Crystal Boule Grinder Vacuum Extraction Pump from China
This pump is a part of crystal grinders that shape semiconductor boules to precise diameters and grind orientation flats, per statistical note (a)(ii)(A). It extracts grinding dust and maintains cleanroom vacuum conditions during boule preparation for wafer slicing. Classified as other vacuum pump parts under HTS 8414.90.91 for semiconductor equipment.
Duty Rate — China → United States
37.5%
Rate breakdown
9903.88.0125%Except as provided in headings 9903.88.05, 9903.88.06, 9903.88.07, 9903.88.08, 9903.88.10, 9903.88.11, 9903.88.14, 9903.88.19, 9903.88.50, 9903.88.52, 9903.88.58, 9903.88.60, 9903.88.62, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(a) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(b) [to this subchapter]
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
Import Tips
• Include grinder blueprint showing pump integration for flat grinding and diameter control functions
• Certify compatibility with silicon/gallium arsenide boules to meet statistical note material specifications