Float Zone Seed Holder Chuck from Japan
Precision chuck holding polycrystalline seed at exact melting interface during float zone silicon purification. Classified under HTS 8479.90.95.65 for parts of zone refining metal treating apparatus.
Duty Rate — Japan → United States
15%
Rate breakdown
9903.82.1015%Except as provided for in headings 9903.82.12, 9903.82.17 and 9903.85.68, derivative aluminum and steel articles with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 15 percent, as provided for in subdivision (f) of U.S. note 16 to this subchapter
9903.05.900%Articles already subject to Section 232 (steel/aluminum/copper + derivatives, autos + parts, wood, medium/heavy vehicles + parts, semiconductors, patented pharma) — U.S. note 52(f)
Import Tips
• Specify thermal expansion matching to silicon coefficients
• Document surface finish requirements for seed attachment
• Include RF shielding specifications if applicable