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. 21, 2006
Filed:
Nov. 22, 2001
Yoshifumi Saitoh, Otsu, JP;
Hiromichi Kawakami, Moriyama, JP;
Yoshifumi Saitoh, Otsu, JP;
Hiromichi Kawakami, Moriyama, JP;
Abstract
A method of producing a ceramic multilayer substrate involves: producing a green composite laminatecontaining first and second shrink-suppressing layers formed on the main surfaces of a green multilayer mother substratecontaining ceramic powder, the first and second shrink-suppressing layers containing a sintering-difficult powder substantially incapable of being sintered under the sintering conditions for the ceramic powder; forming first groovesextending from the first shrink-suppressing layerside into a part of the multilayer mother substrate; firing the composite laminate; removing the first and second shrink-suppressing layersand; dividing the multilayer mother substratealong the groovesand obtaining a plurality of the ceramic multilayer substrates. Thereby, shrinkage in the plan direction at firing can be suppressed. Thus, a ceramic multilayer substrate having a high dimensional accuracy and a high reliability can be produced with a high production efficiency.