Electrically conductive feature fabrication process
View Patent ↗A process for fabricating an electrically conductive feature comprising: (a) liquid depositing a low viscosity composition comprising starting ingredients including an organic anine, a silver compound, and optionally an organic acid, to result in a deposited composition; and (b) heating the deposited composition, resulting in the electrically conductive feature comprising silver.
1. A process for fabricating an electrically conductive feature comprising:
(a) liquid depositing a low viscosity composition comprising starting ingredients including an organic amine, a silver compound, and a carboxylic acid with at least 9 carbon atoms, to result in a deposited composition; and
(b) heating the deposited composition,
resulting in the electrically conductive feature comprising silver.
2. The process of claim 1 , wherein the organic amine is selected from the group consisting of ethanolamine, aminopropanol, diethanolamine, 2-methylaminoethanol, N,N-dimethylaminoethanol, methoxyethylamine, methoxypropylamine, diaminoethane, diaminopropane, diaminobutane, diaminocyclohexane, and a mixture thereof.
3. The process of claim 1 , wherein the organic amine is ethanolamine, the silver compound is silver acetate, and the carboxylic acid has at least 10 carbon atoms.
4. The process of claim 1 , wherein the carboxylic acid is selected from the group consisting of nonanoic acid, decanoic acid, citronellic acid, geranic acid, undecenoic acid, lauric acid, myristic acid, palmitric acid, oleic acid, isomers thereof, and a mixture thereof.
5. The process of claim 1 , wherein the liquid depositing is accomplished by liquid printing.
6. The process of claim 1 , wherein the low viscosity composition has a viscosity ranging from about 5 to about 500 centipoise.
7. The process of claim 1 , wherein the silver compound is selected from the group consisting of silver acetate, silver carbonate, silver chlorate, silver chloride, silver lactate, silver nitrate, silver pertafluoropropionate, silver trifluoroacetate, silver trifluoromethanesulfonate, and a mixture thereof.
8. The process of claim 1 , wherein the silver compound is silver acetate, the organic acid is a carboxylic acid with at least 10 carbon atoms, and the starting ingredients further include an alcohol.
9. The process of claim 1 , wherein the heating is performed at a temperature lower than about 250 degree C.
10. The process of claim 1 , wherein the heating is performed at a temperature lower than about 200 degree C.
11. The process of claim 1 , wherein the electrically conductive feature has a thin-film conductivity greater than about 5,000 S/cm.
12. The process of claim 1 , wherein the electrically conductive feature has a thin-film conductivity greater than about 10,000 S/cm.
13. The process of claim 1 , wherein the low viscosity composition is a solution.
14. The process of claim 1 , wherein the starting ingredients further include a Liquid selected from the group consisting of alcohol, ether, ester, water, aromatics, and a mixture thereof.
15. The process of claim 14 , wherein the alcohol is selected from the group consisting of methanol, ethanol, propanol, butanol, ethyleneglycol, methoxyethanol, ethoxyethanol, methoxypropanol, ethoxypropanol, methoxybutanol, dimethoxyglycol, and a mixture thereof.
16. A process comprising:
fabricating a thin film transistor comprising a semiconductor layer, a gate electrode; a source electrode in contact with the semiconductor layer; a drain electrode in contact with the semiconductor layer; and a gate dielectric disposed between the semiconductor layer and the gate electrode,
wherein at least one electrode selected from the group consisting of the gate electrode, the source electrode, and the drain electrode is formed by an electrode fabrication process comprising: (i) liquid depositing a low viscosity composition comprising starting ingredients including an organic amine, a silver compound, and an organic acid wherein the organic acid is a carboxylic acid with at least 9 carbon atoms, to result in a deposited composition; and (ii) heating the deposited composition, resulting in the at least one electrode comprising silver.
17. The process of claim 16 , wherein the organic amine is ethanolamine, the silver compound is silver acetate, and the carboxylic acid has at least 10 carbon atoms.