Patent ID: 11929427
Assignee: VISUAL PHOTONICS EPITAXY CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A high ruggedness heterojunction bipolar transistor, comprising:
a substrate;
a sub-collector layer being on the substrate and comprising an N-type III-V semiconductor material;
a collector layer being on the sub-collector layer and comprising a III-V semiconductor material;
a base layer being on the collector layer and comprising a P-type III-V semiconductor material;
an emitter layer being on the base layer and comprising an N-type III-V semiconductor material;
wherein the collector layer comprises an InGaP layer that is directly or indirectly adjacent to the sub-collector layer, and wherein a bandgap of the InGaP layer is greater than 1.86 eV or a photoluminescence peak wavelength of the InGaP layer is less than 667 nm such that the InGaP layer has a lower ordering effect.