Czochralski Crystal Puller Furnace Chamber
The furnace chamber is a critical replaceable part for Czochralski crystal growers used in semiconductor wafer manufacturing, containing the high-temperature environment for pulling monocrystalline silicon boules. It falls under HTS 8431.49.90.94 as a part solely for machinery of heading 8429 (industrial ovens and furnaces). This statistical note component ensures precise crystal growth per semiconductor processing standards.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If integrated as a complete industrial furnace unit
Complete ovens for semiconductor crystal growth classify under heading 8419 as machinery, not separate parts.
If for semiconductor wafer processing machines in Chapter 84 statistical notes
Parts dedicated to unlisted semiconductor fab machines may shift to 8479 basket for industrial assembly equipment.
If includes measuring or testing sensors for crystal growth
Components with integral metrology for process control classify in Chapter 90 as testing instruments.
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
• Verify part compatibility certification with heading 8429 machinery via supplier docs to avoid misclassification; ensure RoHS compliance for semiconductor parts; watch for anti-dumping duties on high-tech furnace components from Asia
Related Products under HTS 8431.49.90.94
CMP Polisher Retaining Ring
Consumable retaining ring holding wafers in place during chemical-mechanical polishing for semiconductor devices.
Crystal Puller Seed Chuck Holder
Holder for seed crystal in Czochralski pullers initiating boule growth for semiconductor wafers.
Wafer Grinder Air Bearing
Air bearing spindle support for vibration-free grinding of semiconductor wafers.
Float Zone Puller Vacuum Chamber Lid
Sealable lid for vacuum chamber in float zone semiconductor crystal growth furnaces.
Float Zone Crystal Grower RF Heating Coil
RF heating coil used in float zone crystal pullers to melt and zone-refine semiconductor boules like silicon for ultra-pure wafers. Classified under HTS 8431.49.90.94 as a principal part for heading 8429 crystal growth furnaces in semiconductor manufacturing.
Semiconductor Crystal Boule Grinder Chuck
Precision vacuum chuck for holding crystal boules during grinding to exact wafer diameters, as per statistical note (a)(ii)(A) for wafer prep equipment. HTS 8431.49.90.94 covers it as a part for heading 8430 grinding machines dedicated to semiconductor processing.