Czochralski Crystal Puller Grinder
A precision grinding machine used to grind semiconductor crystal boules produced by Czochralski method to exact diameters for wafer slicing. It falls under HTS 8474.20.00 as a grinding machine for mineral substances like silicon crystals in solid form. Essential for semiconductor manufacturing to ensure conductivity and resistivity specifications.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If primarily for optical flatness testing/polishing
Equipment focused on final optical polishing and testing of wafers shifts to Chapter 90 drawbench instruments.
If imported as replacement grinding wheel parts
Parts of grinding machines are classified separately under 8486 if not whole machines.
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Import Tips & Compliance
• Verify machine specs confirm grinding of solid mineral substances like silicon boules, not just polishing
• Include technical datasheets proving semiconductor application to avoid reclassification to Chapter 90
• Ensure EPA compliance for dust emission controls in mineral processing equipment
Related Products under HTS 8474.20.00
Float Zone Crystal Boule Grinder
Grinding apparatus for float zone monocrystalline semiconductor boules, creating precise flats indicating resistivity. Classified in HTS 8474.20.00 for grinding solid mineral substances in semiconductor production. Prepares crystals for wafer slicing by achieving dimensional accuracy.
Silicon Wafer Preparation Lapper
Lapping machine that grinds silicon wafers to tight flatness tolerances before fabrication processing. HTS 8474.20.00 covers this as grinding equipment for semiconductor mineral wafers in solid form. Critical for achieving surface planarity in chip manufacturing.
Gallium Arsenide Crystal Grinder
Specialized grinder for GaAs compound semiconductor boules, grinding to precise diameters and flats. Falls under HTS 8474.20.00 as crushing/grinding machinery for mineral substances in solid form. Used in optoelectronics and high-frequency device production.
Diamond Wafer Grinding Machine
High-precision grinder using diamond abrasives for initial silicon wafer backgrinding. HTS 8474.20.00 applies to grinding machines processing semiconductor mineral wafers. Reduces wafer thickness from 700μm to <100μm for advanced packaging.
boule Crystal Diameter Grinder
Automated grinder that shapes semiconductor boules to uniform diameter specifications for consistent wafer yield. Classified HTS 8474.20.00 for grinding solid mineral substances like silicon crystals. Includes flats grinding for doping orientation.
Semiconductor Wafer Edge Grinder
Edge grinding machine that chamfers and shapes wafer peripheries to prevent chipping during handling. HTS 8474.20.00 for grinding semiconductor wafers as solid mineral products. Improves wafer strength and handling in fabs.