Thixotropic composition
AssigneeXerox Corporation
InventorsYiliang Wu, Ping Liu, Anthony James Wigglesworth
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Abstract
A thixotropic conductive composition is disclosed that can be used to form conductive features on an electronic device. The thixotropic composition comprises a conjugated polymer, a solvent, and multi-wall carbon nanotubes. The conjugated polymer and the solvent are capable of forming a thixotropic fluid. This enables excellent stability of the carbon nanotubes in the composition at a very high loading. The composition has a long shelf life.
Claims20
A conductor composition, comprising:
- a solvent;
- a polythiophene conjugated polymer of Formula (II):
- wherein m is from 2 to about 2,500;
- and
- multi-wall carbon nanotubes;
- wherein the solvent and the conjugated polymer form a thixotropic fluid;
- and
- wherein the multi-wall carbon nanotubes are at least 50 wt % of all solids in the conductor composition, and wherein the weight ratio of the multi-wall carbon nanotubes to the conjugated polymer is at least 2:1.
A conductive film, comprising:
- a polythiophene conjugated polymer of Formula (II):
- wherein m is from 2 to about 2,500;
- and
- multi-wall carbon nanotubes;
- wherein the multi-wall carbon nanotubes are at least 50 wt % of the conductive film, and wherein the weight ratio of the multi-wall carbon nanotubes to the conjugated polymer is at least 2:1;
- and
- wherein the film has a thickness of from about 40 nanometers to about 1 micrometer.
An electronic device comprising a conductive layer made from a conductor composition that comprises:
- a solvent;
- a polythiophene conjugated polymer of Formula (II):
- wherein m is from 2 to about 2,500;
- and
- multi-wall carbon nanotubes;
- wherein the solvent and the conjugated polymer form a thixotropic fluid, wherein the multi-wall carbon nanotubes are at least 50 wt % of the conductive layer, and wherein the weight ratio of the multi-wall carbon nanotubes to the conjugated polymer is at least 2:1.
Dependencies are inferred from the claim text.