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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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End Of Job Description for: "INSPECTOR, CRYSTAL"
DOT:   726.684-054

Job Number: 5230