METHOD FOR PATTERNING A SEQUENCE OF LAYERS AND SEMICONDUCTOR LASER DEVICE

摘要

The invention relates to a method for patterning a sequence of layers and to a semiconductor laser device. In said method, at least one trench (4) is created in the sequence of layers (10) by two plasma etching methods. The semiconductor laser device comprises a sequence of layers (10), which is formed using a semiconductor material, and two trenches (4) in the sequence of layers (10), said trenches laterally delimiting a ridge waveguide (30). Each of the trenches (4) is delimited on the side facing away from the ridge waveguide (30) by a region (A) of the sequence of layers (10).