Patent ID: 8549739
Filing Date: 2013-10-08
Classification: H01L,H05K,Y10T

Abstract:
1. A method of making a circuit board module suitable for supporting and dissipating heat from an electronic element, comprising: providing a ceramic-copper plate that includes a ceramic substrate and two copper layers formed on two opposite surfaces of the ceramic substrate; patterning one of the copper layers so as to form a copper pattern; providing a heat-dissipating device; providing an intermediate copper plate; providing a positioning unit on a main body of the heat-dissipating device, the other one of the copper layers, and the intermediate copper plate; retaining the intermediate copper plate between the ceramic-copper plate and the main body of the heat-dissipating device through the use of the positioning unit; and conducting a heat treatment so as to bond the intermediate copper plate to the ceramic-copper plate and the main body of the heat-dissipating device; wherein the positioning unit includes first positioning elements formed as protrusions on the other one of the copper layers, second positioning elements formed as protrusions on the main body of the heat-dissipating device, and through-holes formed in the intermediate copper plate, each of the through-holes engaging one of the first and second positioning elements.