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:
Mar. 02, 1999
Filed:
Jun. 17, 1997
Applicant:
Inventors:
Alex E Bailey, Hampstead, MD (US);
John Chino, Arnold, MD (US);
Dennis Grube, Ellicott City, MD (US);
Andrea Curbean, Baltimore, MD (US);
Tapan Gupta, Ellicott City, MD (US);
Ronnie L Starling, Columbia, MD (US);
Assignee:
Northrop Grumman Corporaiton, Los Angeles, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B / ; H01P / ;
U.S. Cl.
CPC ...
156 8916 ; 156 8928 ; 156256 ; 156267 ; 156268 ; 333-11 ; 333 241 ;
Abstract
A method of fabricating ferrite toroids used in ferrite phase shifters. The method employs fabrication techniques found in low temperature cofired ceramics (LTCC) tape technology and involves fabricating long rectangular through-holes, as is required by the toroid design, in layers of green ceramic tape and maintaining the integrity of the through-holes during a firing process wherein ferromagnetic ceramic oxide in the tape is converted to ferrite.