Patent ID: 11973136
Assignee: UNIVERSITY OF ELECTRONIC SCIENCE AND TECHNOLOGY OF CHINA
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 4:
5. The method for preparing a flexible microwave power transistor according to claim 4, wherein the thinning a lower surface of the rigid SiC substrate so that a thinned rigid SiC substrate has a thickness less than or equal to 5 μm, so as to obtain a thinned rigid microwave power transistor, specifically comprises:
mechanically grinding and thinning a lower surface of the rigid SiC substrate, so that a mechanically ground and thinned rigid SiC substrate has a thickness less than or equal to 100 μm, so as to obtain a mechanically ground rigid microwave power transistor;
turning over the mechanically ground rigid microwave power transistor and fixing on a silicon (Si) wafer;
using a dry etching machine to etch the lower surface of the rigid SiC substrate of the mechanically ground rigid microwave power transistor, so that an etched rigid SiC substrate has a thickness less than or equal to 5 μm, so as to obtain a thinned rigid microwave power transistor.