Patent ID: 8759838
Filing Date: 2014-06-24
Classification: H01L

Abstract:
1. A package comprising: a conductive base plate including a CTE (coefficient of thermal expansion) control layer configured to be composed of compound material, and a heat conduction layer configured to be disposed on the CTE control layer and composed of Cu; wherein the CTE control layer is composed of a first compound material and a second compound material, a mixing ratio of the first compound material is increased with nearing the heat conduction layer, and a mixing ratio of the second compound material is increased with distance away from the heat conduction layer, along a thickness direction of the CTE control layer, wherein the mixing ratio between the first compound material and the second compound material in the CTE control layer is 20%/80% to 80%/20%, and the thickness of the CTE control layer is 0.4 mm to 0.8 mm.