Method for producing smooth coherent metal chalconide films
AssigneeTDC Technology Development Corporation
InventorsWilliam R. Fawcett, Andrzej S. Baranski
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Abstract
Smooth coherent metal chalconide film is electroplated onto a cathode from an electroplating bath comprising a solution in an organic polar solvent metal salt and elemental chalcogen at elevated temperature and low current density.
Claims35
A method for producing a smooth coherent mixed metallic chalconide film of which the metal moiety is a metal selected from the group consisting of Cd, Pb, Hg, Cu, Bi, Co, Ni, Tl, Ag, In, Fe, and mixtures thereof and the chalconide moiety is a chalcogen selected from the group consisting of S, Se, Te and mixtures thereof, at least one of said metal and said chalcogen comprising a mixture, comprising the steps of providing an electrolytic bath comprising an organic polar solvent having dissolved therein (a) said metal in the form of a salt that is ionised and is electrically conductive in solution in said solvent and (b) said chalcogen in elemental form;
- maintaining the bath at elevated temperature above about 80.degree. C.;
- subjecting the bath to electrolysis at a current density that is sufficiently low with respect to the surface area of the cathode that a smooth coherent film of said mixed chalconide is deposited on the cathode;
- and continuing the electrolysis until a desired thickness of film has built up on the cathode.
A method for producing a smooth coherent film of a metal chalconide of which the metal moiety is a metal selected from the group consisting of Ag, In, and Fe, and the chalconide moiety is a chalcogen selected from the group consisting of S, Se, and Te, comprising the steps of providing an electrolytic bath comprising an organic polar solvent having dissolved therein (a) a salt of said metal that is ionised and is electrically conductive in solution in said solvent and (b) said chalcogen in elemental form;
- maintaining the bath at elevated temperature above about 80.degree. C.;
- subjecting the bath to electrolysis at a current density that is sufficiently low with respect to the surface area of the cathode that a smooth coherent film of said chalconide is deposited on the cathode;
- and continuing the electrolysis until a desired thickness of film has built up on the cathode.
A method for producing a smooth coherent film of a metal chalconide of which the metal moiety is a metal selected from the group consisting of Cd, Pb, Hg, Cu, Bi, Co, Ni, Tl, Ag, In, and Fe, and the chalconide moiety is Te comprising the steps of providing an electrolytic bath comprising an organic polar solvent having dissolved therein (a) a salt of said metal that is ionised and is electrically conductive in solution in said solvent and (b) said chalcogen in elemental form;
- maintaining the bath at elevated temperature above about 80.degree. C.;
- subjecting the bath to electrolysis at a current density that is sufficiently low with respect to the surface area of the cathode that a smooth coherent film of said chalconide is deposited on the cathode;
- and continuing the electrolysis until a desired thickness of film has built up on the cathode.
A method for producing a smooth coherent film of a metal chalconide of which the metal moiety is a metal selected from the group consisting of Cd, Pb, Hg, Cu, Bi, Co, Ni, Tl, Ag, In, and Fe, and the chalconide moiety is a chalcogen selected from the group consisting of S, Se, and Te, comprising the steps of providing an electrolytic bath comprising an organic polar solvent having dissolved therein (a) a salt of said metal that is ionised and is electrically conductive in solution in said solvent and (b) said chalcogen in elemental form;
- disposing in the bath an anode and a cathode comprising a metal selected from the group consisting of tin, zinc, and indium;
- maintaining the bath at elevated temperature above about 80.degree. C.;
- subjecting the bath to electrolysis at a current density that is sufficiently low with respect to the surface area of the cathode that a smooth coherent film of said chalconide is deposited on the cathode;
- and continuing the electrolysis until a desired thickness of film has built up on the cathode.
Dependencies are inferred from the claim text.