Conductive compositions comprising metal carboxylates

Patent metadata

Field	Value
Publication number	US-9540734-B2
Application number	US-201314079533-A
Country	US
Kind code	B2
Filing date	Nov 13, 2013
Priority date	Nov 13, 2013
Publication date	Jan 10, 2017
Grant date	Jan 10, 2017

Abstract

A conductive composition that comprises a branched metal carboxylate and one or more solvents. The solvents may be an aromatic hydrocarbon solvent. In embodiments, the branched metal carboxylate is a silver carboxylate. The conductive composition may be used in forming conductive features on a substrate, including by inkjet printing, screen printing or offset printing.

First claim

What is claimed is:

1. A conductive composition comprising:
a reaction mixture;
a branched metal carboxylate present in an amount of from about 5 to about 70 percent by weight of the total weight of the conductive composition, wherein the metal for the branched metal carboxylate is selected from the group consisting of silver, palladium, copper, gold, nickel, or mixtures thereof;
a first solvent being an aromatic hydrocarbon solvent in which the branched metal carboxylate is soluble, wherein the aromatic hydrocarbon solvent is selected from the group consisting of toluene, xylene, trimethylbenzene, ethyl benzene, diethylbenzene, methylethylbenzene, tetrahydronaphthalene, methylnaphthalene, propylbenzene, butylbenzene, methyl propylbenzene, cumene and mixtures thereof; and
a second solvent being an aliphatic solvent in which the branched metal carboxylate is soluble;
wherein the reaction mixture comprises the first solvent and the second solvent,
wherein the conductive composition has a viscosity ranging from about 1 to about 3,000 cps at room temperature, and
wherein the viscosity of the conductive composition is selected by controlling the amount of second solvent relative to the amount of first solvent in the reaction mixture.

2. The conductive composition of claim 1 , wherein the branched silver carboxylate comprises 6 to 18 carbon atoms.

3. The conductive composition of claim 1 , wherein the branched silver carboxylate is silver neodecanoate.

4. The conductive composition of claim 1 , wherein aliphatic solvent is selected from the group consisting decalin, terpineol, cyclohexane, dodecane, tetradecane, heptane, decane, decene, Isopar G, Isopar M, and mixtures thereof.

5. The conductive composition of claim 1 , wherein the first and second solvents are present in a combined amount of from about 5 to about 80 percent by weight of the total weight of the conductive composition.

6. The conductive composition of claim 1 being a jettable composition having a viscosity of from about 2 to about 1000 cps at a jetting temperature of from about 20 to about 95° C.

7. The conductive composition of claim 1 having a sintering temperature of from about 100 to about 250° C.

8. The conductive composition of claim 1 further including a carboxylic acid additive.

9. The conductive composition of claim 8 , wherein the carboxylic acid additive comprises from about 6 to about 18 carbon atoms.

10. The conductive composition of claim 9 , wherein the carboxylic acid additive is neodecanoic acid.

11. The conductive composition of claim 8 , wherein the carboxylic acid additive is present in an amount of from about 0.05 to 5 wt % of the total weight of the conductive composition.

12. A conductive composition comprising:
a branched metal carboxylate present in an amount of from about 5 to about 70 percent by weight of the total weight of the conductive composition;
a first solvent being an aromatic hydrocarbon solvent in which the branched metal carboxylate is soluble; and
a second solvent in which the branched metal carboxylate is soluble, wherein a composition at a near saturated concentration formed from the first solvent and the metal carboxylate has a low viscosity and a composition at a near saturated concentration formed from the second solvent and the branched metal carboxylate has a high viscosity, and further wherein the conductive composition has a viscosity of from about 2 cps to about 3000 cps at room temperature, and a surface tension from about 25 mN/m to about 40 mN/m.

13. The conductive composition of claim 12 , wherein the composition at a near saturated concentration formed from the first solvent and the metal carboxylate has a viscosity of from about 0.9 to about 10 cps, and the composition at a near saturated concentration formed from the second solvent and the metal carboxylate has a viscosity of from about 80 to about 3,000 cps at room temperature.

14. The conductive composition of claim 12 , wherein the branched metal carboxylate forms a dimer, trimer, oligomer, or polymer in the second solvent at a near saturated concentration.

15. A process for forming a conductive feature comprising:
providing a conductive composition comprising
a branched metal carboxylate present in an amount of from about 20 to about 50 percent by weight of the total weight of the conductive composition,
a first solvent being an aromatic hydrocarbon solvent in which the branched metal carboxylate is soluble, and
a second solvent in which the branched metal carboxylate is soluble, wherein a composition at a near saturated concentration formed from the first solvent and the metal carboxylate has a low viscosity at room temperature, and a composition at a near saturated concentration formed from the second solvent and the branched metal carboxylate has a high viscosity at room temperature;

liquid depositing the conductive composition onto a substrate; and
annealing the conductive composition to the substrate to form the conductive feature.

16. The process of claim 15 , wherein the liquid deposition is performed by a printing process selected from the group consisting of inkjet printing, aerosol jet printing, gravure printing, flexography printing, screen printing, offset printing, and mixtures thereof or by a non-printing process selected from the group consisting of spin coating, dip coating, bar coating, and mixtures thereof.

Assignees

• Xerox Corp

Inventors

• Wu Yiliang
• Liu Ping

Classifications

• C23C18/143

  Radiation by light, e.g. photolysis or pyrolysis · CPC title

• B41M5/0047

  by ink-jet printing · CPC title

• C23C18/08 Primary

  characterised by the deposition of metallic material · CPC title

• B41M7/009

  using thermal means, e.g. infrared radiation, heat · CPC title

• B41M3/006

  Patterns of chemical products used for a specific purpose, e.g. pesticides, perfumes, adhesive patterns; use of microencapsulated material; Printing on smoking articles · CPC title