Patent ID: 8519273
Filing Date: 2013-08-27
Classification: B32B,C08K,C08L,C09D,C09J,C12Q,H05K,Y10T

Abstract:
1. A circuit subassembly, comprising a conductive layer; a dielectric layer formed from a thermosetting composition, wherein the thermosetting composition comprises, based on the total weight of the thermosetting composition: an adhesive layer disposed between and in contact with the conductive layer and the dielectric layer, wherein the adhesive comprises a poly(arylene ether) and a polybutadiene polymer, a polyisoprene polymer, or a combination thereof; wherein the circuit subassembly has a UL-94 rating of at least V-1; and wherein the circuit subassembly has a combined bromine and chlorine content of less than about 900 ppm; a water absorption of less than 0.5 percent after submersion in water at 23° C. for 24 hours; a xylene absorption of less than 2% by weight, after a test sample having dimensions of 2 inches ×2 inches ×20 mils is submerged in xylene at 23° C. for 24 hours; and an acid weight loss less of not more than 0.81% after submersion in 10 wt.% sulfuric acid at 70° C. for 20 minutes.