Imaging Modes - Multi-Scan

Pictured

Time Domain Imaging (TDI)™
Utilizes an echo (amplitude & polarity) arrival ‘time’ as a reference, such as standard A-Scan, B-Scan and C-Mode type images.

Imaging Modes - Multi‑Scan

Multi-Scan of this TQFP provides a C-scan view of this device at three levels simultaneously. The mold compound to die surface, lead frame and paddle around the die are observed in one physical scan of the part. Since the ultrasonic signal is inverted in polarity at the air spaces (delamination, crack or void) in this image the delaminations at the die surface and paddle are color coded in red and yellow.