Czochralski Crystal Puller Furnace Chamber from Japan
The furnace chamber is a critical replaceable part in Czochralski crystal pullers used to grow monocrystalline silicon boules for semiconductor wafers. It provides the high-temperature controlled environment necessary for the pulling process without electrical components. Classified under 8487.90.00 as a machinery part not specified elsewhere in Chapter 84.
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
• Verify the part is free of electrical features per Chapter 84 notes; obtain manufacturer specs confirming non-electrical nature
• Ensure documentation proves semiconductor end-use for potential duty benefits
• Watch for misclassification as complete machinery under 8486