Crystal Boule Grinder from China
Precision grinder that shapes semiconductor crystal boules to exact diameters and grinds flats indicating conductivity type and resistivity. Critical step in wafer preparation after growth. Classified in HTS 8479.79.00.00 for mechanical preparation machines in semiconductor processing.
Duty Rate — China → United States
20%
Rate breakdown
9903.88.157.5%Except as provided in headings 9903.88.39, 9903.88.42, 9903.88.44, 9903.88.47, 9903.88.49, 9903.88.51, 9903.88.53, 9903.88.55, 9903.88.57, 9903.88.65, 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(r) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(s)
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
Import Tips
• Document diameter precision specs to distinguish from general grinders; obtain cleanroom compatibility certifications
• Pitfall: confusing with optical lens grinders