Patent ID: 11894272
Assignee: FILNEX INC.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 11:
12. A method for manufacturing a semiconductor device comprising the steps of:
preparing a semiconductor substrate including a base substrate, a first removal layer that is provided on the base substrate and composed of AlxGa1-xAs (0.6<x≤0.8), a second removal layer that is provided above the first removal layer and is composed of AlyGa1-yAs (0.7≤y≤1, y>x), and a semiconductor epitaxial layer that is provided above the second removal layer and composed of AltGa1-tAs (0≤t≤1), and the semiconductor substrate having a larger etching rate of the second removal layer for a predetermined etching material than the etching rate of the first removal layer for the predetermined etching material;
removing the second removal layer by performing etching using the predetermined etching material; and
bonding the semiconductor epitaxial layer to a destination substrate different from the base substrate after removing the second removal layer.