Semiconductor Crystal Boule Grinder
A precision grinder used to shape semiconductor crystal boules to exact wafer diameters and flats that indicate conductivity type. It is a key part of wafer preparation equipment classified under heading 84.25, and as a part suitable solely or principally for such machinery, it falls under tariff item 8431.10.00. This grinder is used post-growth to prepare boules for subsequent slicing and processing.
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 the grinder is imported as a complete machine rather than a part
Complete machines performing a specific function not described elsewhere in Chapter 84 are classified in heading 84.79.
If the grinder is a machine-tool for working stone, ceramics or similar materials
Machine-tools for working materials other than metal are classified in heading 84.60.
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 grinder is declared as a part of machinery of heading 84.25, with supporting documentation showing its sole or principal use
• Verify whether the item qualifies for preferential tariff treatment under a free trade agreement by providing a valid certificate of origin
• Be prepared to demonstrate that the grinder is not a complete machine, which would be classified elsewhere
Related Products under Tariff item 8431.10.00
Boule Flattener Drive Capstan
A drive capstan for grinding flats on crystal boules to indicate conductivity type. This product is a part suitable for use solely or principally with machinery of heading 84.25, specifically capstans used in semiconductor boule grinding equipment.
Boule Wafer Edge Profiling Tool
A diamond wheel assembly for profiling wafer edges post-slicing to prevent chipping in semiconductor handling. This assembly is a part of the machinery of heading 84.25, as it is used in wafer preparation equipment that performs lifting or hoisting functions. It ensures chip-free rounded edges for fab processing.
CMP Polisher Carrier Capstan
A capstan for chemical mechanical polishing carriers in wafer planarization. This product is a part suitable for use solely or principally with machinery of heading 84.25, specifically capstans used in CMP polishing equipment.
CMP Polisher Platen Assembly
A rotating platen that holds the polishing pad in chemical mechanical planarization (CMP) tools for wafers. This platen is a part of the machinery of heading 84.25, as it is an integral component of wafer polishers that use hoisting or lifting mechanisms. It ensures uniform pressure distribution for consistent polishing.
Crystal Boule Grinder Capstan Drum
A rotary capstan drum for crystal grinders that shape semiconductor boules to precise wafer diameters and flats indicating conductivity. This product is a part suitable for use solely or principally with machinery of heading 84.25, specifically capstan drums used in semiconductor boule grinding.
Crystal Boule Grinder Hoist Assembly
A hoist assembly integrated with crystal boule grinders to precisely shape semiconductor crystal boules to wafer diameters and add conductivity flats. This product is a part suitable for use solely or principally with machinery of heading 84.25, specifically hoists used in semiconductor manufacturing.