Copper Cooling Plate for Float Zone Crystal Furnace from Canada
High-purity copper cooling plate for heat dissipation in float zone crystal growers under heading 8430. Used to produce monocrystalline semiconductor boules like gallium arsenide via zone melting. HTS 8431.49.90.92 applies as copper part for 8430 semiconductor processing machinery.
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
Import Tips
• Purity certificates (>99% copper) required to distinguish from alloyed versions
• End-use statement linking to float zone method per statistical notes strengthens classification