Patent ID: 7550304
Filing Date: 2009-06-23
Classification: B82Y,H01S

Abstract:
1. A method for manufacturing a semiconductor laser element comprising: forming a semiconductor laminated structure, having an active layer, on a substrate; etching said semiconductor laminated structure to form a mesa having side surfaces; exposing the side surfaces of the mesa to an oxygen-containing ambient, whereby an oxide layer is formed on the side surfaces of the mesa; removing a first part of the oxide layer from the side surfaces of the mesa at a temperature lower than a critical temperature at which bonds between atoms of the oxide layer become stronger, by etching with a gas; thereafter, removing a second, remaining part of the oxide layer from the side surfaces of the mesa at a temperature higher than the critical temperature, by etching with a gas; and forming a burying layer coating the side surfaces of the mesa after removing the oxide layer from the side surfaces of the mesa.