Crystal Puller Seed Holder Chuck from China
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 — China → United States
37.5%
Rate breakdown
9903.88.0125%Except as provided in headings 9903.88.05, 9903.88.06, 9903.88.07, 9903.88.08, 9903.88.10, 9903.88.11, 9903.88.14, 9903.88.19, 9903.88.50, 9903.88.52, 9903.88.58, 9903.88.60, 9903.88.62, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(a) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(b) [to this subchapter]
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
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