Silicon Wafer Lapping Plate from Canada
Cast iron or ceramic plate used in lapping machines to achieve flatness tolerances on semiconductor wafers post-slicing. Part for 8425 wafer preparation apparatus, in 8431.10.0090. Critical for bringing wafers within nanometer-level planarity before polishing.
Duty Rate — Canada → United States
25%
Rate breakdown
9903.94.0525%Except for products described in headings 9903.94.06, 9903.94.32, 9903.94.33, 9903.94.42, 9903.94.43, 9903.94.44, 9903.94.45, 9903.94.52, 9903.94.53, 9903.94.54, 9903.94.55, 9903.94.62, 9903.94.63, 9903.94.66 and 9903.94.67, automobile parts, as provided for in subdivision (g) of U.S. note 33 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
9903.74.110%Articles as provided for in subdivision (l) of U.S. note 38 to this subchapter.
Import Tips
• Document lapping slurry compatibility and flatness specs (<1 micron); avoid general abrasive plate classification
• Use CBP ruling requests for custom plates