Patent ID: 11881684
Assignee: NICHIA CORPORATION
Field: Optics (Instruments)
Classification: CPC H | IPC H

Claim 7:
8. A method for manufacturing a semiconductor laser element, the method comprising:
forming an n-side semiconductor layer on or above a substrate;
forming an active layer on or above the n-side semiconductor layer;
forming an undoped first part directly abutting an upper face of the active layer, the undoped first part comprising at least one semiconductor layer;
forming an electron barrier layer directly abutting an upper face of the uppermost layer, the electron barrier layer being doped with a p-type impurity and having a band gap energy that is larger than a band gap energy of the first part;
forming a second part directly abutting an upper face of the electron barrier layer, the second part comprising at least one p-type semiconductor layer doped with a p-type impurity;
forming a p-electrode directly abutting an upper face of the second part; and
forming a ridge projecting upward by partially removing a portion of a p-side semiconductor layer including a portion of the first part, a portion of the electron barrier layer, and a portion of the second part; wherein:
in said forming the second part, the second part is formed so as to have a total thickness that is smaller than a total thickness of the first part; and
in said forming the ridge, the p-side semiconductor layer is partially removed such that a lower end of the ridge is positioned at the first part.