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. 03, 2003
Filed:
Apr. 27, 2001
Yoshitake Terashi, Kokubu, JP;
Masahiro Tomisako, Kokubu, JP;
Satoshi Hamano, Kokubu, JP;
Kazuyoshi Kodama, Kokubu, JP;
Katsuhiko Onitsuka, Kokubu, JP;
Kyocera Corporation, Kyoto, JP;
Abstract
High-frequency ceramics containing SiO , Al O , MgO, ZnO and B O as constituent components, said ceramics comprising: 30 to 50% by weight of a crystal phase containing ZnO and Al O ; 5 to 15% by weight of a crystal phase containing SiO and MgO; and 40 to 60% by weight of an amorphous phase comprising substantially SiO or SiO and B O ; wherein the content of the SiO crystal phase is suppressed to be not larger than 6% by weight. The ceramics has a dielectric loss at 60 GHz of not larger than 15×10 , exhibiting excellent high-frequency characteristics, and is very useful as an insulating substrate for the wiring boards that deal with high-frequency signals.