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

Claim 0:
1. A semiconductor laser element comprising:
an n-side semiconductor layer formed of a nitride semiconductor;
an active layer disposed on or above the n-side semiconductor layer and formed of a nitride semiconductor;
a p-side semiconductor layer disposed on the active layer, formed of a nitride semiconductor, and comprising:
an undoped first part directly abutting an upper face of the active layer and comprising at least one semiconductor layer,
an electron barrier layer directly abutting an upper face of the first part, containing a p-type impurity, and having a band gap energy that is larger than a band gap energy of the first part, and
a second part directly abutting the upper face of the electron barrier layer and comprising at least one p-type semiconductor layer containing a p-type impurity; and

a p-electrode directly abutting the upper face of the second part; wherein:
at least a portion of the p-side semiconductor layer forms a ridge projecting upward and having an upper face and a lower end;
a total thickness of the second part is smaller than a total thickness of the first part; and
the lower end of the ridge is positioned at the first part.