Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1990-07-19
1991-06-18
Bowers, Jr., Charles L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
528350, 528352, 430270, 430283, 430287, C08G 6926, G03C 1725
Patent
active
050250884
ABSTRACT:
The present invention here disclosed is directed to a photosensitive polymer having an inherent viscosity of 0.1 to 5 dl/g and represented by the general formula ##STR1## wherein R.sup.1 is independently a trivalent or tetravalent carbon cyclic aromatic group or heterocyclic group; R.sub.2 is independently an aliphatic group having at least 2 carbon atoms, an alicyclic group, an aromatic aliphatic group, a carbon cyclic aromatic group, a heterocyclic group or a polysiloxane group; R.sub.3 and R.sub.4 are CH.sub.2 --CH.dbd.CH.sub.2 ; m is 1 or 2; n is 0 or 1; and m and n satisfy 1.ltoreq.m+n.ltoreq.2.
The photosensitive polymer of the present invention is applicable as electronic materials such as passivation films of semiconductors and print circuits.
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Kunimune Kouichi
Maeda Hirotoshi
Bowers Jr. Charles L.
Chisso Corporation
Chu John S. Y.
Philpitt Fred
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