Electrically stimulated fingerprint sensor test method
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United States of America Patent
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Sep 1, 2009
Grant Date -
Aug 28, 2008
app pub date -
Feb 22, 2007
filing date -
Feb 22, 2007
priority date (Note) -
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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.
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