Semiconductor Wafer Polishing Platen
A rotary platen assembly for wafer polishers that create mirror-finish surfaces on semiconductor wafers prior to device fabrication, maintaining flatness critical for photolithography overlay. It is a part of the wafer polishing machines of tariff item 8479.89.10.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | — | Free |
| 🇲🇽Mexico | Free | — | Free |
| 🇺🇸United States | Free | — | Free |
| 🇩🇪Germany | Free | — | Free |
| 🇯🇵Japan | Free | — | Free |
More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If imported with the polisher as a complete machine
When shipped together with the polisher, the platen may be considered part of the complete machine.
If the platen is a general-purpose gear or gearing
Gears and gearing are classified in heading 84.83 when not parts of a specific machine.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right tariff item — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Declare this as a part of the wafer polisher (8479.89.10) and provide the machine's model number
• If the platen includes a motor, verify whether the motor is separately classified under Chapter 85
• Ensure the platen is not considered a general-purpose rotating table, which would fall under heading 84.79
Related Products under Tariff item 8479.90.90
Boule Grinder Diameter Gauge
An in-process laser diameter measurement gauge used with crystal boule grinders, providing real-time feedback to CNC controls to ensure wafers cut from boules meet SEMI diameter tolerances of ±0.5 mm. It is a part of the crystal grinding machines of tariff item 8479.89.10, as it contributes to the machine's individual function of shaping semiconductor boules.
Crystal 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 a part of the crystal grinding machines of tariff item 8479.89.10, essential for diameter control and flat marking per conductivity specifications.
Crystal 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 a part of the crystal pulling machines of tariff item 8479.89.10, critical for consistent resistivity across the boule diameter.
Crystal Puller Seed Clip Holder
A high-temperature seed crystal holder for Czochralski pullers that dips the seed into silicon melt to initiate controlled boule growth, made from specialized molybdenum alloys. It is a part of the crystal pulling machines of tariff item 8479.89.10.
Czochralski Crystal Puller Heater Assembly
A replacement heater coil assembly for Czochralski crystal pullers used in growing monocrystalline silicon boules for semiconductor wafers, maintaining precise temperatures during the crystal growth process. It is a part of the crystal pulling machines of tariff item 8479.89.10.
Float 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, essential for localized melting in the zone refining process. It is a part of the crystal growing machines of tariff item 8479.89.10.