Grown Diamond Substrate from Canada
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 — Canada → United States
16.5%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
Import Tips
• Submit CVD growth process documentation and gemological certification proving synthetic origin
• Weigh and declare each substrate individually to meet 2.5g threshold