The Relation between Whisker and Stress

Tin Whiskers Examples

Examples of whiskers observed on QFPs after constant temperature aging

Summary of room temperature aging results

Summary of room temperature aging results

Plating	Room temp. age	Not assembled	Assembled with SAC or Sn-Pb
Sn	6 months	>15㎛ whiskers
Sn	8 months		No whiskers(bumps)
Sn - 3% Bi	6 months	0 -15㎛ whiskers
Sn - 3% Bi	8 months		No whiskers
Sn - 10% Pb	8 months		No whiskers