IEST-RP-CC012.2 & BBN VIBRATION CRITERIA STANDARD

Cleanroom Vibration Criterion (VC) Calculator

Calculate transit root-mean-square (RMS) vibration velocity and third-octave band compliance for sensitive fab tools, electron microscopes, and wafer steppers.

01 Vibration Dynamics Inputs

Predicted RMS Vibration Velocity Telemetry

REAL-TIME SIMULATION
RMS Velocity
2.4 µm/s
1 - 100 Hz band
Attained Curve
VC-E
Target matched
Transmissibility
0.08 Q
92% isolation
Velocity Headroom to Threshold: +23.1% Velocity Margin
Cleanroom Fab Transfer Status: APPROVED FOR ZERO-CALIBRATION ENTRY
Telemetry Frequency Sampling: 24-Bit / 2,048 SPS Continuous
Third-octave band RMS velocity calculations comply with Colin Gordon Associates micro-vibration criteria guidelines.

Vibration Criterion (VC) Curve Fundamentals & Transport Isolation Physics

1 - 100 Hz Spectrum

Human perception thresholds sit at 100 µm/s. Fab tools fail at fractions of this limit. VC curves evaluate 1/3-octave band RMS velocity across 1 Hz to 100 Hz to detect structural resonance before micro-optics shift.

Low-Frequency Dominance

Truck suspensions typically resonate between 1.0 and 2.5 Hz (body bounce) and 10 to 15 Hz (axle hop). Active pneumatic damping introduces counter-phase forces to suppress resonance amplification.

Zero-Drift Delivery

By maintaining transit vibration below VC-E (3.12 µm/s), fab tools arrive without requiring multi-week optical recalibration, saving semiconductor manufacturers millions in lost fab uptime.

Criterion Curve Velocity Limit (µm/s) Max Acceleration (µg @ 10Hz) Typical Tool / Application
VC-A 50.0 320 µg Optical microscopes up to 400X magnification
VC-B 25.0 160 µg Micro-balances, 1000X optical inspection tools
VC-C 12.5 80 µg Standard lithography steppers, scanning electron microscopes
VC-D 6.25 40 µg TEMs, focused ion beams (FIB), sub-micron metrology
VC-E 3.12 20 µg Sub-nanometer EUV lithography, atomic-scale research

Request Route VC-Curve Telemetry & Damping Survey

Planning a sensitive fab tool delivery? Receive an engineered route vibration profile with sensor thresholds mapped for your specific tool model.