Czochralski Crystal Puller
A specialized mixing and stirring machine used in semiconductor manufacturing to grow monocrystalline silicon boules via the Czochralski method, where a seed crystal is dipped into molten silicon and slowly pulled while rotating to form pure crystals. It falls under HTS 8479.82.0040 as a stirring machine for high-precision material processing in wafer production. The continuous stirring of the melt ensures uniform crystal growth essential for semiconductor wafers.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If imported as complete semiconductor manufacturing cell
Machines designed for specific semiconductor processes may classify as complete production units rather than individual function machines.
If primarily for industrial chemical mixing without semiconductor spec
Lack of crystal growth precision features shifts to general industrial machinery heating/cooling provisions.
If equipped with integrated testing sensors for boule quality
Testing apparatus components dominate classification over stirring function per Chapter 90 rules.
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Import Tips & Compliance
• Verify equipment qualifies under semiconductor statistical notes with detailed process documentation to avoid reclassification
• Include technical specs confirming Czochralski method use and compliance with export controls for high-purity silicon processing
Related Products under HTS 8479.82.00.40
Float Zone Crystal Grower
Machine employing float zone method with mixing and stirring mechanisms to purify and grow semiconductor boules by melting a narrow zone of polycrystalline rod via RF heating while translating. Classified under HTS 8479.82.0040 for its kneading/stirring role in zone refinement for ultra-pure silicon wafers. Essential for producing defect-free crystals used in high-performance chips.
Semiconductor Wafer Slurry Mixer
High-precision mixing machine for preparing diamond or silica slurry used in wafer slicing saws, ensuring uniform abrasive particle dispersion critical for thin kerf cuts in silicon wafers. Falls under HTS 8479.82.0040 as semiconductor-specific mixing equipment per statistical notes for wafer preparation. Maintains slurry viscosity for defect-free wafer slicing from crystal boules.
Crystal Boule Melt Stirrer
Magnetic or mechanical stirrer for semiconductor melt crucibles ensuring dopant uniformity during crystal growth, preventing striations in finished silicon ingots. HTS 8479.82.0040 classification for stirring machines in wafer manufacturing equipment per statistical note (a)(i). Critical for resistivity control across wafer diameter.
Gallium Arsenide Precursor Homogenizer
Emulsifying and stirring machine for gallium arsenide compound semiconductor precursors, ensuring molecular uniformity before MOCVD reactor introduction for wafer epitaxy. Under HTS 8479.82.0040 as semiconductor processing mixing equipment per statistical notes. Prevents phase separation critical for III-V wafer quality.
Wafer Grinding Coolant Agitator
Continuous stirring machine for coolant reservoirs in wafer grinders/lappers, preventing abrasive settling during backgrinding to achieve <1 micron flatness. HTS 8479.82.0040 for semiconductor wafer preparation equipment mixing per statistical note (a)(ii)(C). Maintains suspension for TTV control.
Epitaxial Gas Premix Kneader
Kneading machine for multi-component precursor gas mixtures used in epitaxial layer growth on semiconductor wafers, ensuring stoichiometric uniformity. Classified HTS 8479.82.0040 for semiconductor processing stirring/kneading per statistical notes. Critical for compound semiconductor heterostructures.