Patent ID: 9048298
Filing Date: 2015-06-02
Classification: H01L

Abstract:
1. A structure comprising: a substrate comprising: a through via extending through the substrate between the frontside surface and the backside surface, the through via comprising an active surface end at the frontside surface; a frontside redistribution structure coupled to the active surface end, the frontside redistribution structure exerting force on the frontside surface; a backside passivation layer coupled to the backside surface; a seed layer coupled to the backside passivation layer; a backside terminal layer plated directly on the seed layer; and a backside warpage control structure consisting of an electrically conductive layer plated on the seed layer, the backside warpage control structure exerting an opposing force to counter the force exerted by the frontside redistribution structure where a thickness of the plated backside terminal layer is different from a thickness of the plated electrically conductive layer.