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:
May. 14, 2002
Filed:
Jan. 13, 2000
Emil Kamieniecki, Lexington, MA (US);
Krzysztof E. Kamieniecki, Cambridge, MA (US);
Jeffrey L. Sauer, Danvers, MA (US);
Janusz Butkiewicz, Chelmsford, MA (US);
QC Solutions, Inc., North Billerica, MA (US);
Abstract
This invention relates to a method and apparatus for simulating a surface photo-voltage, more particularly with a photodiode on a process sized disk for calibrating surface photo-voltage measurement devices. The device for simulating a surface photo-voltage includes the photodiode, the disk, a resistor, and may further include an operational amplifier. The apparatus for simulating a surface photo-voltage of the current invention facilitates calibration of surface photo-voltage measurement devices by using a process sized disk to fit directly on a surface photo-voltage measurement chuck.