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:
Sep. 19, 2000
Filed:
Mar. 27, 1998
Yoshitake Terashi, Kokubu, JP;
Kyocera Corporation, Kyoto, JP;
Abstract
The insulated board of this invention is a sintered body of a complex oxide containing Si, Al, Mg, Zn and B as constituent elements. This sintered body contains a spinel crystal phase containing at least ZnO and Al.sub.2 O.sub.3 and a quartz crystal phase. Since the amorphous phase does not substantially contain ZnO, Al.sub.2 O.sub.3 or MgO, the sintered body has a low dielectric loss of 30.times.10.sup.-4 or below and a dielectric constant of 30 or below at a frequency of 15 to 20 GHz. As a result, by forming a wiring layer on the surface or the inside of the insulated board of this invention, the insulated board can transmit high frequency signals at a low loss as the wiring layer.