Power module and fabrication method thereof

摘要: The invention provides a power module and fabrication method thereof. According to the method, high-temperature connection is performed on metal substrate substrate, an upper surface lower of both are planes, bent deformed towards direction so as respectively form curved surfaces protruding during process cooling from high temperature low temperature, forming processed plane. In provided by invention, direction, Compared with prior art, thereof have advantages that second welding material layer arranged between has larger average edge thickness, thermal stress borne reduced, reliability further improved basis favorable performance.