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. 10, 1991
Filed:
Feb. 16, 1990
Lance R Kaufman, Paradise Valley, AZ (US);
John A Dombeck, Milwaukee, WI (US);
Lance R. Kaufman, Paradise Valley, AZ (US);
Abstract
An electric circuit assembly and method provides direct bonding of a copper lead frame pattern (430) on a ceramic substrate (402), including the provision of numerous isolated lead frame segments of small size, without requiring individual oxidation nor placement of same on the substrate, and eliminating loss of alignment during fusing during direct bonding. The lead frame pattern (430) includes a plurality of lead frames (432) interconnected and held together by support bridges (434) therebetween. The support bridges (434) are designed to vaporize, open, retract and disappear during the direct bonding operation, resulting in direct bonded fusion of the copper lead frames (432) to the ceramic substrate (402), and eliminating any remnant of the support bridges (434).
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile