Silicon Wafer Lapping Plate from Mexico
Cast iron or copper lapping plate used in semiconductor wafer grinders to achieve precise thickness uniformity before polishing. Under HTS 8431.49.10.80 as part of heading 8426 wafer preparation machinery for semiconductor fabrication.
Duty Rate — Mexico → United States
25%
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 of aluminum, of steel or of copper or derivative aluminum or steel articles; passenger vehicles (sedans, sport utility vehicles, crossover utility vehicles, minivans and cargo vans) and light trucks; parts of passenger vehicles (sedans, sport utility vehicles, crossover utility vehicles, minivans and cargo vans) and light trucks; medium- and heavy-duty vehicles; parts of medium- and heavy-duty vehicles; wood products; patented pharmaceutical articles; and semiconductor articles, as provided in subdivision (f) of U.S. note 52 to this subchapter
Import Tips
• Specify flatness grade (e.g
• <1μm) and wafer size compatibility; provide groove pattern documentation; condition plates before use to prevent contamination