Calibration Phantoms for Micro-CT Voxel Pitch Verification
Verify micro-CT voxel pitch with certified ball-bar or grid phantoms to prevent thermal drift from turning compliant solder joints into false defect rejects.
Correlating Nondestructive X-Ray Computed Tomography Density Gradients to Destructive Metallographic Cross-Section Barrel Fill Measurements
Correlate CT density gradients to microsections by locking segmentation thresholds to the lowest radial slice fill percentage measured on baseline coupons.
Quantifying Non Destructive Barrel Fill Verification in Blind Thermal via Arrays for Heavy Power Planes
Non-destructive verification of blind thermal via fill requires 3D computed laminography to isolate inner-layer solder volume through heavy copper planes.
Statistical Process Control Boundaries for Re-Qualifying Inline X-Ray Systems
Inline X-ray system re-qualification relies on statistical limits derived from detector drift and grey-scale stability rather than arbitrary time intervals.
Radiometric Gain Correction in Multi Slice Tomosynthesis Board Assembly Scans
Radiometric gain correction standardizes pixel sensitivity to eliminate streak artifacts and secure accurate void and volume sizing in multi-slice board scans.
Quantifying Radiographic Escape Rates for Bottom Terminated Component Solder Joints
Radiographic escape quantification requires correlating grey-scale attenuation thresholds with physical microsections to catch hidden non-wetting defects.
Lead Free Solder Alloy Attenuation Factors during X-Ray Profiling
Lead-free alloy attenuation shifts require recalibrating X-ray tube parameters and grey-scale thresholds to ensure accurate void measurement and line yield.