Patent ID: 9236710
Filing Date: 2016-01-12
CPC Classification: H01L,H01S

Claim Text:
1. A method of manufacturing a semiconductor laser element comprising: preparing a wafer containing a plurality of semiconductor laser elements each having, in order from a lower surface side of the wafer, a substrate and a semiconductor structure having an optical waveguide; forming a plurality of first grooves on at least one of an upper surface and a lower surface of the wafer, each of the first grooves being spaced apart from the optical waveguide and extending in a first direction intersecting the optical waveguide in a plan view; forming a plurality of second grooves on the one of the upper surface and the lower surface of the wafer having the first grooves formed thereon, each of the second grooves extending in a second direction intersecting the first direction, with the first direction and the second direction being neither coincided with each other nor parallel to each other, and each of the second grooves having a smooth surface compared with the first grooves; dividing the wafer along the first grooves to obtain a plurality of laser bars by cleaving the wafer so that a cleavage line advances in the order of one of the first grooves, one of the second grooves, and the optical waveguide; and dividing the laser bars in a direction intersecting an extending direction of the first grooves to obtain a plurality of the semiconductor laser elements.