Used Float Zone Crystal Grower
A used float zone furnace for growing high-purity silicon crystals by melting a polycrystalline rod without a crucible. It aligns with statistical note (a)(i) for crystal growers in semiconductor wafer prep, classified as used machinery under 8439.10.0090 for pulp-making processes involving fibrous cellulosic semiconductor substrates.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If incorporating industrial furnaces as primary function
Float zone systems with heating elements may classify under electric industrial furnaces.
If for thermal processing machines in semiconductor fab
Heading 8486 covers semiconductor-specific thermal equipment, excluding rebuilt pulp machinery.
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Import Tips & Compliance
• Provide evidence of operational hours (>1000) to confirm 'used' status and prevent new import duties
• Label with clear 'Used Industrial Machinery' markings for customs to avoid valuation disputes
• Check for hazardous material certifications from prior silicon doping processes
Related Products under HTS 8439.10.00.90
Rebuilt Czochralski Crystal Puller
A rebuilt machine used to produce monocrystalline silicon boules from molten silicon via the Czochralski method, essential for semiconductor wafer manufacturing. Classified under HTS 8439.10.0090 as rebuilt machinery for processing semiconductor materials into forms suitable for pulp-like fibrous cellulosic handling in paperboard production contexts, per statistical notes on wafer manufacturing equipment. It falls here due to its used/rebuilt status and role in material growth for advanced substrates.
Rebuilt Crystal Boule Grinder
Rebuilt grinder for shaping silicon crystal boules to precise diameters and flats indicating conductivity. Per statistical note (a)(ii)(A), it's wafer prep equipment classified under rebuilt machinery for pulp of fibrous cellulosic materials in semiconductor contexts.
Used Wafer Slicing Diamond Saw
Used diamond wire saw for slicing thin wafers from monocrystalline semiconductor boules, as in statistical note (a)(ii)(B). Falls under 8439.10.0090 for used machinery in pulp-making from fibrous cellulosic semiconductor materials.
Used Semiconductor Wafer Polisher
Used chemical-mechanical polisher (CMP) for surface finishing of silicon wafers to atomic flatness. Matches statistical note (a)(ii)(C) wafer polishers, under used pulp-finishing machinery 8439.10.0090.
Used Paper Stock Washer for Wafer Cellulose
Used washer for removing impurities from pulp stock, suitable for cellulose in semiconductor paperboard substrates. Classified under used pulp machinery 8439.10.0090.
Rebuilt Wafer Lapping Machine
Rebuilt lapping equipment for flatness correction on semiconductor wafers prior to polishing, per statistical note (a)(ii)(C). Classified as rebuilt pulp machinery under 8439.10.0090 for cellulosic material finishing.