Crystal Boule Cooling Zone Heat Exchanger from Canada
This heat exchanger controls the cooling gradient in the post-growth zone of semiconductor crystal pullers, preventing thermal stress in silicon boules. Classified in HTS 8402.90.0010 for vapor boiler systems in wafer manufacturing equipment.
Duty Rate — Canada → United States
14.3%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
Import Tips
• Provide thermal modeling data showing critical cooling rate specifications
• Ensure cleanroom compatibility certification for wafer fab imports
• Separate from shipping containers to avoid 'set' classification issues