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. 15, 2000
Filed:
Aug. 05, 1997
Applicant:
Inventor:
Roger L Verkuil, Wappinger Falls, NY (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01R / ; G01R / ;
U.S. Cl.
CPC ...
324765 ; 324766 ; 3241581 ; 324767 ;
Abstract
Corona charge is applied to a semiconductor product wafer to reverse bias PN junctions. Measurements of voltage decay in the dark and in the light are made and combined to determine a PN junction leakage characteristic. A portion of the dark measurement is taken in the light to permit normalizing the light and dark measurements.