8431.49.90.92/Copper Alloy RF Window for Wafer Polisher Vacuum Chamber/Canada

Copper Alloy RF Window for Wafer Polisher Vacuum Chamber from Canada

Vacuum-tight copper alloy RF window for microwave coupling in wafer polishers and lappers (heading 8426). Enables plasma-assisted polishing for flat semiconductor wafer surfaces. 8431.49.90.92 for copper parts of semiconductor processing equipment.

Duty Rate — Canada → United States

10%

Rate breakdown

9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
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Import Tips

• RF transmission specs and vacuum rating docs confirm semiconductor-specific design

• Label as 'not for general lab use' to prevent 8419 reclassification

Copper Alloy RF Window for Wafer Polisher Vacuum Chamber from Canada — Import Duty Rate | HTS 8431.49.90.92