Float Zone Crystal Grower Vacuum Pump Rotor from Germany
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 — Germany → United States
25%
Rate breakdown
9903.82.0925%Except as provided for in headings 9903.82.16, 9903.82.20–9903.82.26 and 9903.85.68, articles of copper and derivative aluminum and steel articles, as provided for in subdivisions (c)(vi)–(viii) and (xi) of U.S. note 16 to this subchapter
9903.05.900%Articles already subject to Section 232 (steel/aluminum/copper + derivatives, autos + parts, wood, medium/heavy vehicles + parts, semiconductors, patented pharma) — U.S. note 52(f)
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