BK7 Glass Prism Blank from Canada
MgF2 optical window for excimer lasers and deep UV lithography at 193nm. HTS 9001.90.90.00 unmounted crystalline optical element with lowest refractive index. Essential for ArF laser systems.
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
• VUV transmission (>80% at 193nm) data essential
• Hygroscopic nature requires sealed packaging documentation
• Semiconductor fab end-use may trigger additional certifications