Float Zone Crystal Grower Vacuum Pump Rotor from Japan
The rotor assembly for hermetic vacuum pumps in float zone crystal growers, enabling ultra-high vacuum (UHV) conditions for producing pure monocrystalline semiconductor rods from polycrystalline silicon. This part handles the compression of process gases during zone melting. Falls under 8414.90.41.55 as a component of 8414.40 compressors in semiconductor wafer manufacturing apparatus.
Duty Rate — Japan → United States
10%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Import Tips
• Provide process flow diagrams demonstrating UHV compressor role in float zone method to confirm semiconductor classification
• Label with material certifications (e.g
• non-contaminating alloys) required for cleanroom compatibility
• Avoid misclassification as general pump parts (8413.91); specify hermetic compressor integration for 8414.40 subheading