Crystal Boule Grinding Coolant Purifier from Canada
Apparatus that filters and purifies coolant liquids used during crystal grinding in semiconductor wafer preparation to maintain surface flatness tolerances. Falls under HTS 8421.29.0065 for other liquid purifying equipment specific to boule processing.
Duty Rate — Canada → United States
10%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Import Tips
• Include grinding process flowcharts showing coolant recirculation and purification cycles
• Specify particle removal size (sub-micron) relevant to semiconductor tolerances
• Avoid general industrial coolant filters by emphasizing boule diameter precision specs