Patent ID: 7777216
Filing Date: 2010-08-17
Classification: B82Y,H01S,Y10S

Abstract:
1. A method of fabricating a semiconductor device, the method comprising the steps of: forming a predetermined semiconductor multilayer which includes at least a quantum well active layer on a semiconductor substrate; forming a disorder-suppressing film on a first portion of the surface of said semiconductor multilayer; forming a disorder-enhancing film on a second portion of the surface of said semiconductor multilayer, said disorder-enhancing film being made of the same dielectric material as said disorder-suppressing film and having a lower refractive index than said disorder-suppressing film in order that catastrophic optical damage (COD) to the laser type semiconductor device is reduced; performing thermal treatment of a multilayer body containing said semiconductor multilayer, said disorder-suppressing film and said disorder-enhancing film, thus disordering said quantum well layer under said disorder-enhancing film so as to have an increased band gap energy higher than that of said quantum well layer under said disorder-suppressing film; and cleaving said multilayer body at nearly the central part of said second portion.