System and method for fault isolation by emission spectra analysis
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United States of America Patent
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Aug 7, 2018
Grant Date -
Sep 17, 2015
app pub date -
Mar 13, 2015
filing date -
Mar 13, 2014
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Abstract
An apparatus and method for optical probing of a DUT is disclosed. The system enables identifying, localizing and classifying faulty devices within the DUT. A selected area of the DUT is imaged while the DUT is receiving test signals, which may be static or dynamic, i.e., causing certain of the active devices to modulate. Light from the DUT is collected and is passed through a rotatable diffracting element prior to imaging it by a sensor and converting it into an electrical signal. The resulting image changes depending on the rotational positioning of the grating. The diffracted image is inspected to identify, localize and classify faulty devices within the DUT.
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