Patent ID: 11887893
Assignee: GLOBALWAFERS CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method of manufacturing a semiconductor substrate comprising:
epitaxially growing a buffer layer and a silicon carbide layer on a silicon surface of an N-type silicon carbide substrate, wherein the silicon carbide layer is high-resistivity silicon carbide or N-type silicon carbide (N—SiC);
epitaxially growing a gallium nitride epitaxial layer on the silicon carbide layer to obtain a semiconductor structure composed of the buffer layer, the silicon carbide layer, and the gallium nitride epitaxial layer;
using a laser to form a damaged layer in the semiconductor structure after epitaxially growing the gallium nitride epitaxial layer;
bonding a chip carrier on a surface of the gallium nitride epitaxial layer; and
separating the N-type silicon carbide substrate and the semiconductor structure at where the damaged layer is disposed.