Method for detecting defects
First Claim
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1. A method for detecting defects comprising:
- scanning a wafer for obtaining a first information indicating a quantity of a plurality of particles on the wafer and a plurality of locations of the particles on the wafer;
coating a photoresist layer on the wafer;
processing exposure and development on the photoresist layer;
scanning the wafer after the development for obtaining a second information indicating a quantity of a plurality of defects on the wafer and a plurality of locations of the defects on the wafer; and
comparing the first information and second information for calculating the quantity, types and the locations of the defects.
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Abstract
A method for detecting defects comprises scanning a clean blank wafer for figuring out the quantity and locations of particles; then, scanning the wafer again after performing coating, exposure, and development processes on the wafer; comparing the two scanning results for figuring out the locations of the defects and calculating quantities of the defects by checking the patterns and colors, and then to obtain the quantities and types of the defects in mechanisms and photoresist respectively.
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13 Claims
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1. A method for detecting defects comprising:
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scanning a wafer for obtaining a first information indicating a quantity of a plurality of particles on the wafer and a plurality of locations of the particles on the wafer; coating a photoresist layer on the wafer; processing exposure and development on the photoresist layer; scanning the wafer after the development for obtaining a second information indicating a quantity of a plurality of defects on the wafer and a plurality of locations of the defects on the wafer; and comparing the first information and second information for calculating the quantity, types and the locations of the defects. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for detecting defects which detects a quantity of a plurality of particles within coating, exposure, and development mechanisms in a photo module, and a quantity of a plurality of defects after coating, exposure, and development process, comprising:
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scanning a clean wafer for a first information indicating a quantity of a plurality of particles and a plurality of locations of the particles; coating the wafer with a photoresist layer; processing exposure and development on the wafer for forming a desired pattern; scanning the desired pattern for obtaining a second information indicating a quantity of a plurality of defects and a plurality of locations of the defects; and comparing the patterns and the difference between the quantities in the first information and the second information. - View Dependent Claims (9, 10, 11, 12, 13)
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Specification