Patent ID: 8493709
Filing Date: 2013-07-23
Classification: H01G,H01L,Y10T

Abstract:
1. A method of forming a capacitor structure, comprising: sequentially stacking a first plate electrode, a first insulation layer, and a second plate electrode along a first direction, the first and the second electrodes being electrically insulated from each other by the first insulation layer; covering the first and the second electrodes and the first insulation layer with a second insulation layer; forming a first plug through the second insulation layer along the first direction, the first plug making electrical contact with the second electrode; forming a second plug through the second and the first insulation layers along the first direction, the second plug making electrical contact with the first electrode; forming a third insulation layer on the second insulation layer having a first trench through which the first plug is exposed and a second trench through which the second plug is exposed; and forming a third comb-shaped electrode in the first trench and a fourth comb-shaped electrode in the second trench, the third electrode having a first common wiring extending in a second direction and a plurality of first branch wirings extending in a third direction, the first, second, and third directions being orthogonal to one another, the plurality of first branch wirings being commonly connected to the third electrode, and the fourth electrode has a second common wiring extending in the second direction and a plurality of second branch wirings extending in the third direction, the plurality of second branch wirings being commonly connected to the second common wiring such that the third and the fourth electrodes face each other, the first and the second branch wirings being alternately arranged and spaced apart.