|
|
       CODE: 673.382-026 Buy the DOT:Download/CD-ROM
TITLE(s): CRYSTAL GRINDER (electron. comp.)
Operates grinding machine to abrade semiconductor crystal ingot to improve cylindrical shape of
ingot and attain specified diameter: Reads work order to determine target diameter of ingot.
Measures ingot diameter, using calipers or micrometer, and calculates thickness of material to be
removed from ingot and length of grinding time. Positions and secures ingot in trunnions or brackets
on grinding machine. Adjusts machine controls for position of grinding tool and speed of grinding.
Pushes buttons to activate coolant flow, rotation of ingot, grinding tool, and timer. Measures ingot
diameter after grinding and continues grinding to attain specifications for diameter. May change
worn grinding tools and other parts and adjust machine, using handtools. May attach graphite pieces
to ends of ingot before grinding, using epoxy, and remove graphite and epoxy from ingot after
grinding, using radiant oven and solvent. May operate saw to cut sample wafer from ingot for
inspection. May perform routine maintenance on grinding machine, such as adding oil and cleaning
machine. May operate flat grinding machine to grind flat along length of ingot and be
designated Crystal Flat Grinder (electron. comp.).
GOE: 06.02.02 STRENGTH: H GED: R3 M2 L2 SVP: 5 DLU: 86
ONET CROSSWALK: 92965 Crushing, Grinding, Mixing, and Blending Machine Operators and Tenders
|
