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:
Jan. 02, 1990
Filed:
Dec. 19, 1986
Applicant:
Inventors:
Yasumasa Wakasugi, Kawasaki, JP;
Masahiro Sugimoto, Yokosuka, JP;
Assignee:
Fujitsu Limited, Kawasaki, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G04B / ;
U.S. Cl.
CPC ...
501128 ;
Abstract
A low dielectric constant ceramic substrate comprised of 90 to 98% of mullite (3Al.sub.2 O.sub.3. 2SiO.sub.2) and 10 to 2% of a sintering promotor comprised of 0.5 to 3% of magnesia (MgO) and 1.5 to 7% of calcium oxide (CaO).