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. 11, 2018
Filed:
Sep. 01, 2016
Ngk Insulators, Ltd., Nagoya, JP;
NGK Insulators, Ltd., Nagoya, JP;
Abstract
In a step (a), a guard ring is disposed on a ceramic substrate (a second member) such that one of openings of a through hole of the guard ring is covered with a joint surface of the ceramic substrate. In a step (b), a brazing material made of a metal, a powder made of a material having a smaller thermal expansion coefficient than the brazing material, and a feeding terminal are inserted into the through hole. In a step (c), the brazing material is fused to impregnate the powder with the brazing material to thereby form a joint layer including the brazing material and the powder. In this manner, the joint surface and the joint surface are joined to each other through the joint layer.