Electrode patterning layer comprising polyamic acid or...

Active solid-state devices (e.g. – transistors – solid-state diode – Field effect device – Charge transfer device

Reexamination Certificate

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Details

C427S058000, C427S077000, C427S510000, C438S584000, C438S674000, C430S270100, C430S311000, C430S319000, C522S164000

Reexamination Certificate

active

08044441

ABSTRACT:
Provided is an electrode patterning layer used for forming an electrode pattern of any optional shape depending on the difference in wettability with an electrode-forming solution, the electrode patterning layer employing a polyimide type resin which is highly reliable as an electronic material. The electrode patterning layer is prepared by irradiating a layer comprising a polyamic acid having repeating units at the formula (1) or a polyimide obtainable by cyclodehydration of such a polyamic acid, with ultraviolet ray in a pattern shape:wherein A is a tetravalent organic group, B is a bivalent organic group, each of A and B may be of a single type or plural types, and n is a positive integer, provided that at least one type of A is a tetravalent organic group having an alicyclic structure.

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U.S. Appl. No. 12/302,031, filed Nov. 24, 2008, Maeda, et al.

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