Carbon nanotube coated capacitor electrodes
View Patent ↗Devices and methods for their formation, including electronic devices containing capacitors, are described. In one embodiment, a device includes a substrate and a capacitor is formed on the substrate. The capacitor includes first and second electrodes and a capacitor dielectric between the first and second electrodes. At least one of the first and second electrodes includes a metal layer having carbon nanotubes coupled thereto. In one aspect of certain embodiments, the carbon nanotubes are at least partially coated with an electrically conductive material. In another aspect of certain embodiments, the substrate comprises an organic substrate and the capacitor dielectric comprises a polymer material. Other embodiments are described and claimed.
1. A device comprising:
a substrate;
a capacitor formed on the substrate, the capacitor comprising first and second electrodes and a capacitor dielectric between the first and second electrodes;
wherein at least one of the first and second electrodes comprises a metal layer and carbon nanotubes coupled thereto; and
wherein a plurality of the carbon nanotubes are in contact with the capacitor dielectric.
2. The device of claim 1 , wherein at least a portion of the plurality of carbon nanotubes are at least partially coated with a metal.
3. The device of claim 2 , wherein the first and second electrodes each comprise at least one metal selected from the group consisting of nickel, iron, cobalt, molybdenum, and ruthenium.
4. The device of claim 2 , wherein the carbon nanotubes extend in a direction that is substantially perpendicular to the electrode that the carbon nanotubes are coupled thereto.
5. The device of claim 2 , wherein the first electrode and the second electrode both include a plurality of carbon nanotubes coupled thereto.
6. The device of claim 2 , further comprising a metal layer on the substrate and an interlayer dielectric layer on the metal layer, wherein the first electrode is positioned on the interlayer dielectric layer, and wherein the first electrode is positioned between the interlayer dielectric layer and the capacitor dielectric layer.
7. The device of claim 2 , wherein the substrate comprises an organic material, and the capacitor dielectric comprises a polymer.
8. The device of claim 2 , wherein the device comprises a computer system including:
a central processing unit which includes the capacitor formed on the substrate;
a memory electronically coupled to the central processing unit;
an input device electronically coupled to the central processing unit;
an output device electronically coupled to the central processing unit; and
a video controller electronically coupled to the central processing unit.