Abstract:
A method of forming semiconductor device includes forming a landing pad, forming a stopping insulating layer on the landing pad, forming a lower molding layer including a first material on the stopping insulating layer, forming an upper molding layer including a second material different from the first material on the lower molding layer, forming a hole vertically passing through the upper molding layer and the lower molding layer and exposing the landing pad, forming a first electrode in the hole, removing the upper molding layer to expose a part of a surface of the first electrode, removing the lower molding layer to expose another part of the surface of the first electrode, forming a capacitor dielectric layer on the exposed parts of the surface of the first electrode, and forming a second electrode on the dielectric layer.
Abstract:
Methods of forming a hard mask capable of implementing an electrode having a high aspect ratio are provided. A molding layer may be formed on a substrate. A sacrificial layer may be formed on the molding layer. First mask patterns may be formed in parallel in the sacrificial layer. After the first mask patterns are formed, second mask patterns, which cross the first mask patterns and are in parallel, may be formed in the sacrificial layer. The first mask patterns and the second mask patterns may have materials more opaque than the sacrificial layer. Upper surfaces of the sacrificial layer, the first mask patterns and the second mask patterns may be exposed at the same horizontal level. The sacrificial layer may be removed. Openings, which pass through the molding layer, may be formed using the first mask patterns and the second mask patterns as etch masks. Electrodes may be formed in the openings.
Abstract:
Methods of forming a hard mask capable of implementing an electrode having a high aspect ratio are provided. A molding layer may be formed on a substrate. A sacrificial layer may be formed on the molding layer. First mask patterns may be formed in parallel in the sacrificial layer. After the first mask patterns are formed, second mask patterns, which cross the first mask patterns and are in parallel, may be formed in the sacrificial layer. The first mask patterns and the second mask patterns may have materials more opaque than the sacrificial layer. Upper surfaces of the sacrificial layer, the first mask patterns and the second mask patterns may be exposed at the same horizontal level. The sacrificial layer may be removed. Openings, which pass through the molding layer, may be formed using the first mask patterns and the second mask patterns as etch masks. Electrodes may be formed in the openings.