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. 11, 1984
Filed:
Jan. 10, 1983
Phillips C Baird, Lakeville, MA (US);
Jay S Greenspan, South Dartmouth, MA (US);
Isotronics, Inc., New Bedford, MA (US);
Abstract
An all-metal microwave chip carrier is provided with subminiature ceramic feedthroughs, each configured to function as a coaxial cable having a predetermined impedance. In one embodiment, the feedthroughs are formed by providing ceramic tubing metallized inside and out in which the ends are cut away to provide half-cylindrical bonding pads. In order to permit bonding directly to the feedthrough, a flat wire lead is soldered to the channel in the ceramic tube, with the ends of the flat wire extending onto the flat portions of the half-cylindrical portions of the feedthrough. In one embodiment, the chip carrier includes a base, ring, and stepped lid, all of Kovar or other suitable material, with the lid being weldable to the ring rather than being brazed or soldered.