The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 05, 2023
Filed:
Jul. 21, 2020
Applicant:
Ngk Insulators, Ltd., Nagoya, JP;
Inventors:
Assignee:
NGK INSULATORS, LTD., Nagoya, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01T 23/00 (2006.01); H01L 21/683 (2006.01); B28B 1/00 (2006.01); C04B 35/117 (2006.01); C04B 35/565 (2006.01);
U.S. Cl.
CPC ...
H01L 21/6833 (2013.01); B28B 1/001 (2013.01); C04B 35/117 (2013.01); C04B 35/565 (2013.01);
Abstract
A method of manufacturing a composite sintered body includes a step (Step S) of molding mixed powder in which AlO, SiC, and MgO are mixed, into a green body having a predetermined shape and a step (Step S) of generating a composite sintered body by sintering the green body. Then, in Step S, the ratio of SiC to the mixed powder is not lower than 4.0 weight percentage and not higher than 13.0 weight percentage. Further, the purity of AlOin Step Sis not lower than 99.9%. It is thereby possible to suppress the abnormal grain growth of AlOand suitably manufacture a composite sintered body having high relative dielectric constant and withstand voltage, and low tan δ.