Polymer mixtures for printed polymer electronic circuits

• US 20070017401A1
• Filed: 08/31/2004
• Published: 01/25/2007
• Est. Priority Date: 09/03/2003
• Status: Active Grant

• Current Assignee: PolyIC GmbH & Co. KG (Leonhard KURZ Stiftung & Company KG)
• Original Assignee: PolyIC GmbH & Co. KG (Leonhard KURZ Stiftung & Company KG)
• Inventors: Bernds, Adolf, Clemens, Wolfgang, Knobloch, Alexander, Ullmann, Andreas
• Granted Patent: US 7,678,857 B2
• Time in Patent Office: Days
• US Class Current: 101/489
• 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 polymer mixture, the polymer mixture having semiconductive properties, the mixture comprising:

one or more semiconductive polymers; and

one or more non-semiconductive polymers.

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

4. The polymer mixture as claimed in claim 1 including solvents including at least one of chloroform, toluene, ketones, dioxane and/or heptane.

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

6. The polymer mixture as claimed in claim 1 wherein it further includes of customary additives.

7. The polymer mixture as claimed in claim 1 wherein it 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.

10. The printing process for the production of a double layer as claimed in claim 9, in which a polymer mixture as claimed in claim 1 is used.

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

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

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

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

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

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

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

19. The printing process for the production of a double layer as claimed in claim 9, in which a polymer mixture as claimed in claim 2 is used.

20. The printing process for the production of a double layer as claimed in claim 9, in which a polymer mixture as claimed in claim 3 is used.

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 the printing medium containing

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

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

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