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:
Aug. 05, 2014
Filed:
Apr. 24, 2013
Applicant:
International Business Machines Corporation, Armonk, NY (US);
Inventors:
Gerald K. Bartley, Rochester, MN (US);
Darryl J. Becker, Rochester, MN (US);
Philip R. Germann, Oronoco, MN (US);
Andrew B. Maki, Issaquah, WA (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23K 1/018 (2006.01); B23K 3/047 (2006.01);
U.S. Cl.
CPC ...
B23K 1/018 (2013.01); B23K 3/0478 (2013.01);
Abstract
A method, apparatus, and structure are provided for implementing selective rework for chip stacks. A backside metal layer to create resistive heating is added to a chip backside in a chip stack. A rework tool applies a predefined current to the backside metal layer to reflow solder connections and enables separating selected chips in the chip stack.