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:
Dec. 09, 2003
Filed:
Jan. 30, 2002
Francis T. McQuade, Watertown, CT (US);
Zbigniew Kukielka, Plainville, CT (US);
William F. Thiessen, Newtown, CT (US);
Stephen Evans, Newtown, CT (US);
Wentworth Laboratories, Inc., Brookfield, CT (US);
Abstract
A probe head assembly for use in a vertical pin probing device of the type used to electrically test integrated circuit devices has a metallic spacer portion formed from a plurality of laminated metallic layers. The laminated metallic layers are formed from a low coefficient of thermal expansion metal, such as Invar, a 36% nickel—64% iron alloy. By orienting the metallic grains of the laminated metal layers to be off-set from the orientation of metallic grains of adjacent metallic foil layers, increased strength and flatness is achieved.