Patent ID: 9373939
Filing Date: 2016-06-21
CPC Classification: H01S

Claim Text:
1. A method for manufacturing a semiconductor device comprising the steps of: growing a stacked semiconductor layer on a principal surface of a substrate, the stacked semiconductor layer including an active layer and a cladding layer; forming a mesa structure by etching the stacked semiconductor layer using a dry etching method, the mesa structure extending in a [011] direction; and forming a buried layer on a side surface of the mesa structure and the principal surface of the substrate in a reactor of an organo-metallic vapor phase epitaxy apparatus while supplying a hydrogen chloride gas into the reactor, the buried layer being composed of an Fe-doped InP, wherein, in the step of forming the buried layer, the hydrogen chloride gas is supplied from the beginning of forming the buried layer, the buried layer has a first region and a second region, the first region is formed on a side surface of the active layer, the first region having a front surface of a (311)B plane, the second region is formed on the from surface of the first region, and the first region has a higher Fe concentration than that of the second region.