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:
Jan. 09, 1996
Filed:
Apr. 25, 1994
Suryanarayana Kaja, Hopewell Junction, NY (US);
Eric D Perfecto, Poughkeepsie, NY (US);
William H Price, Cortlandt Manor, NY (US);
Sampath Purushothaman, Yorktown Heights, NY (US);
Srinivasa N Reddy, LaGrangeville, NY (US);
Vivek M Sura, Pune, IN;
George E White, Fishkill, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A ceramic substrate pad used for establishing brazed connection between a pin and the substrate in the packaging of microelectronic semiconductor circuit chip. The pad is characterized by a stepped setback in the upper surface thereof which setback is oxidized to prevent wetting by the brazing alloy which bonds the pin to the pad. Stresses attributable to the brazing are isolated from the setback area and thus have reduced effect in causing cracking at the edges of the pad-substrate interface.