Method for analyzing defect data and inspection apparatus and review system
First Claim
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1. A method of analyzing defect data obtained from inspection of defects of a semiconductor substrate in an apparatus for analyzing defect data, comprising:
- generating a defect distribution map using information of positions of defects of the semiconductor substrate detected by an inspection apparatus; and
classifying said defects that exist on said generated defect distribution map into one of a plurality of defect categories including a congestion defect, a linear distribution defect, a ring/lump distribution defect and a random distribution defect through at least a discriminating step by using distance between adjacent defects and the local density of defects calculated from said defect distribution map.
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Abstract
The distribution states of defects are analyzed on the basis of the coordinates of defects detected by an inspection apparatus to classify them into a distribution feature category, or any one of repetitive defect, congestion defect, linear distribution defect, ring/lump distribution defect and random defect. In the manufacturing process for semiconductor substrates, defect distribution states are analyzed on the basis of defect data detected by an inspection apparatus, thereby specifying the cause of defect in apparatus or process.
12 Citations
22 Claims
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1. A method of analyzing defect data obtained from inspection of defects of a semiconductor substrate in an apparatus for analyzing defect data, comprising:
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generating a defect distribution map using information of positions of defects of the semiconductor substrate detected by an inspection apparatus; and classifying said defects that exist on said generated defect distribution map into one of a plurality of defect categories including a congestion defect, a linear distribution defect, a ring/lump distribution defect and a random distribution defect through at least a discriminating step by using distance between adjacent defects and the local density of defects calculated from said defect distribution map. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An apparatus for analyzing defect data, comprising:
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a first processor configured to generate a defect distribution map using information of positions of defects detected by an inspection apparatus; and a second processor configured to classify said defects that exist on said generated defect distribution map into one of a congestion defect, a linear distribution defect, a ring/lump distribution defect and a random distribution defect through at least a discriminating step by using, distance between adjacent defects and the local density of defects calculated from said defect distribution map generated by the first processor. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A method of analyzing defect data obtained from inspection of defects of a semiconductor substrate in an apparatus for analyzing defect data, comprising:
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generating a defect distribution map with positions of all defects by using position information of defects of the semiconductor substrate detected by an inspection apparatus; calculating distance between adjacent defects and a Voronoi region area by using a closest point Voronoi diagram corresponding to said defect distribution map; and discriminating a congestion defect through at least a discriminating step using said distance between the adjacent defects; discriminating a linear distribution defect through at least a discriminating step using said distance between the adjacent defects and said Voronoi region area; discriminating a ring/lump distribution defect through at least a discriminating step using said distance between the adjacent defects and said Voronoi region area; and extracting another defect other than said congestion defect, said linear distribution defect and said ring/lump distribution defect. - View Dependent Claims (14, 15, 16, 17)
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18. An apparatus for analyzing defect data, comprising:
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a defect distribution map generator configured to generate a defect distribution map with positions of all defects by using position information of defects detected by an inspection apparatus; a calculator configured to calculate distances between adjacent defects and a Voronoi region area by using a closest point Voronoi diagram corresponding to said defect distribution map; and a processor configured to classify said defects by discriminating a congestion defect through at least a discriminating step using said distances between the adjacent defects, by discriminating a linear distribution defect through at least a discriminating step using said distance between the adjacent defects and said Voronoi region area, by discriminating a ring/lump distribution defect through at least a discriminating step using said distance between the adjacent defect and said Voronoi region area and by extracting another defect other than said congestion defect, said linear distribution defect and said ring/lump distribution defect. - View Dependent Claims (19, 20, 21, 22)
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Specification