Czochralski Crystal Puller Furnace Chamber from China
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 — China → United States
38.9%
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
9903.88.0125%Except as provided in headings 9903.88.05, 9903.88.06, 9903.88.07, 9903.88.08, 9903.88.10, 9903.88.11, 9903.88.14, 9903.88.19, 9903.88.50, 9903.88.52, 9903.88.58, 9903.88.60, 9903.88.62, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(a) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(b) [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