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:
Apr. 04, 2000
Filed:
Apr. 06, 1999
Applicant:
Inventors:
Yukihisa Takeuchi, Nishikamo-gun, JP;
Tsutomu Nanataki, Toyoake, JP;
Katsuyuki Takeuchi, Nagoya, JP;
Assignee:
NGK Insulators, Ltd., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
156 8911 ; 156 8912 ; 310324 ;
Abstract
A method for producing a ceramic diaphragm structure includes preparing a ceramic green substrate having at least one window and a plurality of layers, and a thin ceramic green sheet. The ceramic green sheet is superposed on the ceramic green substrate to cover the window and thereby provide a unitary laminate. The laminate is then fired so that the ceramic green sheet provides a diaphragm portion which protrudes in a direction away from the window. The average sintering temperature difference or the average shrinkage-rate difference, of the layers of the ceramic green substrate, is larger than zero.