Fused Quartz Semiconductor Processing Tubes from Japan
Long, unworked tubes of fused quartz used in semiconductor diffusion furnaces and CVD reactors. Their extreme purity prevents contamination during wafer processing at high temperatures. Falls under 7002.31.00.00 for unworked fused silica tubes.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Require ultra-high purity certifications (OH<5ppm) specific to semiconductor grade for duty preference
• Document annealing-only processing per chapter note (a) to maintain unworked status
• Avoid misdeclaration as 'parts of furnaces' (8417.90)—pure tubing remains in 7002