Laser Doppler Wafer Vibrometer
Non-contact laser Doppler vibrometry system measuring wafer vibration modes and chucking stability during processing. Critical for overlay improvement. Borderline HTS 9031.41.00.40 for wafer optical inspection applications.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If general laser vibrometers
Semiconductor wafer specificity required for 9031.41.
If non-optical vibration measurement
Optical principle essential for heading inclusion.
If automatic process control vibrometers
Regulatory function per Chapter notes shifts classification.
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Import Tips & Compliance
• Frequency response range (DC-20MHz) and velocity sensitivity specs required
• Prove wafer chucking application vs general vibrometry
• Risk reclassification as acoustic measurement under 9031.80
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