Lead 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.

Lead Delaminations

PDIP Lead Delaminations on Bottom - Application Note 1054

Lead Delaminations
Acoustic image of a PDIP showing delaminations (red and yellow) center

Sample & Method

This PDIP (Plastic Dual In-line Package) was imaged at 15 MHz from the top side of the package. Gating was on the interface between the molding compound and the lead frame and paddle.

Result

Red and yellow areas are delaminations of the top side molding compound from the top side both the paddle and lead fingers. Application Note #1053 below shows other aspects of the same PDIP.