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:
May. 28, 1991
Filed:
Nov. 14, 1990
Applicant:
Inventors:
Rong-Fong Huang, Albuquerque, NM (US);
Dean Anderson, Albuquerque, NM (US);
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C04B / ;
U.S. Cl.
CPC ...
264 66 ; 501134 ; 501136 ; 264332 ;
Abstract
A high-frequency dielectric ceramic compound having a perovskite-type crystal structure comprising a chemical composition substantially represented by the formula (Sr.sub.x Ca.sub.y Mn.sub.z)TiO.sub.3 in which 0.98<x+y+z<1.02, 0.34<y<0.4, and 0.0075<z<0.0015, and possessing a non-linear temperature coefficient is set forth. A method is presented for utilizing the compound to formulate a high-frequency dielectric material, the formulated material being particularly suitable for providing filters and related applications with a relatively low resonant frequency temperature coefficient.