Patent ID: 8885683
Filing Date: 2014-11-11
Classification: B82Y,G02B,H01L,H01S

Abstract:
1. A process for forming a microstructure of a nitride semiconductor comprising: (1) preparing a semiconductor structure having a first layer and a second layer formed on a principal plane of the first layer, a hole being formed in the first layer and penetrating through the second layer, the first layer comprising a nitride semiconductor containing no Al, the second layer comprising a nitride semiconductor containing at least Al; (2) subjecting the semiconductor structure to heat treatment under a gas atmosphere including a nitrogen element after step (1) to form a crystal plane of the nitride semiconductor, on at least a part of a side wall of the hole; and (3) forming a third semiconductor layer comprising a nitride semiconductor on the second semiconductor layer after step (2) to cover the upper part of the hole.