Silver nanoparticle ink composition for highly conductive features with enhanced mechanical properties
View Patent ↗A conductive ink composition comprising organic-stabilized silver nanoparticles and a solvent, and a polyvinyl alcohol derivative resin of Formula (1) wherein R 1 is a chemical bond or a divalent hydrocarbon linkage having from about 1 to about 20 carbons; R 2 and R 3 are independently an alkyl, an aromatic or substituted aromatic group having from about 1 to about 20 carbon atoms; x, y and z represent the proportion of the corresponding repeat units respectively expressed as a weight percent, wherein each repeat unit is randomly distributed along polymer chain, and the sum of x, y and z is about 100 weight percent, and wherein the polyvinyl alcohol derivative resin is present in an amount of from 0.1 to about 5 weight percent of the ink composition.
1. A conductive ink composition comprising organic-stabilized silver nanoparticles and a solvent, and a polyvinyl alcohol derivative resin of Formula (1)
wherein R 1 is a chemical bond or a divalent hydrocarbon linkage having from about 1 to about 20 carbons; R 2 and R 3 are independently an alkyl, an aromatic or substituted aromatic group having from about 1 to about 20 carbon atoms; x, y and z represent the proportion of the corresponding repeat units respectively expressed as a weight percent, wherein each repeat unit is randomly distributed along polymer chain, wherein x is from about 5 to about 15, y is from about 80 to about 95 and z is from 0 to about 5, and the sum of x, y and z is about 100 weight percent, and
wherein the polyvinyl alcohol derivative resin is present in an amount of from 0.1 to about 5 weight percent of the ink composition.
2. The conductive ink composition of claim 1 , wherein a viscosity of the ink composition is from about 2 cps to about 200 cps.
3. The conductive ink composition of claim 1 , wherein y is at least about 88.
4. The conductive ink composition of claim 1 , wherein R 1 is a covalent chemical bond, R 2 is a propyl group, and R 3 is a methyl group.
5. The conductive ink composition of claim 1 , wherein R 1 is a single chemical bond, and R 2 and R 3 are each an alkyl group having from about 1 to about 20 carbon atoms.
6. The conductive ink composition of claim 1 , Wherein the stabilizer for the silver nanoparticles is an organoamine stabilizer selected from the group consisting of butylamine, pentylamine, hexylamine, heptylamine, octylamine, nonylamine, decylamine, hexadecylamine, undecylamine, dodecylamine, tridecylamine, tetradecylamine, diaminopentane, diaminohexane, diaminoheptane, diaminooctane, diaminononane, diaminodecane, diaminooctane, dipropylamine, dibutylamine, dipentylamine, dihexylamine, diheptylamine, dioctylamine, dinonylamine, didecylamine, methylpropylamine, ethylpropylamine, propylbutylamine, ethylbutylamine, ethylpentylamine, propylpentylamine, butylpentylamine, tributylamine, trihexylamine and mixtures thereof.
7. The conductive ink composition of claim 1 , wherein the stabilizer for the silver nanoparticles is dodecylamine.
8. The conductive ink composition of claim 1 , wherein the solvent is selected from the group consisting of an aromatic hydrocarbon solvent, an isoparaffinic hydrocarbon solvent, naphthenic oils, an alcohol, an alkane or an alkene comprised of from about 8 to about 18 carbon atoms and mixtures thereof.
9. The conductive ink composition of claim 1 , herein the solvent is a mixture comprised of at least one alcohol selected from the group consisting of terpineol, hexanol, heptanol, cyclohexanol and 3,7-dimethylocta-2,6-dien-1ol, 2 (2 propyl)-5-methyl-cyclohexane-1-ol, and at least one hydrocarbon solvent selected from the group consisting of decalin, hexadecane, hexadecene and 1,2,4-trimethylbenzene.
10. The conductive ink composition of claim 1 , wherein the solvent is present in the silver ink composition in an amount from about 10 to about 90 percent by weight of the silver ink composition.
11. The conductive ink composition of claim 1 , wherein the organic-stabilized silver nanoparticles in the ink composition are present in an amount from about 20 to about 80 weight percent.
