable Kodak to achieve both low sheet resistance and high optical transparency in their roll-to-roll manufacturing process?
Kodak's roll-to-roll manufacturing process is capable of achieving a sheet resistance of less than one ohm per square while maintaining greater than 85% optical transparency. This performance is attributed to a combination of factors, including the materials used, the printing techniques employed, and the design of the conductive patterns. The speaker highlights that these results are not unusual for their organization.
The use of a geometric mesh pattern, as mentioned earlier in the presentation, is crucial for achieving high optical transparency. By creating a network of conductive lines with open spaces in between, light can pass through the substrate, resulting in a transparent conductive film. The specific geometry of the mesh, including the line width and pitch, can be optimized to achieve the desired balance between conductivity and transparency.
Furthermore, the electroless deposition of copper, combined with the inorganic passivation layer, contributes to both the low sheet resistance and the long-term stability of the conductive film. The speaker notes that while lower sheet resistance is possible, it would come at the cost of optical transparency, indicating a trade-off that must be carefully considered based on the specific application requirements.
In this short video, you can learn:
* The typical sheet resistance and optical transparency values achieved by Kodak.
* The role of geometric mesh patterns in achieving high transparency.
* The trade-off between sheet resistance and optical transparency.
📋 **Clip Abstract** This segment discusses Kodak's ability to achieve low sheet resistance (less than 1 ohm/sq) and high optical transparency (greater than 85%) in their roll-to-roll process, highlighting the importance of geometric mesh patterns.
🔗 Link in comments 👇
#RollToRollManufacturing, #GeometricMesh, #ElectrolessCopper, #TransparentConductors, #FlexibleElectronics, #TouchscreenDisplays