Patent ID: 11955518
Assignee: XIAMEN SANAN INTEGRATED CIRCUIT CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 13:
14. The epitaxial structure according to claim 13, wherein:
said first emitter layer includes a first region and a second region that are respectively located proximal to and distal from said composite base unit, and that respectively contain GaγIn(1-γ)P and GaδIn(1-δ)P, where γ ranges from 0.6 to 0.8, and δ ranges from 0.27 to 0.33;
said second emitter layer is made of GaεIn(1-ε)P, where ε ranges from 0.27 to 0.33; and
said third emitter layer includes a first region and a second region that are respectively located proximal to and distal from said second emitter layer, and that respectively contain GaηIn(1-η)P and GaθIn(1-θ)P, where η ranges from 0.27 to 0.33, and γ ranges from 0.46 to 0.56.