Patent ID: 9136317
Filing Date: 2015-09-15
Classification: H01L

Abstract:
1. A fabricating method of a capacitor, comprising steps of: forming a dielectric material layer on a substrate; patterning the dielectric material layer to form a patterned dielectric material layer, wherein the patterned dielectric material comprises a first opening and a second opening therein; forming a first electrode in the first opening, and forming a second electrode in the second opening at the same time; at least removing a portion of the patterned dielectric material layer that is between the first electrode and second electrode to form a third opening therein; forming a middle dielectric material layer in the third opening, wherein the middle dielectric material layer comprises a high dielectric constant material layer, wherein the step of forming the third opening comprises: forming a second capping layer on the patterned dielectric material layer, the first electrode, and the second electrode; forming a middle layer on the second capping layer; forming a patterned mask layer on the middle layer, wherein a width of a third opening of the patterned mask layer is equal to a distance between the first electrode and the second electrode; patterning the middle layer, the second capping layer and the patterned dielectric material layer by using the patterned mask layer as a mask to form the third opening; and removing the patterned mask layer.