Chain Sprocket for Wafer Polishing Equipment from Japan
Industrial chain sprocket driving the polishing pad carrier in double-side wafer polishers, achieving mirror-finish surfaces for semiconductor device fabrication. Essential transmission element per statistical note (a)(ii)(C).
Duty Rate — Japan → United States
27.8%
Rate breakdown
9903.82.0925%Except as provided for in headings 9903.82.16, 9903.82.20–9903.82.26 and 9903.85.68, articles of copper and derivative aluminum and steel articles, as provided for in subdivisions (c)(vi)–(viii) and (xi) 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
• Document polishing pad rotation speeds and surface roughness targets (Ra < 1Å)
• Include cleanroom certification (ISO 3 or better) for polishing environment
• Distinguish from general conveyor sprockets (8431.39)