Abstract

A mask-less and selective printing of conductor patterns is of significant importance for all display applications. Printing on structured surfaces such as microlenses or gratings is a challenge. Typically used processes require thermal curing to achieve the conductivity. This limits the applicability to flexible display applications where low temperature processes are preferred, especially for roll to roll (R2R) scale up. We have used an approach of printing a catalyst containing ink, followed by an electroless plating of copper. This paper details the processes, microstructures and properties of highly conductive and printed copper on patterned flat surfaces as well as structures with micro-optic lens structures. A process has been developed on surfaces with lens structures where the conductor is required to be in the valley between the lenses and between structures with narrow lines and narrow pitch. This is a low temperature process, requiring a plating bath temperature of < 45°C and thus very compatible with flexible substrates and R2R processing.

© 2011 IEEE

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  1. D. Van Ostrand, B. Cox, "Time multiplexed optical shutter," SID Symp.Dig. (2008) pp. 1054-1057.
  2. B. Cox, M. Selbrede, "Inside FPD: UniPixel's TMOS display technology," Nikkei Microdevices 43-47 (2007).
  3. C. J. Curtis, M. van Hest, A. Miedaner, T. Kaydanova, L. Smith, D. S. Ginley, Multi layer inkjet printed contacts for silicon solar cells NREL/CP- 520-39902 (2006).
  4. O. Azucena, J. Kubby, D. Scarbrough, C. Goldsmith, "Inkjet printing of passive microwave circuitry," IEEE MTT-S Int. Microw. Symp. Dig. (2008) pp. 1075-1078.
  5. J. Y. Zhang, S. L. King, I. W. Boyd, Q. Fang, "VUV light-induced decomposition of palladium acetate films for electroless copper plating," Appl. Surface Sci. 109/110, 487-492 (1997).
  6. R. Ramakrishnan, N. Saran, R. Petcavich, "Printed conductor patterning capabilities for displays and flexible circuits," Proc. 2010 Flexible Electron. Display Conf. (2010).

2007 (1)

B. Cox, M. Selbrede, "Inside FPD: UniPixel's TMOS display technology," Nikkei Microdevices 43-47 (2007).

1997 (1)

J. Y. Zhang, S. L. King, I. W. Boyd, Q. Fang, "VUV light-induced decomposition of palladium acetate films for electroless copper plating," Appl. Surface Sci. 109/110, 487-492 (1997).

Appl. Surface Sci. (1)

J. Y. Zhang, S. L. King, I. W. Boyd, Q. Fang, "VUV light-induced decomposition of palladium acetate films for electroless copper plating," Appl. Surface Sci. 109/110, 487-492 (1997).

Nikkei Microdevices (1)

B. Cox, M. Selbrede, "Inside FPD: UniPixel's TMOS display technology," Nikkei Microdevices 43-47 (2007).

Other (4)

C. J. Curtis, M. van Hest, A. Miedaner, T. Kaydanova, L. Smith, D. S. Ginley, Multi layer inkjet printed contacts for silicon solar cells NREL/CP- 520-39902 (2006).

O. Azucena, J. Kubby, D. Scarbrough, C. Goldsmith, "Inkjet printing of passive microwave circuitry," IEEE MTT-S Int. Microw. Symp. Dig. (2008) pp. 1075-1078.

R. Ramakrishnan, N. Saran, R. Petcavich, "Printed conductor patterning capabilities for displays and flexible circuits," Proc. 2010 Flexible Electron. Display Conf. (2010).

D. Van Ostrand, B. Cox, "Time multiplexed optical shutter," SID Symp.Dig. (2008) pp. 1054-1057.

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