METHOD OF FORMING A RELIABLE ELECTROCHEMICAL CAPACITOR
First Claim
1. A method of forming an electrochemical capacitor, comprising:
- providing a first substrate that has a surface that is adapted to form a portion of an electrode in an electrochemical capacitor; and
depositing a ruthenium dioxide coating on the surface of the first substrate, wherein the ruthenium dioxide coating is deposited using ruthenium tetroxide.
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Abstract
The present invention generally relates to the method of creating a reliable and cost efficient electrochemical capacitor electrode that has an improved lifetime, lower production cost and improved process performance. The invention generally includes treating or conditioning an electrode surface by depositing a ruthenium containing layer, or layers, having good adhesion to the substrate, low electrical resistivity (high conductivity) and has good resistance to chemical attack during the operation of electrochemical capacitor. One aspect of the invention discussed herein is a method of forming an electrode by depositing a ruthenium containing layer at relatively low temperatures, such as <180° C.
70 Citations
20 Claims
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1. A method of forming an electrochemical capacitor, comprising:
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providing a first substrate that has a surface that is adapted to form a portion of an electrode in an electrochemical capacitor; and
depositing a ruthenium dioxide coating on the surface of the first substrate, wherein the ruthenium dioxide coating is deposited using ruthenium tetroxide. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of forming an electrochemical capacitor, comprising:
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positioning a substrate that has a surface that is adapted to form a portion of a porous electrode in an electrochemical capacitor in a processing region of a processing chamber;
forming a gas comprising ruthenium tetroxide in a first vessel;
transferring an amount of the gas to the surface of the substrate to form a ruthenium containing layer thereon. - View Dependent Claims (9, 10, 11)
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12. A method of forming an electrochemical capacitor, comprising:
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positioning a substrate that has a surface that is adapted to form a portion of a porous electrode in an electrochemical capacitor in a processing region of a processing chamber;
forming a process gas comprising ruthenium tetroxide in a first vessel;
transferring at least a portion of the process gas from the first vessel to a second vessel;
removing unwanted contaminants contained in the second vessel; and
delivering an the ruthenium tetroxide from the second vessel to the substrate positioned on a substrate support in the processing region to form a ruthenium containing layer on a surface of the substrate. - View Dependent Claims (13, 14, 15, 16)
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17. A method of forming an electrochemical capacitor, comprising:
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providing a substrate that has a surface that is adapted to form a portion of a porous electrode in an electrochemical capacitor;
providing an aqueous solution that comprises a ruthenium metal, water and a hypochlorite containing material;
adding an amount of an acid to the aqueous solution;
separating the ruthenium tetroxide from the aqueous solution; and
delivering the ruthenium tetroxide to the substrate positioned on a substrate support in a processing chamber. - View Dependent Claims (18, 19, 20)
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Specification