Patent ID: 7059042
Filing Date: 2006-06-13
Classification: H01L,H05K,Y10T

Abstract:
1. A method of manufacturing a thermally conductive circuit board with a grounding pattern connected to a heat sink, the method comprising: (1) placing a metal pole in a desired place in an electrically conductive heat sink; and (2) superposing a lead frame as a wiring pattern, a sheet-like thermally conductive resin composition made of 70 to 95 wt. % inorganic filler and 5 to 30 wt. % resin composition containing at least uncured thermosetting resin, and the electrically conductive heat sink sequentially with a portion of the metal pole protruding from the electrically conductive heat sink facing the sheet-like thermally conductive resin composition, and heating and compressing them, so that (A) the metal pole is connected to the lead frame and the sheet-like thermally conductive resin composition is allowed to fill up to a surface of the lead frame or (B) a surface of the metal pole is allowed to be flush with the surface of the lead frame to be a part of the wiring pattern and the sheet-like thermally conductive resin composition is allowed to fill up to the surface of the lead frame, and the thermosetting resin contained in the sheet-like thermally conductive resin composition is cured.