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Fused Quartz Diffusion Tube from Canada

A high-purity fused quartz tube designed for insertion into diffusion furnaces used in semiconductor wafer production. It withstands extreme temperatures and corrosive gases during the doping process. Classified under HTS 7020.00.30.00 as a specialized quartz article for semiconductor manufacturing equipment.

Duty Rate — Canada → United States

10%

Rate breakdown

9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada

Import Tips

Verify purity certification (SiO2 >99.99%) to confirm fused quartz classification per Chapter 70 notes

Include technical specs and end-use statements proving semiconductor furnace application to avoid reclassification

Ensure proper documentation of thermal shock resistance (>1000°C) as common CBP scrutiny point