It can be seen from the above figure that the abnormal bonding is a bonding crack and damage to the light-emitting area under the epitaxial layer and the pad.
It can be seen from the above figure that the bonding abnormalities are bonding cracks and damage to the epitaxial layer and the light-emitting area under the pad.
As can be seen from the above figure, the bonding abnormalities are bonding cracks and damage of the epitaxial layer and the light emitting area under the pad.