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:
Apr. 24, 2001
Filed:
Sep. 29, 1998
Applicant:
Inventors:
Peter J. Brofman, Hopewell Junction, NY (US);
Shaji Faroog, Hopewell Junction, NY (US);
John U. Knickerbocker, Hopewell Junction, NY (US);
Scott I. Langenthal, Hyde Park, NY (US);
Sudipta K. Ray, Wappingers Falls, NY (US);
Kathleen A. Stalter, Hopewell Junction, NY (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B23K 3/100 ; B23K 3/102 ;
U.S. Cl.
CPC ...
B23K 3/100 ; B23K 3/102 ;
Abstract
A semiconductor device having C-4 solder connections is joined to a chip carrier having pads suitable for receiving the C-4 solder connections. Sacrificial solder is formed on the chip carrier pads and then planarized to result in a good, planar surface profile for joining to the semiconductor device.