Crystal Puller Seed Holder Chuck from Japan
Graphite or quartz seed holder chuck that precisely positions seed crystal dip into melt during Czochralski growth. Critical for consistent boule diameter control. Semiconductor crystal grower part under 8442.40.00.00.
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
• Certify thermal shock resistance (>1000°C) and seed size range (1-3mm diameter)
• Thermal gradient profiles must match puller specs for classification support
• Single-crystal vs polycrystalline chucks affect pricing; document material purity