Equipment for and method of detecting faults in semiconductor integrated circuits
First Claim
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1. An equipment for detecting faults in semiconductor integrated circuits comprising:
- a fault input unit to input fault information for a plurality of divisional units on a surface of said semiconductor integrated circuits formed on a semiconductor wafer;
a superimposing unit providing superimposed fault information, including said fault information from said plurality of divisional units;
a first characteristic factor calculation unit to calculate a first characteristic factor showing a degree to which a fault of one of said plurality of divisional units is repeated within another of said plurality of divisional units from said superimposed fault information; and
a clustering factor calculation unit to calculate a second characteristic factor representing a degree of polarization in a fault distribution within said semiconductor surface;
wherein said first characteristic factor calculation unit determines whether said faults are detected with said second characteristic factor but not detected with said first characteristic factor.
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Abstract
An equipment for detecting faults in semiconductor integrated circuits includes a fault input unit to input fault information for the integrated circuits formed on a semiconductor wafer, a superimposing unit to superimpose the fault information with repeating units within the surface of the semiconductor wafer, and a first characteristic factor calculation unit to calculate a first characteristic factor showing a degree to which faults are repeated every repeating unit.
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6 Claims
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1. An equipment for detecting faults in semiconductor integrated circuits comprising:
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a fault input unit to input fault information for a plurality of divisional units on a surface of said semiconductor integrated circuits formed on a semiconductor wafer; a superimposing unit providing superimposed fault information, including said fault information from said plurality of divisional units; a first characteristic factor calculation unit to calculate a first characteristic factor showing a degree to which a fault of one of said plurality of divisional units is repeated within another of said plurality of divisional units from said superimposed fault information; and a clustering factor calculation unit to calculate a second characteristic factor representing a degree of polarization in a fault distribution within said semiconductor surface; wherein said first characteristic factor calculation unit determines whether said faults are detected with said second characteristic factor but not detected with said first characteristic factor. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification