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. 19, 2000
Filed:
Jan. 11, 1999
Applicant:
Inventors:
William F Thiessen, Newtown, CT (US);
Arthur Evans, New Milford, CT (US);
Assignee:
Wentworth Laboratories, Inc., Brookfield, CT (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01R / ;
U.S. Cl.
CPC ...
324761 ; 324754 ; 324755 ;
Abstract
An improved vertical pin probing device is constructed with a housing spaced upper and lower dies of Invar.RTM., which substantially matches the coefficient of thermal expansion of the silicon wafer being probed. Spaced slots in the top and bottom dies of the housing contain inserts of Vespel.RTM.. The inserts are provided with matching patterns of holes supporting probe pins and insulating the probe pins from the housing.