Patent ID: 8809690
Filing Date: 2014-08-19
Classification: B05D,B32B,B44C,H05K,Y10T

Abstract:
1. A circuit subassembly comprising a bond ply that does not include a glass or other fabric and comprises: a first outer layer comprising a thermosetting composition and a filler composition; a second outer layer comprising a thermosetting composition and a filler composition that is of the same type as that of the first outer layer; and an intermediate layer disposed between the first and the second outer layers, and comprising a thermosetting composition and a filler composition that is of the same type as the first and second outer layers, wherein the thermosetting composition of the intermediate layer has a degree of cure that is greater than a degree of cure for each of the thermosetting compositions of the first and the second outer layers and wherein the amount of filler is 10 to 60 volume percent.