Patent ID: 7838107
Filing Date: 2010-11-23
Classification: C04B,H01L,H05K,Y10T

Abstract:
1. An aluminum/silicon carbide composite, which is prepared by infiltrating a substantially flat silicon carbide porous body with a metal containing aluminum as a main component, comprising: an aluminum alloy layer, which includes the metal containing aluminum as a main component, disposed on first and second principal surfaces of said silicon carbide porous body, wherein said first principal surface is bonded to a circuit plate and said second principal surface is a radiation surface, wherein the radiation surface of the silicon carbide porous body is formed into a convexly bowed shape, and the aluminum alloy layer on the radiation surface is machined to form a bow shape, which corresponds to the convex bow shape of the radiation surface of the silicon carbide porous body, after infiltration, wherein a change in the amount of bow is at most 30 μm per 200 mm in a major axis direction on the radiation surface, as between before and after heat treatment to remove distortion by processing, wherein an average thickness of the aluminum alloy layer on the first principal surface is x, and an average thickness of the aluminum alloy layer on the second principal surface is between x and (x-0.4x), wherein the average thickness of the aluminum alloy layer on the principal surface bonded to a circuit plate is from 0.1 to 0.3 mm, and wherein the difference of the thickness of the aluminum alloy layer in the principal surface bonded to a circuit plate is less than 0.1 mm.