Substrate Delaminations

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.

Substrate Delaminations

PBGA Substrate Delaminations - Application Note 2535

Substrate Delaminations

Sample & Method

A plastic BGA. Planar C-SAM image gated within the substrate.

Result

The two bright circular regions at left are extensive delaminations, where layers in the substrate have separated. For a 3V view of the same sample, see Application Note #2641.