Semiconductor Crystal Boule Grinder Chuck
Precision vacuum chuck for holding crystal boules during diameter grinding in semiconductor wafer preparation equipment. Falls under HTS 8431.49.10.80 as a part of heading 8426 crystal grinders used to prepare boules for wafer slicing.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If for general precision grinding machines
Chucks for non-semiconductor specific grinders fall under heading 8466 for tool parts.
If vacuum-holding function predominates
If primarily a vacuum pump part rather than grinder component, classification shifts to chapter 84 vacuum apparatus.
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Import Tips & Compliance
• Provide boule diameter specifications matching standard semiconductor sizes (150-450mm); ensure flatness tolerance documentation; avoid classification as general grinding machine parts
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