Lead and Paddle Delaminations
SOJ Lead and Paddle Delaminations - Application Note 2250
Sample & Method
An SOJ imaged on C-SAM, with gating at the die, lead frame and paddle depths.
Both the die paddle around the die and the inner lead fingers are delaminated (red areas). The pattern of lead finger delamination suggests two possibilities for this condition: 1) there is some type of contamination on the inner lead fingers; or 2) a type of finish that is not compatible with the molding compound was used on the inner lead fingers.