12. A conductive ink composition comprising a silver nanoparticle solution including organic-stabilized silver nanoparticles, a solvent, and a polyvinyl alcohol derivative resin of Formula (1)
wherein R 1 is a chemical bond or a divalent hydrocarbon linkage having from about 1 to about 20 carbons; R 2 and R 3 are independently an alkyl, an aromatic or substituted aromatic group having from about 1 to about 20 carbon atoms; x, y and z represent h proportion of the corresponding repeat units respectively expressed as a weight percent, wherein each repeat unit is randomly distributed along polymer chain, wherein x is about 5 to about 25, y is from about 75 to about 95 and z is from 0 to about 10, and the sum of x, y and z is about 100 weight percent,
wherein the polyvinyl alcohol derivative resin is present in an amount of from 0.1 to about 5 weight percent of the ink composition, and
wherein the polyvinyl alcohol derivative resin has a weight average molecular weight of from about 50,000 to about 250,000 Daltons.
13. The conductive ink composition of claim 12 , Wherein the stabilizer for the silver nanoparticles is an organoamine stabilizer selected from the group consisting of butylamine, pentylamine, hexylamine, heptylamine, octylamine, nonylamine, decylamine, hexadecylamine, undecylamine, dodecylamine, tridecylamine, tetradecylamine, diaminopentane, diaminohexane, diaminoheptane, diaminooctane, diaminononane, diaminodecane, diaminooctane, dipropylamine, dibutylamine, dipentylamine, dihexylamine, diheptylamine, dioctylamine, dinonylamine, didecylamine, methylpropylamine, ethylpropylamine, propylbutylamine, ethylbutylamine, ethylpentylamine, propylpentylamine, butylpentylamine, tributylamine, trihexylamine and mixtures thereof.
14. The conductive ink composition of claim 12 , wherein the solvent is selected from the group consisting of an aromatic hydrocarbon solvent, an isoparaffinic hydrocarbon solvent, naphthenic oils, an alcohol, an alkane or an alkene comprised of from about 8 to about 18 carbon atoms and mixtures thereof.
15. The conductive ink composition of claim 12 , wherein the solvent is a mixture comprised of at least one alcohol selected from the group consisting of terpineol, hexanol, heptanol, cyclohexanol and 3,7-dimethylocta-2,6-dien-1ol, 2 (2 propyl)-5-methyl-cyclohexane-1-ol, and at least one hydrocarbon solvent selected from the group consisting of decalin, hexadecane, hexadecene and 1,2,4-trimethylbenzene.
16. A method of forming conductive features on a substrate, the method comprising:
providing a silver ink composition comprised of a silver nanoparticle particle solution including organic-stabilized silver nanoparticles, a solvent and polyvinyl alcohol derivative resin of Formula (1)
wherein R 1 is a chemical bond or a divalent hydrocarbon linkage having from about 1 to about 20 carbons; R 2 and R 3 are independently an alkyl, an aromatic or substituted aromatic group having from about 1 to about 20 carbon atoms; x, y and z represent the proportion of the corresponding repeat units respectively expressed as a weight percent, wherein each repeat unit is randomly distributed along polymer chain, wherein is x from about 5 to about 15, y is from about 80 to about 95 and z is from 0 to about 5, and the sum of x, y and z is about 100 weight percent, and
wherein the polyvinyl alcohol derivative resin is present in an amount of from 0.1 to about 5 weight percent of the silver ink composition,
depositing the silver ink composition onto the substrate to form deposited features, and
heating the deposited features on the substrate to a temperature from about 80° C. to about 160° C. to form conductive silver features on the substrate.
17. The method of claim 16 , wherein the stabilizer for the silver nanoparticles is an organoamine stabilizer selected from the group consisting of butylamine, pentylamine, hexylamine, heptylamine, octylamine, nonylamine, decylamine, hexadecylamine, undecylamine, dodecylamine, tridecylamine, tetradecylamine, diaminopentane, diaminohexane, diaminoheptane, diaminooctane, diaminononane, diaminodecane, diaminooctane, dipropylamine, dibutylamine, dipentylamine, dihexylamine, diheptylamine, dioctylamine, dinonylamine, didecylamine, methylpropylamine, ethylpropylamine, propylbutylamine, ethylbutylamine, ethylpentylamine, propylpentylamine, butylpentylamine, tributylamine, trihexylamine and mixtures thereof.
18. The method of claim 16 , wherein the stabilizer for the silver nanoparticles is dodecylamine.
19. The method of claim 16 , wherein the solvent is selected from the group consisting of an aromatic hydrocarbon solvent, an isoparaffinic hydrocarbon solvent, naphthenic oils, an alcohol, an alkane or an alkene comprised of from about 8 to about 18 carbon atoms and mixtures thereof.
20. The method of claim 16 , wherein the depositing is select from the group consisting of spin coating, blade coating, rod coating, dip coating, lithography or offset printing, gravure, flexography, screen printing, stencil printing, inkjet printing, and stamping.