Patent ID: 8431977
Filing Date: 2013-04-30
Classification: H01L

Abstract:
1. A semiconductor chip comprising: a silicon substrate comprising a top side surface and a bottom side surface, wherein said silicon substrate has a thickness smaller than 10 micrometers; a transistor in or on said bottom side surface; a metallization structure under said bottom side surface, wherein said metallization structure comprises a first metal layer and a second metal layer over said first metal layer; a dielectric layer under said silicon substrate and between said first and second metal layers; a passivation layer under said metallization structure and under said dielectric layer, wherein said passivation layer comprises a nitride layer, wherein an opening in said passivation layer is vertically under a contact point of said metallization structure; a polymer layer under said passivation layer, wherein said polymer layer has a thickness between 20 and 200 micrometers; a metal post under said passivation layer and in said polymer layer, wherein said polymer layer does not cover a bottom surface of said metal post, wherein a portion of a top surface of said metal post is in said opening and vertically under said contact point; a metal bump directly vertically under said bottom surface of said metal post and physically connected with said bottom surface of said metal post; a micro-lense over said top side surface; and a glass substrate over said micro-lense and over said top side surface.