Patent ID: 6358351
Filing Date: 2002-03-19
Classification: B32B,H01L,H05K,Y10S,Y10T

Abstract:
A method for manufacturing a thermally conductive substrate comprising:preparing a sheet comprising 70 to 95 weight parts of an inorganic filler and 5 to 30 weight parts of a resin composition containing a thermosetting resin, a hardener, and a hardening accelerator, wherein the sheet has a viscosity from 102 Pa s to 105 Pa s in a half hardened state or partially hardened state; contacting a lead frame with a surface of the sheet; molding the sheet at a temperature below the hardening temperature of the resin composition and at a pressure in the range of 10 Kg/cm2 to 200 Kg/cm2; embedding the lead frame into the sheet, wherein a surface of the lead frame is substantially coplanar with an opposite surface of the sheet; and hardening the resin composition by thermal pressing at a pressure up to 200 Kg/cm2.