System for identification of defects on circuits or other arrayed products
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Abstract
A system and method is disclosed for assessing a probability of failure of operation of a semiconductor wafer. The method includes inputting risk factor data into a memory and inputting a plurality of wafers into a semiconductor fabrication manufacturing process. A subset of wafers is selected to obtain a sample population and at least one region of each wafer of the sample population is inspected. Circuit design data associated with each wafer of the sample population is obtained and one or more defects that present an increased risk to the operation of a particular wafer are identified. The identification is a function of the risk factor data, the inspecting step and the circuit design data. A probability of semiconductor wafer failure is calculated.
50 Citations
63 Claims
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1-34. -34. (canceled)
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35. A method for generating a probability model for assessing the probability of failure of a semiconductor chip due to at least one defect, the method comprising:
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obtaining defect characteristic data;
obtaining chip characteristic data;
specifying a probability relationship between the defect characteristic data and the chip characteristic data, wherein said probability relationship includes at least one first parameter value;
estimating at least one second parameter value for said probability relationship based on defect characteristic data and chip characteristic data; and
generating a probability model comprising said probability relationship and said at least one second parameter value. - View Dependent Claims (36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49)
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50. A computer program, tangibly embodied on a medium readable by a computer, to perform actions directed toward assessing the probability of failure of a semiconductor chip due to at least one defect, the actions comprising:
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from inputs of defect characteristic data and chip characteristic data, specifying a probability relationship between the defect characteristic data and the chip characteristic data, wherein said probability relationship includes at least one first parameter value;
estimating at least one second parameter value for said probability relationship based on defect characteristic data and chip characteristic data; and
generating a probability model comprising said probability relationship and said at least one second parameter value. - View Dependent Claims (51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63)
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Specification