Metal-insulator-metal capacitors with high capacitance density
First Claim
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1. A metal-insulator-metal (MIM) capacitor comprising:
- a first interlayer dielectric (ILD) layer having a top surface, a plurality of apertures, a first surface area with a perimeter surrounding the apertures, and a second surface area surrounding the first surface area, each aperture including a plurality of sidewalls that extend from the top surface of the first ILD layer into the first ILD layer;
a conformal dielectric layer on the top surface of the first ILD layer and the sidewalls of the apertures; and
a layer stack on the conformal dielectric layer, the layer stack including a first electrode and a capacitor dielectric layer, and the first electrode separated from the first ILD layer by the conformal dielectric layer.
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Abstract
Metal-insulator-metal (MIM) capacitors and methods for fabricating MIM capacitors. The MIM capacitor includes an interlayer dielectric (ILD) layer with apertures each bounded by a plurality of sidewalls and each extending from the top surface of the ILD layer into the first interlayer dielectric layer. A layer stack, which is disposed on the sidewalls of the apertures and the top surface of the ILD layer, includes a bottom conductive electrode, a top conductive electrode, and a capacitor dielectric between the bottom and top conductive electrodes.
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Citations
7 Claims
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1. A metal-insulator-metal (MIM) capacitor comprising:
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a first interlayer dielectric (ILD) layer having a top surface, a plurality of apertures, a first surface area with a perimeter surrounding the apertures, and a second surface area surrounding the first surface area, each aperture including a plurality of sidewalls that extend from the top surface of the first ILD layer into the first ILD layer; a conformal dielectric layer on the top surface of the first ILD layer and the sidewalls of the apertures; and a layer stack on the conformal dielectric layer, the layer stack including a first electrode and a capacitor dielectric layer, and the first electrode separated from the first ILD layer by the conformal dielectric layer. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification