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:
Feb. 08, 2022
Filed:
Feb. 21, 2019
Applicant:
Murata Manufacturing Co., Ltd., Kyoto, JP;
Inventors:
Ryota Asai, Kyoto, JP;
Yosuke Matsushita, Kyoto, JP;
Assignee:
MURATA MANUFACTURING CO., LTD., Kyoto, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05K 1/11 (2006.01); H05K 1/03 (2006.01); H05K 1/18 (2006.01); H01L 25/00 (2006.01); H05K 3/38 (2006.01); H01L 21/56 (2006.01); H05K 3/46 (2006.01); H01L 21/48 (2006.01); H01L 23/31 (2006.01); H01L 23/498 (2006.01); H05K 3/00 (2006.01); H05K 3/40 (2006.01); H05K 5/06 (2006.01); H01L 23/29 (2006.01); H01L 23/15 (2006.01);
U.S. Cl.
CPC ...
H05K 1/111 (2013.01); H01L 21/4853 (2013.01); H01L 21/56 (2013.01); H01L 23/3121 (2013.01); H01L 23/49811 (2013.01); H01L 23/49894 (2013.01); H01L 25/00 (2013.01); H05K 1/03 (2013.01); H05K 1/0306 (2013.01); H05K 1/181 (2013.01); H05K 3/0044 (2013.01); H05K 3/38 (2013.01); H05K 3/381 (2013.01); H05K 3/4007 (2013.01); H05K 3/46 (2013.01); H05K 5/065 (2013.01); H01L 23/15 (2013.01); H01L 23/293 (2013.01);
Abstract
A ceramic substrate of the present disclosure is a ceramic substrate including a ceramic body having a ceramic layer on a surface thereof and a surface electrode placed on a primary face of the ceramic body. Between the surface electrode and the ceramic layer is an oxide layer made of an insulating oxide having a melting point higher than the firing temperature for the ceramic layer. The oxide layer also extends on the ceramic layer not occupied by the surface electrode. The oxide layer on the ceramic layer not occupied by the surface electrode has a rough surface.