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:
Nov. 17, 1998
Filed:
Jun. 28, 1996
Gerard Truman Dickinson, Owego, NY (US);
James Lee McGinniss, Jr, Friendsville, PA (US);
Ronald F Tokarz, Endwell, NY (US);
Aleksander Zubelewicz, Binghamton, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
An apparatus and method provides a testing process and a machine for implementing a testing process to produce failures on a heated circuit card. The apparatus and method applies a controlled, repeatable shear stress to the joints between a circuit board and its mounted components. The circuit board is heated, and one end is twisted with respect to a second end to produce stresses within the circuit board simulating those imposed on components due to thermal cycling. The apparatus may be computer controlled, for regulating the twisting of the circuit board to produce a precise twist angle during a cyclic twisting of the heated circuit board. Electrical resistance of critical joints may be monitored during the testing, and a data base compiled identifying the cycle count at which a failure occurs and location of the failure on the circuit board.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile