Production of thin, stable, solid electrolyte films of high ionic conductivity
First Claim
1. A process for depositing thin films of complex silver iodo solid electrolytes on a substrate, said electrolytes having good ionic conductivity at room temperature, which comprises evaporating an electrolyte material selected from the group consisting of (a) a stoichiometric complex silver iodo solid electrolyte material and (b) a mixture of the components in stoichiometric proportions of said solid electrolyte material, by flash evaporation, and wherein the vaporized products include silver-containing and iodine-containing constituents, and depositing said constituents on a heated substrate while maintaining the temperature of said heated substrate at a sufficiently elevated temperature to maintain the original stoichiometric ratio of said constituents as they recombine and deposit on said substrate to form the original solid electrolyte material.
0 Assignments
0 Petitions
Accused Products
Abstract
Production of thin stable films of oxy-anion-substituted silver iodide solid electrolytes, such as Ag19 I15 P2 O7, on a substrate, such films having good ionic conductivity at room temperature, by vaporizing such oxy-anion-substituted silver iodide elecytrolyte material, or a mixture of the components thereof in stoichiometric proportions, by flash evaporation of such electrolyte material at high temperature, preferably ranging from about 1,400° to about 1,600° C., or by RF sputtering, preferably at electrode potentials ranging from about 700 to about 900 volts, and maintaining the substrate on which the solid electrolyte film is deposited, at certain elevated temperatures, preferably ranging from about 140° to about 150° C., to permit recombination and deposition of the vaporized constituents of the electrolyte material on the substrate, to form a thin film of the solid electrolyte such that the solid electrolyte film thus formed is neither iodine-rich nor iodine-poor, relative to the proper stoichiometry for such solid electrolyte.
26 Citations
22 Claims
- 1. A process for depositing thin films of complex silver iodo solid electrolytes on a substrate, said electrolytes having good ionic conductivity at room temperature, which comprises evaporating an electrolyte material selected from the group consisting of (a) a stoichiometric complex silver iodo solid electrolyte material and (b) a mixture of the components in stoichiometric proportions of said solid electrolyte material, by flash evaporation, and wherein the vaporized products include silver-containing and iodine-containing constituents, and depositing said constituents on a heated substrate while maintaining the temperature of said heated substrate at a sufficiently elevated temperature to maintain the original stoichiometric ratio of said constituents as they recombine and deposit on said substrate to form the original solid electrolyte material.
- 9. A process for fabricating stable thin films of oxy-anion-substituted silver iodide solid electrolytes having high ionic conductivity at room temperature, on a substrate, which comprises vaporizing an electrolyte material selected from the group consisting of (a) an oxy-anion-substituted silver iodide solid electrolyte and (b) a mixture of the components in stoichiometric proportions of said last mentioned solid electrolyte, by flash evaporation, and wherein the vaporized decomposition products of said electrolyte material include silver-containing iodine-containing and oxy-anion-containing constituents, and depositing said vaporized constituents on a substrate which is maintained at a high temperature such that the net condensation of the vapors of said constituents on said substrate is in proper stoichiometric proportions to form a thin film of said oxy-anion-substituted silver iodide solid electrolyte, said solid electrolyte film being neither iodine-poor nor iodine-rich with respect to the stoichiometric proportion of iodine in said solid electrolyte.
-
19. A process for depositing thin films of complex silver iodo solid electrolytes on a substrate, said electrolytes having good ionic conductivity at room temperature, which comprises evaporating an electrolyte material selected from the group consisting of (a) a complex silver iodo solid electrolyte material and (b) a mixture of the components in stoichiometric proportions of said solid electrolyte material and wherein the vaporized products include silver-containing and iodine-containing constitutents, and depositing said constituents on a substrate while maintaining the temperature of said substrate at a sufficiently elevated temperature to maintain the original stoichiometric ratio of said constituents as they recombine and deposit on said substrate to form the original solid electrolyte material, said evaporation of said components thereof being carried out by RF sputtering at electrode potentials producing good adherence of the deposited solid electrolyte on said substrate, in the form of a film of substantially uniform thickness.
-
20. A process for fabricating stable thin films of oxy-anion-substituted silver iodide solid electrolytes having high ionic conductivity at room temperature, on a substrate, which comprises vaporizing an electolyte material selected from the group consisting of (a) an oxy-anion-substituted silver iodide solid electrolyte and (b) a mixture of the components in stoichiometric proportions of said last-mentioned solid electrolyte, by RF sputtering at potentials across the electrodes ranging from about 700 to about 900 volts, said electrolyte material maintained at a temperature below about 200°
- C, and wherein the vaporized decomposition products of said electrolyte material include silver-containing, iodine-containing and oxy-anion containing constituents, and depositing said vaporized constituents on a substrate which is maintained at a high temperature such that the net condensation of the vapors of said constituents on said substrate is in proper stoichiometric proportions to form a thin film of said oxy-anion-substituted silver iodide solid electrolyte, said solid electrolyte film being neither iodine-poor nor iodine-rich with respect to the stoichiometric proportion of iodine in said solid electrolyte, and wherein said solid electrolyte is Ag19 I15 P2 O7, or a mixture of AgI and Ag4 P2 O7 in stoichiometric proportions to form Ag19 I15 P2 O7.
-
21. A process for fabricating stable thin films of oxy-anion-substituted silver iodide solid electrolytes having high ionic conductivity at room temperature, on a substrate, which comprises vaporizing an electrolyte material selected from the group consisting of (a) an oxy-anion-substituted silver iodide solid electrolyte and (b) a mixture of the components in stoichiometric proportions of said last-mentioned solid electrolyte, by RF sputtering at potentials across the electrodes ranging from about 700 to about 900 volts, and wherein the vaporized decomposition products of said electrolyte material include silver-containing, iodine-containing and oxy-anion-containing constituents, and depositing said vaporized constituents on a substrate which is maintained at a high temperature such that the net condensation of the vapors of said constituents on said substrate is in proper stoichiometric proportions to form a thin film of said oxy-anion-substituted silver iodide solid electrolyte, said solid electrolyte film being neither iodine-poor nor iodine-rich with respect to the stoichiometric proportion of iodine in said solid electrolyte, said oxy-anion-substituted silver iodide selected from the group consisting of Ag6 I4 WO4, Ag7 I4 AsO4, Ag7 I4 VO4, Ag7 I4 PO4 and Ag19 I15 P2 O7, said substrate being maintained at a temperature ranging from about 130°
- L to about 155°
C. - View Dependent Claims (22)
- L to about 155°
Specification