Polyimide resin soluble in aqueous alkaline solution,...

Details Polyimide resin soluble in aqueous alkaline solution,... Polyimide resin soluble in aqueous alkaline solution,...

2007-08-21

2009-12-29

Chu, John S (Department: 1795)

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Radiation sensitive composition or product or process of making

C430S287100, C430S326000, C430S330000, C430S906000

Reexamination Certificate

active

07638259

ABSTRACT:
A polyimide resin, characterized in that the polyimide resin comprises three kinds of repeating units represented by the formula (1), and has a weight average molecular weight, reduced to polystyrene, of from 5,000 to 500,000, an acryl equivalent of from 400 to 3,000 g/eq, and a carboxylic acid equivalent of from 300 to 2500 g/eqwherein X is a tetravalent organic group, Y is a divalent organic group, Z is a divalent organic group, W is a divalent organic group having a polyorganosiloxane structure. The polyimide resin is suitable for preparing a patterned or non-patterned protective coating.

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