Wafer Polisher Rotation Controller PCA from Canada
Printed circuit assembly controlling multi-platen rotation speeds in chemical mechanical planarization (CMP) wafer polishers for semiconductor devices. Ensures uniform material removal rates across wafer surfaces. Under HTS 8473.30.11 for heading 8471 wafer processing machines.
Duty Rate — Canada → United States
25%
Rate breakdown
9903.79.0125%Semiconductor articles as provided for in subdivisions (a) and (b) of U.S. note 39 to this subchapter
9903.05.860%Universal product exemption (U.S. note 52(b))
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 RPM precision (0.1%) and synchronization algorithms for multi-head polishers
• Include chemical resistance specifications for CMP slurry environments
• Provide endpoint detection integration proof excluding Chapter 90 classification