Patent ID: 8129016
Filing Date: 2012-03-06
Classification: H01L,H02N,Y10T

Abstract:
1. A substrate supporting member comprising: a plate-shaped ceramic body having a surface serving as a substrate supporting surface; a plate-shaped composite material body joined to a surface of the ceramic body opposite to the substrate supporting surface with a joint material made of aluminum alloy and having a thickness of 50 to 200 μm interposed therebetween, the plate-shaped composite material body being made of porous ceramic with pores filled with metal, and the composite material body having a porosity of more than 0% and not more than 5%; and a metallic plate joined to a surface of the composite material body opposite to the surface joined to the ceramic body with a joint material made of aluminum alloy and having a thickness of 50 to 200 μm interposed therebetween, wherein either wherein a difference in thermal expansion coefficient between the metallic plate and the ceramic body is not more than 1.0×10 wherein the porous ceramic of the composite material body is alumina, sialon or silicon carbide, and wherein the metallic plate has a thickness of not less than 0.2 mm and not more than 3 mm.