Patent ID: 9449879
Filing Date: 2016-09-20
CPC Classification: B23K,H01L

Claim Text:
1. A method of severing a semiconductor device composite comprising a carrier having a main surface and a semiconductor layer sequence arranged on the main surface, wherein the carrier comprises a semiconductor material or a ceramics material; a metal layer is arranged on a side of the carrier remote from the semiconductor layer sequence; the semiconductor layer sequence is fixed to the carrier by a bonding layer; a separating trench is formed in the semiconductor device composite by a first laser cut such that the separating trench only partially severs the semiconductor device composite in a vertical direction running perpendicular to the main surface; the semiconductor device composite is severed completely along the separating trench with a severing cut with a laser; a second laser cut is made along the separating trench between the first laser cut and the severing cut, the second laser cut only removing material of the carrier; and side faces of the separating trench are covered with waste formed in the second laser cut.