Patent ID: 8946098
Filing Date: 2015-02-03
Classification: B23K,H01L

Abstract:
1. A device for a laser lift-off method for severing at least one layer from a carrier comprising: a laser that generates laser radiation; and at least one beam splitter; wherein the laser radiation is divided into at least two partial beams by the at least one beam splitter, the at least two partial beams are superimposed in an irradiation plane, the laser radiation is pulsed laser radiation and a pulse duration of the laser radiation is at most 50 ns, and an optical path length difference between the partial beams corresponds to at least 0.025 times and at most 0.25 times the pulse duration, the irradiation plane is provided such that a major side of the carrier remote from the layer is arranged therein, and an angle between the at least two partial beams at the irradiation plane is at least 1.0°.