Crystal Boule Grinder
Precision grinder for shaping semiconductor crystal boules to exact wafer diameters and grinding flats to indicate conductivity type. Part of wafer preparation equipment under heading 8428 machinery. Covered by 8431.39.00 for other parts of such semiconductor processing machines.
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More Specific Codes
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If suitable for general metalworking
Grinding machines for metal fall under 8460 if not principally for semiconductor boules.
If complete grinding machine, not just parts
Assembled wafer prep machines are in 8428.90, with parts shifting to 8431.
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Import Tips & Compliance
• Document precision tolerances to prove semiconductor-specific use; obtain supplier affidavits
• Avoid pitfall: classifying as general metal grinders
Related Products under HTS 8431.39.00
Seed Crystal Rotation Mechanism
Motorized mechanism that rotates the seed crystal at precise speeds during Czochralski pulling to ensure uniform boule diameter. Critical part for heading 8428 crystal growers. 8431.39.00 classification.
Wafer Bow Measurement Fixture
Fixture that holds wafers during bow/warp measurement in grinding process control stations. Designed for wafer grinder/polisher equipment of heading 8428. Parts in 8431.39.00.
Czochralski Crystal Puller Furnace
A high-temperature furnace used in the Czochralski method to grow monocrystalline silicon boules for semiconductor wafers. It is a part of crystal grower equipment classified under heading 8428 for other machinery of mineral substances. Falls under 8431.39.00 as a part solely for such semiconductor processing machinery.
Float Zone Crystal Grower
Apparatus employing the float zone method to produce ultra-pure monocrystalline semiconductor boules by melting and recrystallizing silicon rods. Classified as machinery of heading 8428 for semiconductor material processing. Its parts are under 8431.39.00 as other parts for such equipment.
Semiconductor Wafer Slicing Diamond Saw
Diamond wire or blade saw designed to slice ultra-thin wafers from monocrystalline semiconductor boules without damage. Essential wafer preparation machinery of heading 8428. Parts thereof are 'other' under 8431.39.00.
Wafer Lapping Machine Platen
Cast iron or composite platen for lapping semiconductor wafers to precise flatness before polishing. Part of wafer grinder/lapper/polisher under 8428 for semiconductor processing. Classified in 8431.39.00 as other parts.