Patent ID: 7119411

Claim:
An interconnect structure, comprising: a substrate; a plurality of first metal lines disposed on the substrate; a first insulating layer disposed on the substrate, covering the plurality of first metal lines; a plurality of second metal lines disposed on the first insulating layer; a second insulating layer covering the plurality of second metal lines; a plurality of ITO (indium tin oxide) wirings, each ITO wiring electrically connecting one of the plurality of first metal lines and one of the second metal lines respectively; a passivation structure disposed on the second insulating layer, wherein the passivation structure comprises a plurality of openings, wherein each of the opening exposes only one of corresponding ITO wirings, and each of the openings is separated from the adjacent opening by a surrounding wall; and a plurality of residue ITO rings remains along inner foots of the openings, wherein the residue ITO rings do not extend beyond the openings.