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:
Dec. 02, 1997
Filed:
May. 13, 1996
Louise C Sengupta, Woburn, MA (US);
Eric Ngo, Brighton, MA (US);
Michelina E O'Day, Woburn, MA (US);
Steven Stowell, Boston, MA (US);
Robert Lancto, Wakefield, MA (US);
Somnath Sengupta, Woburn, MA (US);
Thomas V Hynes, Nashua, NH (US);
The United States of America as represented by the Secretary of the Army, Washington, DC (US);
Abstract
A laminated ceramic ferroelectric material has adjacent layers of Barium ontium Titanate (BSTO)--oxide composite stacked in order of descending oxide content and sized in thickness to produce a generally equal capacitance across each layer, resulting in a material having a graded dielectric constant for use in phased array antenna, for example. The oxides are from the metallic oxide group consisting of alumina, zirconia and magnesia and the layers are produced by tape casting.