Float Zone Crystal Cooling Trough

Liquid-cooled trough system for float zone silicon crystal growth, rapidly quenching the molten zone to form defect-free monocrystalline ingots for wafer slicing. HTS 8419.89.9540 for specialized cooling in semiconductor boule manufacturing. Matches statistical note (a)(i).

Import Duty Rates by Country of Origin

Origin CountryMFN RateCh.99 SurchargesTotal Effective Rate
🇨🇳China4.2%+35.0%39.2%
🇲🇽Mexico4.2%+10.0%14.2%
🇨🇦Canada4.2%+10.0%14.2%
🇩🇪Germany4.2%+10.0%14.2%
🇯🇵Japan4.2%+10.0%14.2%

Alternative Classifications

This product could be classified differently depending on its characteristics or intended use.

8419.20.00Lower: 10% vs 39.2%

If uses medical-grade or bulk medical cooling functions

Medical cooling apparatus has separate unit but same cooling function

8479.10.00Lower: 35% vs 39.2%

If complete float zone crystal growing machinery

Entire crystal puller/grower systems classify under semiconductor machinery

Not sure which classification is right?

Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.

Import Tips & Compliance

Provide float zone furnace integration drawings and cooling gradient specifications

Distinguish from general industrial cooling towers via semiconductor boule dimensions

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