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. 16, 2010
Filed:
Dec. 10, 2007
Yasuharu Miyauchi, Tokyo, JP;
Toshiyuki Suzuki, Tokyo, JP;
Masaharu Hirakawa, Tokyo, JP;
Tomoko Nakamura, Tokyo, JP;
Toshinobu Miyakoshi, Tokyo, JP;
Kiyoshi Hatanaka, Tokyo, JP;
Yasuharu Miyauchi, Tokyo, JP;
Toshiyuki Suzuki, Tokyo, JP;
Masaharu Hirakawa, Tokyo, JP;
Tomoko Nakamura, Tokyo, JP;
Toshinobu Miyakoshi, Tokyo, JP;
Kiyoshi Hatanaka, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
A highly reliable ceramics substrate which can sufficiently secure a bonding strength of a surface conductor in an initial state and after a lapse of time (e.g., after a PCT) is provided. The multilayer ceramics substrate has a surface conductor on at least one surface of a multilayer body constituted by a plurality of laminated ceramics substrate layers. A reaction phase formed by a reaction between a ceramics component in the ceramics substrate layers and a glass component in the surface conductor is deposited at an interface between the surface conductor and ceramics substrate layers. For example, an alumina filler in the ceramics substrate layers and Zn in the surface conductor react with each other, thereby forming ZnAlOas the reaction phase.