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:
Oct. 15, 1996
Filed:
Dec. 07, 1994
Bernard M Kulwicki, North Attleboro, MA (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
An improved dielectric material and microcircuit having capacitive elements which employ such a dielectric material are disclosed. The dielectric material comprises polycrystalline barium strontium titanate doped with at least one donor element and having a grain size of less than 1 micron. In the preferred embodiments, the donor element may be Nb, Ta, Bi, Sb, Y, La, Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er or a combination thereof. The material may be further doped with an acceptor dopant to control resistivity. The microcircuit comprises capacitors having such a dielectric material and connected to a semiconductor substrate which contains embedded circuitry for reading the voltage across a capacitor.