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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.:

US 10457608 B1

PDFFull Text
Date of Patent:
Oct. 29, 2019

Filed:

Nov. 07, 2018

Multilayer ceramic substrate and electronic device

Applicant:

Murata Manufacturing Co., Ltd., Nagaokakyo-shi, Kyoto-fu, JP;

Inventor:

Seiji Fujita, Nagaokakyo, JP;

Assignee:

MURATA MANUFACTURING CO., LTD., Nagaokakyo-Shi, Kyoto-Fu, JP;

Attorney:

Arent Fox LLP

Primary Examiner:

William H Mayo, III

Assistant Examiner:

Rhadames Alonzo Miller

Int. Cl.
CPC ...
C04B 37/04 (2006.01); H05K 3/46 (2006.01); B32B 17/06 (2006.01); C03C 14/00 (2006.01); C04B 37/00 (2006.01); H05K 1/03 (2006.01); H05K 1/11 (2006.01); H01L 23/538 (2006.01); C03C 3/064 (2006.01); C03C 3/091 (2006.01); C03C 12/00 (2006.01); H01L 23/15 (2006.01); C03B 23/203 (2006.01); H05K 1/09 (2006.01); H05K 1/18 (2006.01);
U.S. Cl.
CPC ...
C04B 37/042 (2013.01); B32B 17/06 (2013.01); C03C 14/004 (2013.01); C04B 37/001 (2013.01); H05K 1/0306 (2013.01); H05K 1/112 (2013.01); H05K 3/4655 (2013.01); C03B 23/203 (2013.01); C03C 2214/04 (2013.01); C04B 2237/343 (2013.01); H05K 1/09 (2013.01); H05K 1/181 (2013.01); H05K 2201/0175 (2013.01); H05K 2201/0195 (2013.01); H05K 2201/068 (2013.01); H05K 2201/10015 (2013.01); H05K 2201/10522 (2013.01); H05K 2203/068 (2013.01);
Abstract

A multilayer ceramic substrate that includes a surface layer portion positioned on an internal layer portion, and a surface layer electrode on a surface of the surface layer portion. The surface layer portion includes a first layer next to the internal layer portion, and the internal layer portion includes a second layer next to the first layer. The thermal expansion coefficient of the first layer is lower than the thermal expansion coefficient of the second layer. The first layer and the second layer each contain glass containing 40 weight % to 65 weight % of MO, where MO is at least one selected from CaO, MgO, SrO, and/or BaO); 35 weight % to 60 weight % of alumina, and 1 weight % to 10 weight % of at least one metal oxide selected from CuO and/or AgO.

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