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Vacuum cleaners. > With self-contained electric motor: > Parts > Of the goods of tariff item No. 8479.89.41 or 8479.89.49: > Other > Other
Duty Rate (from China)
Products classified under Tariff item 8479.90.19.00
Boule Grinder Diameter Gauge
An in-process laser diameter measurement gauge used with crystal boule grinders. It provides real-time feedback to CNC controls to ensure wafers cut from the boule meet SEMI diameter tolerances. This is a part of the goods of tariff item 8479.89.10, which covers crystal grinders.
8479.90.19Crystal Boule Grinder Spindle
A high-precision spindle assembly for crystal grinders that shape semiconductor boules to exact wafer diameters and grind orientation flats. It is critical for diameter control and flat marking per conductivity specifications. This spindle is a part of the goods of tariff item 8479.89.10.
8479.90.19Crystal Grower Crucible Rotation Mechanism
A motorized rotation drive for quartz crucibles in Czochralski crystal pullers, ensuring uniform dopant distribution during silicon ingot growth. It is critical for consistent resistivity across the boule diameter. This mechanism is a part of the goods of tariff item 8479.89.10.
8479.90.19Crystal Puller Seed Clip Holder
A high-temperature seed crystal holder for Czochralski pullers that dips the seed into the silicon melt to initiate controlled boule growth. It is made from specialized molybdenum alloys. This holder is a part of the goods of tariff item 8479.89.10.
8479.90.19Czochralski Crystal Puller Heater Assembly
A replacement heater coil assembly for Czochralski crystal pullers used in growing monocrystalline silicon boules for semiconductor wafers. It maintains precise temperatures during the crystal growth process. This heater is a part of the goods of tariff item 8479.89.10.
8479.90.19Float Zone Crystal Grower RF Coil
A radio frequency induction coil replacement part for float zone crystal growers that produce high-purity silicon crystals for semiconductor wafers. It is essential for localized melting in the zone refining process. This coil is a part of the goods of tariff item 8479.89.10.
8479.90.19Lapper Slurry Flow Controller
A precision flow control valve assembly for wafer lapping machines that regulates nanoliter/minute slurry delivery for consistent material removal rates. It maintains bow/warp specifications. This valve is a part of the goods of tariff item 8479.89.10.
8479.90.19Polisher Head Pressure Bladder
A replaceable elastomeric bladder for chemical mechanical polishing (CMP) heads that provides uniform pressure distribution across the entire wafer surface. It achieves less than 1% non-uniformity. This bladder is a part of the goods of tariff item 8479.89.10.
8479.90.19Semiconductor Wafer Polishing Platen
A rotary platen assembly for wafer polishers that creates mirror-finish surfaces on semiconductor wafers prior to device fabrication. It maintains flatness critical for photolithography overlay. This platen is a part of the goods of tariff item 8479.89.10.
8479.90.19Wafer Grinder Coolant Distribution Ring
A nozzle ring assembly that evenly distributes coolant during crystal boule and wafer grinding operations, preventing thermal damage to semiconductor material. It is designed for sub-micron precision grinding. This ring is a part of the goods of tariff item 8479.89.10.
8479.90.19Wafer Lapping Machine Workholder
A vacuum workholder plate for wafer lappers that holds silicon wafers during precision lapping to achieve required thickness and flatness tolerances. It is designed for semiconductor wafer preparation before fabrication. This workholder is a part of the goods of tariff item 8479.89.10.
8479.90.19Wafer Polisher Load Cell Assembly
A precision load cell sensor array for wafer polishing machines that monitors and controls downforce to achieve nanometer-level surface flatness. It is essential for CMP process development. This sensor array is a part of the goods of tariff item 8479.89.10.
8479.90.19Wafer Slicing Diamond Wire Guide
A precision guide assembly for diamond wire wafer slicing saws that cut semiconductor boules into thin wafers. It ensures wire alignment and tension during high-precision slicing. This guide is a part of the goods of tariff item 8479.89.10.
8479.90.19Wafer Sorter Cassette Elevator
An automated cassette elevator mechanism for wafer preparation equipment that transfers FOUPs/cassettes between process modules while maintaining contamination control. It is a part of the goods of tariff item 8479.89.10.
8479.90.19Wire Saw Slurry Recirculation Pump
A specialized peristaltic pump for recirculating diamond slurry in wafer slicing wire saws, maintaining consistent abrasive concentration for thin kerf slicing. It is critical for minimizing wafer thickness variation. This pump is a part of the goods of tariff item 8479.89.10.