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       CODE: 726.384-022 Buy the DOT:Download/CD-ROM
TITLE(s): PHOTO MASK INSPECTOR (electron. comp.) alternate titles: mask inspector
Inspects master or production photo mask plates used in fabrication of semiconductor devices for
defects and to ensure conformance to specifications: Positions photo mask plate on stage of
microscope or computer-aided inspection equipment. Focuses and aligns lens with predetermined
coordinates on photo mask plate. Inspects photo mask plate for defects, such as misalignment of
design, contamination, cracks, pinholes, and streaking, and compares photo mask pattern to original
design to verify conformance to specifications. Enters commands to activate computer-aided
inspection equipment that automatically scans surface of photo mask plate to locate and record
defects. Records inspection information, and sorts photo mask plates according to inspection
results. May measure critical dimensions of pattern on photo mask plate and compares dimensions to
design requirements, using microscopes with attached calibrated viewing or image shearing apparatus.
May photograph surface of defective photo mask plate, using instant-print camera. May operate
laser-beam equipment to repair circuitry defects on photo mask plate [LASER-BEAM-TRIM OPERATOR
(electron. comp.) 726.682-010]. May tend equipment that removes contaminants and photoresist from
surface of photo mask plate [PHOTO MASK CLEANER (electron. comp.) 590.684-034].
GOE: 06.01.05 STRENGTH: L GED: R4 M3 L4 SVP: 6 DLU: 86
ONET CROSSWALK: 83002D Electrical and Electronic Inspectors and Testers
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