Patent ID: 6534190
Filing Date: 2003-03-18
Classification: C22C,H01L,Y10T

Abstract:
A substrate for mounting a semiconductor device, comprising:a substrate material for mounting a semiconductor device, said substrate material comprising an aluminum/silicon carbide (Alâ€”SiC) composite alloy comprising an Alâ€”SiC alloy composition having an aluminum or aluminum alloy matrix and granular silicon carbide particles dispersed therein wherein said granular silicon carbide particles are dispersed in a concentration of from 10 to 70% by weight and are distributed substantially homogeneously such, that fluctuations of the silicon carbide concentration within the Alâ€”SiC composite alloy are less than 1% by weight resulting in a thermal conductability of 100 W/mÃ—k or higher and a thermal expansion coefficient of 20Ã—10âˆ’6/degC. or lower, and a coating layer coated on a surface of the substrate.