Patent ID: 8660157

Claim:
A method of bonding a semiconductor substrate to a metal substrate without the use of any intermediate joining or soldering layer between the two substrates, the method comprising the steps of: providing a metal substrate, providing a semiconductor substrate made from substantially Gallium Arsenide (“GaAs”), fabricating on the GaAs substrate a laser diode or laser diode array, lapping and polishing a surface of the GaAs substrate and a surface of the metal substrate so that each surface has a predetermined level of smoothness and a predetermined level of flatness, cleaning the surfaces of the semiconductor and metal substrates using suitable solutions for the semiconductor and metal substrates so as to remove from the surfaces of the semiconductor and metal substrates particulates of a predetermined size, contaminants and residues, removing from the surfaces of the semiconductor and metal substrates any native oxides using appropriate solutions for the semiconductor and metal substrates, rinsing and drying the surfaces of the semiconductor and metal substrates and pre-bonding said surfaces together by physically contacting said surfaces together with a predetermined level of force, and annealing the semiconductor and metal substrates for a predetermined period of time and a predetermined elevated temperature to thereby bond the semiconductor and metal substrates together.