Crystal Boule Grinding Coolant Purifier from Mexico
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 — Mexico → United States
15%
Rate breakdown
9903.82.1015%Except as provided for in headings 9903.82.12, 9903.82.17 and 9903.85.68, derivative aluminum and steel articles with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 15 percent, as provided for in subdivision (f) of U.S. note 16 to this subchapter
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
• 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