Patent ID: 8273993

Claim:
An electronic component module, comprising: a circuit board including a ceramic substrate having a first principal surface and a second principal surface opposite to the first principal surface, a first metal plate bonded to the first principal surface of the ceramic substrate, and a second metal plate bonded to the second principal surface of the ceramic substrate; and an electronic component bonded to at least one of the first and the second metal plates via a first brazing material layer, wherein the electronic component is operable at a temperature of at least 125° C., wherein the first brazing material layer is formed of a brazing material having a melting point in a range of 575° C. to 730° C., and the melting point is higher than an operating temperature of the electronic component, and wherein a ratio of a thickness of the first metal plate to a thickness of the second metal plate is 50% or more and 200% or less.