Crystal Grinder Diameter Control Drive
Precision speed changer for grinding semiconductor crystal boules to exact wafer diameters. Statistical note (a)(ii)(A) coverage under HTS 8486.40.70.00. Controls grind rate for conductivity flat indication.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If complete grinding machines
Entire crystal grinders classify as machine tools.
If interchangeable grinding wheels
Grinding tools classify separately from drives.
If with integrated measuring
Devices combining speed control with measurement classify in Chapter 90.
Not sure which classification is right?
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Import Tips & Compliance
• Reference statistical note for crystal grinders explicitly
• Diameter tolerance and flat grinding specs essential
• Semiconductor application documentation accesses special rates
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