Polymer mixtures for printed polymer electronic circuits

• US 7,678,857 B2
• Filed: 08/31/2004
• Issued: 03/16/2010
• Est. Priority Date: 09/03/2003
• Status: Expired due to Fees

• Current Assignee: PolyIC GmbH & Co. KG (Leonhard KURZ Stiftung & Company KG)
• Original Assignee: PolyIC GmbH & Co. KG (Leonhard KURZ Stiftung & Company KG)
• Inventors: Knobloch, Alexander Friedrich, Bernds, Adolf, Clemens, Wolfgang, Ullmann, Andreas
• Primary Examiner(s): Lipman; Bernard
• Application Number:
  US10/569,233
• Publication Number:
  US 20070017401A1
• Time in Patent Office: 2,023 Days
• Field of Search: 524/517, 524/521
• US Class Current: 524/517
• CPC Class Codes: C08L 101/12 characterised by physical features, e.g. anisotropy, viscosity or electrical conductivity liquid crystal materials or compositions C09K19/00
• CPC Class Codes: H10K 10/464 Lateral top-gate IGFETs comprising only a single gate
• CPC Class Codes: H10K 10/466 Lateral bottom-gate IGFETs comprising only a single gate
• CPC Class Codes: H10K 71/12 using liquid deposition, e.g. spin coating
• CPC Class Codes: H10K 85/113 Heteroaromatic compounds comprising sulfur or selene, e.g. polythiophene

Abstract

In order to increase the viscosity of semiconductive polymers in solution, they are mixed with non-semiconductive polymers.

Claims

1. A printable polymer mixture for the preparation of a double layer comprising a semiconductor layer and a non-semiconductive layer wherein the mixture exhibits semiconductive properties, the mixture comprising:

one or more semiconductive polymers; and

one or more non-semiconductive polymers,

in a solution comprising a non-electrolytic solvent to form said printable mixture and said double layer.

2. The polymer mixture as claimed in claim 1 wherein the semiconductive polymers include at least one of the group consisting of polythiophene, polyfluorene or polythienylenevinylene.

3. The polymer mixture as claimed in claim 1 wherein the non-semiconductive polymers are selected from the group consisting of at least one of polystyrene, polymethyl methacrylate, cymel or poly isobutyl.

4. The polymer mixture as claimed in claim 1 wherein said solvent includes at least one of chloroform, toluene, ketones, dioxane or heptane.

5. The polymer mixture as claimed in claim 1 wherein the mixture it additionally contains molecules which are smaller than polymers, in particular oligomers, conductive molecules or semiconductive molecules.

6. The polymer mixture as claimed in claim 1 wherein the mixture further includes additives.

7. The polymer mixture as claimed in claim 1 wherein the mixture has a viscosity of more than 8 mpa·

s.

8. A printing process for the production of a semiconductive double layer by a known process, selected from the group consisting of at least one of screen printing, flexographic printing, offset printing, gravure printing and/or pad printing process, the polymer mixture as claimed in claim 1 being used as a print medium in the known process.

9. A printing process for the production of a semiconductive double layer by a known process, selected from the group consisting of screen printing, flexographic printing, offset printing, gravure printing and/or pad printing process, the double layer produced by printing a printing medium comprising the polymer mixture of claim 1 for forming

the one or more semiconductive polymers in a first of its layers, and

the one or more non-semiconductive polymers in a second of its layers.

10. An electronic component which is produced using a polymer mixture as claimed in claim 1.

11. An electronic component which is produced using a polymer mixture that forms a double layer as claimed in claim 9.

12. An electronic component which is produced using a polymer mixture as claimed in claim 2.

13. An electronic component which is produced using a polymer mixture as claimed in claim 3.

14. An electronic component which is produced using a polymer mixture as claimed in claim 4.

15. An electronic component which is produced using a polymer mixture as claimed in claim 5.

16. An electronic component which is produced using a polymer mixture as claimed in claim 6.

17. An electronic component which is produced using a polymer mixture as claimed in claim 7.

18. A printing process for the production of a semiconductive double layer by a known process, selected from the group consisting of screen printing, flexographic printing, offset printing, gravure printing and/or pad printing process, the double layer produced by printing a printing medium comprising the polymer mixture of claim 2 for forming

the one or more semiconductive polymers in a first of its layers, and

the one or more non-semiconductive polymers in a second of its layers.

19. A printing process for the production of a semiconductive double layer by a known process, selected from the group consisting of screen printing, flexographic printing, offset printing, gravure printing and/or pad printing process, the double layer produced by printing a printing medium comprising the polymer mixture of claim 3 for forming

the one or more semiconductive polymers in a first of its layers, and

the one or more non-semiconductive polymers in a second of its layers.

20. An electronic component comprising:

a substrate; and

on the substrate;

a polymer mixture, the polymer mixture comprising first and second materials having respective semiconductive and non-semiconductive properties, the mixture comprising;

one or more semiconductive polymers, and

one or more non-semiconductive polymers,

wherein the semiconductive and non-semiconductive polymers separate from one another after deposition on the substrate forming separate and discrete semiconductor and non-semiconductor layers on the substrate.