Method for the production of a hydrophilic substrate provided with a layer electrode

• US 20050191431A1
• Filed: 01/26/2005
• Published: 09/01/2005
• Est. Priority Date: 07/26/2002
• Status: Abandoned Application

• Current Assignee: Roche Diabetes Care Inc. (Roche Holding AG)
• Original Assignee: Roche Diabetes Care Inc. (Roche Holding AG)
• Inventors: Unkrig, Volker, Nortmeyer, Christine, Horn, Carina
• Application Number:
  US11/043,536
• Publication Number:
  US 20050191431A1
• Time in Patent Office: Days
• US Class Current: 427/419.1
• CPC Class Codes: C23C 26/00 Coating not provided for in groups C23C2/00 - C23C24/00
• CPC Class Codes: C23C 8/02 Pretreatment of the material to be coated C23C8/04 takes precedence
• CPC Class Codes: G01N 27/3272 Test elements therefor, i.e. disposable laminated substrates with electrodes, reagent and channels optical biosensors G01N33/52

Abstract

The present invention is generally directed towards a method for producing an analytical test strip. More particularly to a method of producing a test strip having an insulating substrate provided with a layer electrode wherein the test strip has an increased hydrophilic property.

Claims

1. A process for producing an analytical test strip having an insulating substrate, wherein the substrate has a layer electrode, the process comprising:

depositing a metallic layer on the substrate;

forming the layer electrode as a structured surface pattern on the substrate;

depositing a cover layer on the substrate and the layer electrode; and

treating the cover layer with a chemical or physical surface treatment such that the water affinity of the cover layer is increased.

2. The process as claimed in claim 1 comprising coating the substrate with aluminium as a starting material of the cover layer.

3. The process as claimed in claim 1, wherein after applying the layer electrode, the substrate is preferably provided with the cover layer over its entire surface.

4. The process as claimed in claim 1, wherein the layer electrode is geometrically structured by selectively ablating certain areas of a previously formed electrode layer.

5. The process as claimed in claim 1, wherein the layer electrode is structured when it is applied using a mask.

6. The process as claimed in claim 1, wherein the layer electrode is applied in a structured manner by a printing process.

7. The process as claimed in claim 1, wherein the layer electrode has a layer thickness of less than 10 micrometers, preferably of less than 100 nanometers.

8. The process as claimed in claim 1, wherein the layer electrode is composed of a metallic electrode material preferably of gold, platinium, palladium or iridium.

9. The process as claimed in claim 1, wherein the substrate is composed of a hydrophobic insulating material.

10. The process as claimed in claim 1, wherein the surface treatment of the cover layer is done by the action of water.

11. The process as claimed in claim 1, wherein the cover layer is composed of an inorganic starting material that can be oxidized by water and is hydrophilized by treatment with hot water or water vapour.

12. The process as claimed in claim 1, wherein the cover layer is hydrophilized by hydrolysing a phosphoric acid ester.

13. The process as claimed in claim 1, wherein the cover layer is formed with a layer thickness of less than 100 micrometers, preferably of less than 50 micrometers.

14. A process for producing an analytical test strip having an insulating layer substrate, wherein the substrate has a layer electrode, the process comprising:

depositing a cover layer on the substrate;

treating the cover layer with a chemical or physical surface treatment such that water affinity of the cover layer is increased; and

forming the layer electrode as a structured surface pattern on the substrate.

15. The process as claimed in claim 14, wherein the step of treating the cover layer is prior to the step of forming the layer electrode.

16. The process as claimed in claim 14, wherein the step of treating the cover layer is after the step of forming the layer electrode.