Patent ID: 7833835
Filing Date: 2010-11-16
Classification: H01L

Abstract:
1. A method for making an interposer having a multi-layer wiring structure, the method comprising the following steps of: forming a first resist pattern for forming at least one first extraction electrode on a substrate, depositing a first ground layer thereon, removing a film on the first resist pattern by a lift-off method, forming a first photosensitive organic film thereon by a spin-on coating, using high resolution photosensitive organic material, forming at least one first via hole in the first photosensitive organic film by exposure and development, filling the at least one first via hole with metal by a plating method, forming a second resist pattern in order to form a first wiring, depositing a first wiring layer portion, removing a film on the second resist pattern by a lift-off method, forming a second photosensitive organic film thereon by a spin-on coating, using high resolution photosensitive organic material, forming at least one second via hole in the second photosensitive organic film by exposure and development, filling the at least one second via hole with metal by a plating method, forming a third resist pattern in order to form a second wiring, depositing metal as a second wiring layer portion, removing a film on the third resist pattern by a lift-off method, forming a third photosensitive organic film thereon by a spin-on coating, using high resolution photosensitive organic material, forming at least one third via hole in the third photosensitive organic film by exposure and development, filling the at least one third via hole with metal by a plating method, forming a forth resist pattern in order to form at least one second extraction electrode, depositing metal as a second ground layer, removing a film on the forth resist pattern by a lift-off method, forming a forth photosensitive organic film thereon by a spin-on coating, using high resolution photosensitive organic material, forming at least one first bump hole in the forth photosensitive organic film by exposure and development, filling the at least one first bump hole with metal by a plating method, grinding the substrate so as to be thin, exposing the second ground layer by dry etching, forming a fifth photosensitive organic film thereon by a spin-on coating, using high resolution photosensitive organic material, forming at least one second bump hole in the fifth photosensitive organic film by exposure and development, filling the at least one second bump hole with metal by a plating method.