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