Patent ID: 9637648
Date: 2017-05-02
CPC Classifications: C08G,C08K,C09D,H01B

Claim:
1. A polymer thick film copper conductor composition comprising: (a) 60 to 95 wt % copper powder possessing particles with an average particle size of 0.2 to 10 μm and a surface area/mass ratio in the range of 0.2 to 3.0 m (b) 4 to 35 wt % organic medium comprising (c) 0.0 to 1 wt % viscosity stabilizing agent comprising a carboxylic acid containing compound; in the absence of a reducing agent and wherein the ratio of the weight of the copper powder to the weight of the polyimide resin is at least 13 and wherein the wt % are based on the total weight of the polymer thick film copper conductor composition.