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. 22, 2004
Filed:
Jul. 11, 2001
Applicant:
Inventors:
Assignee:
Murata Manufacturing Co., Ltd., Kyoto-fu, JP;
Primary Examiner:
Int. Cl.
CPC ...
B32B 1/800 ;
U.S. Cl.
CPC ...
B32B 1/800 ;
Abstract
An insulating ceramic compact is provided which can be obtained by low-temperature firing, has a low relative dielectric constant and superior high frequency characteristics, and can be co-sintered with a material having a high coefficient of thermal expansion. The insulating ceramic compact is a fired mixture of an MgAl O -based ceramic and a borosilicate glass, in which an MgAl O crystal phase and at least one of an Mg B O crystal phase and an Mg B O crystal phase are precipitated as primary crystal phases.