Combining multiple independent sources of information for classification of devices under test
First Claim
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1. A method for determining that a device under test is defective, said method comprising:
- weighting the results of a plurality of defect detecting techniques, wherein said weighting is related to an accuracy of said technique; and
determining a probability that said unit has a defect, wherein said determination is made by combining said results from said plurality of techniques.
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Abstract
Embodiments of the present invention use the results of a plurality of defect detecting tests and adjust the result of each test in a manner that reflects the accuracy of the test that produced it. A manufactured unit can then be evaluated using a mathematical combination of the adjusted results.
45 Citations
20 Claims
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1. A method for determining that a device under test is defective, said method comprising:
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weighting the results of a plurality of defect detecting techniques, wherein said weighting is related to an accuracy of said technique; and
determining a probability that said unit has a defect, wherein said determination is made by combining said results from said plurality of techniques. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A system for evaluating a unit, said system comprising:
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a plurality of testing techniques, wherein each said technique detects the presence of at least one characteristic, and wherein an accuracy of each said technique is capable of being determined; and
means for analyzing results of said techniques that determines a probability that said at least one characteristic is detected by using a combination of each technique'"'"'s results and each said technique'"'"'s accuracy, wherein said probability is used to evaluate said unit. - View Dependent Claims (8, 9, 10)
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11. A computer readable storage medium storing computer executable code, said code comprising:
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code to calculate a confidence factor for each of a plurality of tests;
code that combines results from each of said test with said confidence factor for that test to produce a likelihood for each said test; and
code that combines said likelihoods to arrive at a determination regarding a unit tested by each said test. - View Dependent Claims (12, 13, 14, 15)
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16. A method of evaluating a unit, said method comprising:
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providing a plurality of testing techniques for detecting defects in said unit;
testing at least one standard using each said technique, wherein said standard has a known defect profile;
calculating a weighting factor for each said technique from results of said standard testing; and
testing said unit using each said technique, wherein an acceptability of said unit is determined from a combination of said unit testing results, and said weighting factors. - View Dependent Claims (17, 18, 19, 20)
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Specification