Patent ID: 11936163
Assignee: CHANGCHUN INSTITUTE OF OPTICS, FINE MECHANICS AND PHYSICS
Field: Optics (Instruments)
Classification: CPC H | IPC H

Claim 0:
1. Method of fabricating a radiation emitter (100) comprising the steps of
fabricating a layer stack (10) that comprises a first reflector (12), at least one intermediate layer (21-24), an active region (13), and a second reflector (14);
locally oxidizing the at least one intermediate layer (21-24) and thereby forming at least one unoxidized aperture (40) in the at least one intermediate layer (21-24); and
locally removing the layer stack (10), and thereby forming a mesa (M), wherein the mesa (M) comprises the first reflector (12), the at least one unoxidized aperture (40), the active region (13), and the second reflector (14);
wherein before or after locally removing the layer stack (10) and forming the mesa (M) the following steps are carried out:
forming at least a first unoxidized aperture (40) and at least a second unoxidized aperture (40) inside the intermediate layer (21-24) according to the following steps:
vertically etching blind holes (30) inside the layer stack (10), wherein the blind holes (30) vertically extend at least to the intermediate layer (21-24) and expose the intermediate layer (21-24); and
oxidizing sections of the intermediate layer (21-24) via the blind holes (30) and thereby forming said apertures (40) inside the intermediate layer (21-24);

etching a continuous trench (TR) inside the layer stack (10), said trench (TR) separating and defining at least a first portion (M1) of the mesa (M) and at least a second portion (M2) of the mesa (M), wherein the trench (TR) severs the at least one intermediate layer (21-24) and separates the first and second unoxidized apertures (40) such that the first unoxidized aperture (40) is located in the first portion (M1) of the mesa (M) and the second unoxidized aperture (40) is located in the second portion (M1) of the mesa (M), wherein the continuous trench also separates the active region (13); and
fabricating an individual electrical contact (61A, 61B) for each of the portions (M1, M2).