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. 26, 1989
Filed:
Jan. 17, 1989
Applicant:
Inventors:
Dudley A Chance, Newtown, CT (US);
Yung-Haw Hu, Hockessin, DE (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
H01G / ; C04B / ; H01B / ; H01B / ;
U.S. Cl.
CPC ...
361321 ; 29 2542 ; 252 / ; 264 61 ; 501136 ;
Abstract
A high dielectric constant glass-ceramic material comprising small conducting grains based on BaTiO.sub.3 and/or SrTiO.sub.3 on the order of about 0.5-10.0 .mu.m surrounded by a thin microcrystalline insulating barrier layer at the grain boundary about 0.01-0.10 .mu.m thick wherein the conductivity of the grains is enhanced by addition of about 0.1-4.0 mol % of a dopant selected from among Group V elements, Ge and Si substantially incorporated in the bulk lattice of the grains upon Ti sites. A novel process for forming the glass-ceramic material is also disclosed.