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:
Sep. 01, 2009
Filed:
Feb. 22, 2007
Fang Xu, Auburndale, MA (US);
Fang Xu, Auburndale, MA (US);
Teradyne, Inc., North Reading, MA (US);
Abstract
Systems and techniques for testing a fingerprint sensor are described. A conductive material is placed on a surface of the fingerprint sensor, and an electrical signal is applied to the conductive material. The electrical signal affects a first electrical property associated with first and second electrodes of the fingerprint sensor. First and second measurements of a second electrical property associated with the first and second electrodes are acquired, the second electrical property being correlated to the first electrical property. The first and second measurements are analyzed to determine whether the fingerprint sensor has one or more defects.