Czochralski Crystal Puller Ingot Mold from Japan
A precision ingot mold designed for Czochralski crystal growers used in semiconductor wafer production from high-purity silicon. It shapes the monocrystalline boule during the pulling process in metallurgical crystal growth. Classified under 8454.90.00 as an ingot mold part for metallurgy.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Verify material compatibility (e.g
• quartz or graphite) with HTS documentation for semiconductor-grade metallurgy
• Include technical specs proving use in monocrystalline ingot casting to avoid reclassification as general machinery parts
• Obtain supplier certifications for purity levels to meet foundry import standards