Patent ID: 9608401
Date: 2017-03-28
CPC Classifications: H01S

Claim:
1. A method for producing semiconductor laser elements comprising the steps of: A) providing at least one carrier composite having a plurality of carriers for the semiconductor laser elements; B) providing at least one laser bar having a plurality of semiconductor laser diodes which comprise a common growth substrate and a semiconductor layer sequence grown thereon, wherein the semiconductor layer sequence comprises an n-type side, a p-type side and an active zone located therebetween and the n-type side faces towards the common growth substrate; C) generating predetermined breaking points on a substrate underside of the common growth substrate, said substrate underside facing away from the semiconductor layer sequence; D) attaching the laser bar to a carrier upper side of the carrier composite, wherein the substrate underside of the common growth substrate faces towards the carrier upper side and wherein the attachment is performed at an attachment temperature and is followed by a cooling process, by which a temperature of the laser bar and of the carrier composite is reduced below the attachment temperature; and E) singulating into the semiconductor laser elements, wherein steps B) to E) are performed in the indicated sequence, wherein the carrier composite is manufactured from silicon, the common growth substrate is a GaAs substrate, the semiconductor layer sequence is based on AlInGaAsP, wherein in step D) the laser bar is attached to the carrier composite by soldering, the predetermined breaking points are produced in the common growth substrate in step C) by means of scribing, during the cooling process in step D) the temperature of the laser bar and of the carrier composite is reduced by at least 200° C., and prior to step E) during cooling in step D) the laser bar is simulated at least partially into the semiconductor laser diodes, wherein the carrier composite is retained.