Fused Quartz Diffusion Tube from United States
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. The glass has a very low coefficient of thermal expansion, qualifying for this tariff item.
Duty Rate — United States → Canada
0%
Import Tips
• Keep technical datasheets showing the coefficient of thermal expansion below 5x10-6 per Kelvin
• Specify the semiconductor application in the import documentation
• Consider using a customs broker familiar with high-tech glassware classifications