Crystal Boule Grinder Spindle Assembly
A crystal boule grinder spindle assembly is a rotating spindle unit used in crystal grinders to shape semiconductor boules to exact wafer diameters and grind orientation flats. It is a critical component of semiconductor processing machines that prepare materials for ADP systems. This assembly is equally suitable for use with machines of headings 84.70 to 84.72, supporting various wafer preparation functions.
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 |
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If the spindle is a part of a machine-tool of heading 84.56 to 84.65
Parts and accessories for machine-tools are classified under heading 84.66 when suitable for use with those machines.
If the spindle is presented as a transmission shaft
Transmission shafts, including cranks and camshafts, are classified under heading 84.83 when not identifiable as machine parts.
If the spindle is part of a machine with a specific function not covered by headings 84.70 to 84.72
Machines having individual functions not specified elsewhere are classified under heading 84.79.
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
• Ensure the spindle assembly is declared as a part of semiconductor processing equipment, not as a general machine tool part
• Provide evidence of its principal use with machines of headings 84.70 to 84.72 to support classification
• Consider the end-use of the equipment to determine if any duty deferral programs apply
Related Products under Tariff item 8473.50.90
Boule Flattening Grinder Wheel
A boule flattening grinder wheel is a diamond-impregnated wheel used to grind flats on semiconductor crystal boules, indicating resistivity and conductivity type. It is designed for use with crystal preparation equipment that processes semiconductor materials for later fabrication. This wheel is equally suitable for use with machines of headings 84.70 to 84.72, as it supports the preparation of components for ADP systems.
Crystal Growth Crucible Holder
A crystal growth crucible holder is a high-temperature-resistant holder designed to secure quartz crucibles in Czochralski silicon crystal pullers. It maintains crucible alignment and temperature stability during the crystal growth process, which is essential for producing semiconductor-grade silicon. This holder is equally suitable for use with machines of headings 84.70 to 84.72, as it supports the preparation of components for ADP systems.
Czochralski Crystal Puller Mechanism
A Czochralski crystal puller mechanism is a precision-engineered pulling mechanism used in crystal growers to produce monocrystalline silicon boules for semiconductor wafers. It is a key part of semiconductor manufacturing equipment that prepares materials for ADP systems. This mechanism is equally suitable for use with machines of headings 84.70 to 84.72, supporting various crystal growth functions.
Float Zone Crystal Furnace RF Coil
A float zone crystal furnace RF coil is a radio frequency induction coil used in float zone crystal growth furnaces to melt and purify semiconductor material without crucibles. It enables precise heating and zone refining, essential for producing high-purity silicon. This coil is equally suitable for use with machines of headings 84.70 to 84.72, as it supports semiconductor material preparation for ADP systems.
PCI Express Backplane Connector
A PCI Express backplane connector is a high-speed interconnect used to link printed circuit assemblies (PCAs) to backplanes in servers and computing systems. It ensures reliable data transmission between PCAs and other system components, making it an essential part for automatic data processing machines of heading 84.71. This connector is equally suitable for use with machines of headings 84.70 to 84.72, hence its classification under tariff item 8473.50.90.
Semiconductor Wafer Chuck
A semiconductor wafer chuck is a vacuum or electrostatic chuck that securely holds silicon wafers during grinding, polishing, and inspection in semiconductor equipment. It provides particle-free and stable wafer positioning, critical for precision processing. This chuck is equally suitable for use with machines of headings 84.70 to 84.72, supporting various wafer preparation functions.