| 摘要 |
PURPOSE:To obtain varnish of sufficient conductivity and high stability, by incorporating a solution of polyimide-based polymer precursor with amino group- contg. compound and metallic powder. CONSTITUTION:The objective varnish can be obtained by incorporating (A) a solution of polymer constituted mainly by structural unit of formula (R1 is tri- or tetravalent organic group having at least two carbon atoms; R2 is divalent organic group having at least two carbon atoms; n=1 or 2) with (B) a 1-15C compound carrying amino group and (C) metallic powder. The amounts to be incorporated for both components (B) and (C) are as follow: component (B) 0.5- 2 times equivalent (pref. 2/3-1.5 times equivalent) the whole carboxyl group in said polymer, component (C) 150-1,900 (pref. 250-1,000)g per 100g of said polymer.
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