Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1996-03-14
1997-11-11
Yoon, Tae
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
524879, 528353, 528188, 528229, 523160, 427282, 101114, 101129, C08L 7908, C08G 6926, B41M 112, B05D 132
Patent
active
056865252
ABSTRACT:
A polyimide precursor composition which is produced by (i) providing a polyamide acid solution obtained by reacting an aromatic tetracarboxylic acid component and a diamine component in the presence of an oxygen-containing solvent and (ii) subjecting said polyamide acid solution to heat treatment. The polyimide precursor composition exhibits a desirable apparent viscosity and a desirable thixotropic property and it excels in film forming ability, and because of this, it enables the formation a high quality relief pattern film with no defect and which excels in form retention by way of the screen printing. Further, the polyimide precursor composition is extremely suitable for the formation of a relief pattern by way of the screen printing in production of electronic, electric, optical, or precision devices, wherein the relief pattern is required to have a reduced dielectric constant and a reduced residual stress and to have a sufficient heat resistance, moisture resistance, physical strength, and chemical stability.
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Hasegawa Seiji
Maruta Masamichi
Moroi Yoshihiro
Nanai Hidehisa
Takahashi Hiroshi
Central Glass Company Ltd.
Yoon Tae
LandOfFree
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