Float Zone Furnace Quartz Crucible Holder
Although float zone is crucible-less, this precision quartz holder supports seed/feed rods in RF furnaces (8426.11) for stable zone melting. Part for semiconductor crystal growth equipment under 8431.49.1010.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If laboratory quartzware configuration
Quartz lab apparatus not integrated machinery parts go to Chapter 70.
If other ceramic holders
Ceramic wares for technical uses outside machinery classify separately.
Not sure which classification is right?
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Import Tips & Compliance
• Provide thermal expansion coefficient matching quartz tube specs
• Classify as machinery part, not lab ware (7017)
• Certify high-purity quartz for silicon processing
Related Products under HTS 8431.49.10.10
Crystal Puller Seed Holder Chuck
Rotating graphite or molybdenum chuck that precisely grips silicon seed crystal during Czochralski pulling in 8426.11 pullers. Critical growth interface part for 8431.49.1010.
Float Zone Crystal Grower RF Coil
Radio frequency induction coil for float zone crystal growers (8426.11) that melts silicon rods without crucibles to produce high-purity monocrystalline ingots for wafers. Classified in 8431.49.1010 as a principal part dedicated to semiconductor processing equipment.
Wafer Lapping Machine Conditioning Ring
Cast iron or composite conditioning ring for wafer lappers (8426.30) that dresses the lapping plate surface for flatness control in semiconductor wafer preparation. Specific to machinery in 8426.11/19/30 subheadings, hence 8431.49.1010.
Crystal Grinder Flattening Fixture
Custom precision fixture that holds crystal boules for grinding orientation flats indicating conductivity type in 8426.30 equipment. Semiconductor-specific part for 8431.49.1010 classification.
Wafer Polishing Pad Conditioner Disk
Diamond-embedded conditioner disk for dressing chemical mechanical polishing pads on wafer polishers (8426.30). Essential maintenance part solely for semiconductor wafer finishing machinery under 8431.49.1010.
Diamond Wire Saw Tensioner Roller
Ceramic-coated tensioning roller maintaining diamond wire tension and alignment in wafer slicing saws (8426.19). Dedicated semiconductor equipment part under 8431.49.1010.