Semiconductor Wafer Chiller
A precision cooling unit designed for rapid temperature control of silicon wafers during semiconductor processing to prevent thermal damage. It falls under HTS 8419.89.9540 as machinery for cooling semiconductor materials by changing temperature in a controlled industrial process. Excludes domestic use and focuses on high-precision fab applications.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If imported as replacement parts rather than complete machinery
Separate parts of semiconductor machines classify under 8479, not complete cooling units
If for heating equipment used in semiconductor thermal processing
Same subheading but for heating functions rather than cooling applications
If primarily for automatic temperature testing rather than material treatment
Testing apparatus for temperature control falls in Chapter 90 per statistical notes
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Import Tips & Compliance
• Verify equipment is specifically for semiconductor wafer cooling with fab compatibility certifications to avoid reclassification
• Include detailed process descriptions in entry docs proving temperature change function per Chapter 84 notes
Related Products under HTS 8419.89.95.40
Wafer Crystal Grinder Coolant System
Coolant delivery and temperature control system for crystal grinders preparing semiconductor boules to precise diameters per statistical note (a)(ii)(A). Maintains grinding wheel and boule temperatures for accuracy. HTS 8419.89.9540 cooling for wafer preparation.
Laser Anneal Cooling Water System
High-flow deionized water cooling system for millisecond laser annealing equipment, rapidly cooling wafer backside post 1300°C melt for junction engineering. Classifies 8419.89.9540 as semiconductor processing cooling excluding domestic use.
Crystal Boule Cooling Station
Industrial cooling apparatus for controlled annealing of monocrystalline silicon boules after Czochralski crystal growth, preventing defects from thermal stress. Classified in 8419.89.9540 for semiconductor material treatment involving precise temperature reduction. Essential for wafer manufacturing preparation.
Wafer Lapping Coolant Circulator
Temperature-controlled coolant circulation system for wafer grinders and lappers, maintaining optimal slurry temperatures during semiconductor wafer preparation. HTS 8419.89.9540 covers this cooling machinery for material treatment in wafer fab processes. Ensures flatness tolerances per statistical notes.
Epitaxial Reactor Cold Wall System
Cold wall cooling assembly for MOCVD epitaxial reactors, maintaining chamber walls at stable low temperatures during high-heat thin film deposition on wafers. Falls under 8419.89.9540 as cooling equipment for semiconductor processing temperature management. Critical for layer uniformity.
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).