Plan 1 : No modifiy
The wettability of A-01 to terminal surface was decreasing, but terminal strength is enough than our standard (8N).
Plan 2 : Additional bonding
If the customer is not satisfied, I think additonal bonding at bottom area is effective.
Plan 3 : Sn plating cancelled
I think wettability of A-01 to terminal surface is decreased by Sn plating layer deterioration.
If Sn plating of bonding surface only cancelled, it's very effective and not needed additional bonding.
But, one side Sn plating is pretty difficult and cost-up.