Patent ID: 8898892

Claim:
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 a positioning unit on a main body of the heat-dissipating device and on the other one of the copper layers; retaining the ceramic-copper plate on the main body of the heat-dissipating device relative to each other through the use of the positioning unit such that the ceramic-copper plate is in contact with the main body of the heat-dissipating device; and conducting a heat treatment so as to bond the ceramic-copper plate to the main body of the heat-dissipating device, wherein the positioning unit includes first positioning elements formed on the other one of the copper layers, and second positioning elements respectively engaging the first positioning elements and formed on the main body of the heat-dissipating device, one of a pair of the first and second positioning elements which engage each other being formed as an indentation, the other one of the pair of the first and second positioning elements being formed as a protrusion.