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:
Feb. 28, 2006
Filed:
Jul. 22, 2003
James Wittman Babcock, Escondido, CA (US);
Jerry Ihor Tustaniwskyj, Mission Viejo, CA (US);
Blanquita Ortega Morange, Poway, CA (US);
Lorraine Lo-lan Wing, Escondido, CA (US);
James Wittman Babcock, Escondido, CA (US);
Jerry Ihor Tustaniwskyj, Mission Viejo, CA (US);
Blanquita Ortega Morange, Poway, CA (US);
Lorraine Lo-Lan Wing, Escondido, CA (US);
Unisys Corporation, Blue Bell, PA (US);
Abstract
A heat-exchanger in a chip tester includes an electric heater and a heatsink which are joined together with a layer of an attach material. The operational period of this heat-exchanger is extended by a method which includes the steps of: 1) testing chips in the chip tester in a manner that puts the heat-exchanger through multiple temperature changes which keep the layer in a solid state and which induce stress-cracks in the layer; 2) subjecting the layer to a crack-healing temperature cycle in which the layer is melted at least partially and re-solidified; and thereafter, 3) repeating the testing step.