Patent ID: 8587089

Claim:
A semiconductor device, comprising: a substrate having a seal ring region and a circuit region; a seal ring structure disposed over the seal ring region; a first passivation layer disposed over the seal ring structure, the first passivation layer having a first passivation layer aperture over the seal ring structure; a metal pad disposed over the first passivation layer, the metal pad coupled to the seal ring structure through the first passivation layer aperture and having a metal pad aperture above the first passivation layer aperture; a second passivation layer disposed over the metal pad, the second passivation layer having a second passivation layer aperture above the metal pad aperture; and a polyimide layer disposed over the second passivation layer, the polyimide layer filling the second passivation layer aperture to form a polyimide root at an exterior tapered edge of the polyimide layer, wherein the exterior tapered edge is adjacent the second passivation layer aperture.