Method of making a biosensor

• US 7,476,827 B1
• Filed: 10/29/2004
• Issued: 01/13/2009
• Est. Priority Date: 08/29/2001
• Status: Active Grant

• Current Assignee: Roche Diabetes Care Inc. (Roche Holding AG)
• Original Assignee: Roche Diagnostics Operations Incorporated (Roche Holding AG)
• Inventors: Bhullar, Raghbir S., Groll, Henning, Austera, John T., Pauley, James L. Jr., Walling, Douglas P., Ranney, Timothy L.
• Primary Examiner(s): Evans; Geoffrey S
• Application Number:
  US10/976,740
• Publication Number:
  US 20080314882A1
• Time in Patent Office: 1,537 Days
• Field of Search: 219/121.69, 427/555, 427/556
• US Class Current: 219/121.69
• CPC Class Codes: G01N 2035/00811 consumable or exchangeable components other than sample carriers, e.g. detectors, flow cells
• CPC Class Codes: G01N 27/3272 Test elements therefor, i.e. disposable laminated substrates with electrodes, reagent and channels optical biosensors G01N33/52
• CPC Class Codes: G01N 33/48771 Coding of information, e.g. calibration data, lot number
• CPC Class Codes: G01N 33/5438 Electrodes

Abstract

The present invention relates to a method of forming a biosensor. The method includes providing a substrate coated with a electrically conductive material, ablating the electrically conductive material to form electrodes and a code pattern, wherein there is sufficient contrast between the conductive coating and the substrate such that the code pattern is discernible, and applying a reagent to at least one of the electrodes.

Claims

1. A method of forming a biosensor, the method comprising the steps of:

providing a flexible substrate coated with an electrically conductive material,

ablating through the electrically conductive material to expose the substrate in a pre-defined pattern so as to form a pattern of electrodes and a code pattern electrically isolated from the electrodes, wherein there is sufficient contrast between the conductive material and the exposed substrate such that the code pattern is discernible, and

applying a reagent to at least one of the electrodes.

2. The method of claim 1 wherein the ablating step includes the step of laser ablating the electrically conductive material.

3. The method of claim 1 wherein the ablating step includes forming a bar code shaped code pattern.

4. The method of claim 1 wherein the ablating step includes forming a code pattern that includes pads isolated from the surrounding electrically conductive material.