Conducting inks

• US 7,097,788 B2
• Filed: 06/30/2003
• Issued: 08/29/2006
• Est. Priority Date: 06/30/2003
• Status: Expired due to Fees

• Current Assignee: Board of Trustees of The University of Illinois
• Original Assignee: Board of Trustees of The University of Illinois
• Inventors: Schricker, April Dawn, Kirkor, Ewa Stanislawa, Scheeline, Alexander
• Primary Examiner(s): Kopec, Mark
• Application Number:
  US10/610,363
• Publication Number:
  US 20040262582A1
• Time in Patent Office: 1,156 Days
• Field of Search: 252/500, 252/502, 252/511, 252/512, 427/331, 427/355, 427/369
• US Class Current: 252/502
• CPC Class Codes: B82Y 10/00 Nanotechnology for information processing, storage or transmission, e.g. quantum computing or single electron logic
• CPC Class Codes: B82Y 30/00 Nanotechnology for materials or surface science, e.g. nanocomposites
• CPC Class Codes: C09D 11/30 Inkjet printing inks
• CPC Class Codes: C09D 11/52 Electrically conductive inks
• CPC Class Codes: C12Q 1/004 mediator-assisted
• CPC Class Codes: H05K 1/095 for polymer thick films, i.e. having a permanent organic polymeric binder
• CPC Class Codes: H05K 2201/0281 Conductive fibers
• CPC Class Codes: H05K 2201/0323 Carbon
• CPC Class Codes: H05K 2201/0329 Intrinsically conductive polymer [ICP]; Semiconductive polymer
• CPC Class Codes: H05K 2203/0271 Mechanical force other than pressure, e.g. shearing or pulling
• CPC Class Codes: H05K 2203/105 Using an electrical field; Special methods of applying an electric potential electroplating H05K2203/0723
• CPC Class Codes: H05K 3/12 using thick film techniques, e.g. printing techniques to apply the conductive material or similar techniques for applying conductive paste or ink patterns

Abstract

A method of increasing conductivity of an ink, comprises orienting particles in the ink. The ink comprises the particles and solvent, and the particles are conductive anisotropic particles.

Claims

1. A method of increasing conductivity of an ink, comprising:

rubbing the ink to increase conductivity of the ink;

followed by conducting electricity through the ink,

wherein the ink comprises conductive non-spherical particles comprising carbon, and a solvent,

the ink is on a substrate, and

the method is carried out without curing at a temperature of at least 50°

C. between the rubbing and the conducting.

2. The method of claim 1, wherein the ink further comprises a binder.

3. The method of claim 1, wherein the particles are selected from the group consisting of graphite, carbon fibers and nanotubes.