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:
Jun. 07, 1994
Filed:
Aug. 10, 1992
Asao Morikawa, Aichi, JP;
Kazuo Kondo, Aichi, JP;
NGK Spark Plug Co., Ltd., Aichi, JP;
Abstract
A process for producing a ceramic sintered body having a metallized via hole previously formed after lamination of the ceramics is disclosed and said process comprises immersing in a first liquid a ceramic semi-sintered body formed through heating at 500 to 900.degree. C. and having a large number of pores and a straight via hole, thereby to allow the first liquid to penetrate into the pores of the semi-sintered body, subsequently immersing the resulting semi-sintered body in a suspension of electrically conductive powder particles having an average particle size of 2 to 3 .mu.m in a second liquid incompatible with the first liquid, thereby to fill the via hole with the suspension, and then sintering the resulting semi-sintered body in a non-oxidizing atmosphere.