Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1992-08-06
1994-05-10
Kight, III, John
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
528125, 528126, 528128, 528172, 528173, 528179, 528188, 528192, 528220, 528229, 528350, 528351, 528392, 522 63, 522 65, 522 78, 524600, 430270, C08G 6926, C08G 7312
Patent
active
053108620
ABSTRACT:
A photosensitive polyimide precursor composition containing as main ingredients a poly(amic acid) wherein at least one molecular end is esterified with an alcohol, a compound containing carbon-carbon unsaturation having photoreactivity, and a photopolymerization initiator.
The photosensitive polyimide precursor composition of the present invention can be prepared without the formation of any harmful by-product. When film formed from this composition is masked for patterning and then subjected to exposure and development using a developer, the amount of exposed portion dissolved in the developer until unexposed portion is dissolved off by the developer, is small and so it is possible to obtain a thick pattern. Further, by heat-treating this pattern, there can be obtained a thick polyimide pattern.
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Asano Masaya
Eguchi Masuichi
Nomura Hideshi
Hampton-Hightower P.
Kight III John
Miller Austin R.
Toray Industries Inc.
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