Grown Diamond Substrate from Mexico
CVD-grown single-crystal diamond substrate weighing more than 2.5g, used in electronics heat sinks. Classified in HTS 3824.99.1900 as cultured crystals not elsewhere specified. Synthetic lab-grown for high thermal conductivity applications.
Duty Rate — Mexico → United States
16.5%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Submit CVD growth process documentation and gemological certification proving synthetic origin
• Weigh and declare each substrate individually to meet 2.5g threshold