Patent ID: 8143530
Filing Date: 2012-03-27
Classification: B32B,H05K

Abstract:
1. A substrate for use in electronic packages comprising: a) a layer of copper-invar-copper (CIC) having an upper surface and a lower surface; b) a first layer of polytetrafluoroethylene (PTFE) disposed on said upper surface of said CIC layer; c) a second layer of PTFE disposed on said lower surface of said CIC layer; d) a top layer of etched copper foil having etched spaces disposed on said upper surface of said first PTFE layer; e) a bottom layer of etched copper foil having etched spaces disposed on said lower surface of said second PTFE layer; f) a first layer of liquid crystal polymer (LCP) having an upper surface and a lower surface disposed on said top layer of etched copper foil; g) a second layer of LCP having an upper surface and a lower surface disposed on said bottom layer of etched copper foil; h) a top external layer of etched copper foil disposed on said upper surface of said first and said second LCP layers; and i) bottom external layers of etched copper foil disposed on said lower surface of said first LCP layer and said second LCP layer, respectively.