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Ink Jet Printing Devices and Circuits

  • Steven Ready (a1), Ana Arias (a2), Sanjiv Sambandan (a3) and Robert Street (a4)

Abstract

For several years there have been many efforts to employ ink jet technologies in the fabrication of consumer electronics. The potential of displacing large and expensive pieces of electronic fabrication equipment and processes with seemingly appropriately scaled inexpensive alternatives is attractive. However, of course, the devil is in the details. Feature size, accuracy, registration and materials all have sever impacts on design rules, processing, performance and the types of devices appropriate to the technology. Here we present a look at some of the materials and deposition challenges along with solutions developed at PARC. The discussion will include the defining of printed features >5μm with ±1.5μm drop placement and layer to layer alignment accuracy, the materials characteristics of the generally complex functional fluids of interest required for reliable jetting and device performance. Examples of ink jet fabricated integrated circuits, working displays, imagers and RGB color filters for LCD displays will be shared.

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References

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1. Sirringhaus, et. al. “High-Resolution Inkjet Printing of All-Polymer Transistor Circuits” Science 290 2000
2. Wang, , et. al. Nat. Mat 2004
3. http://www.conductiveinkjet.com
4. Chabynic, et al. Appl. Phys. Lett. 88, 1 (2006)
5. Street, R. A. J App Phys in press (2006)
6. Arias, A. C., Journal of Macromolecular Science, Part C: Polymer Reviews 46 (1), 103 (2006).
7. Arias, A. C., Endicott, F., and Street, R. A., “Surface induced self-encapsulation of polymer thin film transistorsAdv. Mater. 2006 November; 18 (21): 29002904.
8. Malvern Instruments (http://www.malvern.com/)

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