Patent ID: 7338827
Filing Date: 2008-03-04
Classification: H01S

Abstract:
1. A method for fabricating nitride semiconductor lasers, the method comprising the steps of: (A) providing a nitride semiconductor substrate, which will be split into a plurality of chip substrates, which includes a plurality of device portions that will function as the respective chip substrates when the substrate is split and a plurality of interdevice portions that connect the device portions together, and in which the average thickness of some of the interdevice portions, which extend parallel to a resonant cavity length direction, is smaller than the thickness of the other portions of the nitride semiconductor substrate; (B) defining a masking layer, which has striped openings over the device portions, on the upper surface of the nitride semiconductor substrate; (C) selectively growing nitride semiconductor layers on portions of the upper surface of the nitride semiconductor substrate, which are exposed through the openings of the masking layer; and (D) subjecting the nitride semiconductor substrate to a first cleavage process perpendicularly to the resonant cavity length direction and then subjecting the nitride semiconductor substrate to a second cleavage process along the interdevice portions that extend parallel to the resonant cavity length direction, thereby forming a plurality of nitride semiconductor devices on the respectively split chip substrates, wherein the step (A) includes the steps of: and the step (B) includes the step of: