"INSPECTOR, CRYSTAL"
Job Description and Jobs
Job Description:
- 1) Inspects, measures, and tests semiconductor crystal ingots to determine compliance with specifications, using measuring devices and test equipment: Transports ingot to workbench by cart or by hand.
- 2) Measures ingot flat, diameter, and length, using calipers and ruler.
- 3) Weighs ingots on scales and calculates weight loss due to grinding and sawing.
- 4) Tests ingot resistivity, using electronic probes.
- 5) Records weights, measurements, and other test results in logbook and on labels, and attaches labels to ingots.
- 6) May operate saws to cut off ends of crystal or to cut sample wafers.
- 7) May tend furnace that heat-treats ingots to alter resistivity to meet specifications.
- 8) May determine crystal orientation, using x-ray machine.
- 9) May operate grinding machine to bevel ends of crystals.
- 10) May operate sandblasting machine to remove glaze from ingot surface.
- 11) May tend equipment that etches ingots to remove surface material.
- 12) May calculate proportion of impurities, using resistivity readings and specified formula.
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DOT: 726.684-054
Job Number: 5230