Electrochemical sensor

• US 7,122,102 B2
• Filed: 05/29/2002
• Issued: 10/17/2006
• Est. Priority Date: 06/11/2001
• Status: Active Grant

• Current Assignee: Ascensia Diabetes Care Holdings AG (PHC Holdings Corporation)
• Original Assignee: Bayer Healthcare LLC (Bayer AG)
• Inventors: Wogoman, Frank W.
• Primary Examiner(s): NOGUEROLA, ALEXANDER STEPHAN
• Application Number:
  US10/156,572
• Publication Number:
  US 20020185375A1
• Time in Patent Office: 1,602 Days
• Field of Search: 204/400, 204/403, 204/416, 204/418, 204/429, 204/403.01, 204/403.15
• US Class Current: 204/400
• CPC Class Codes: G01N 27/3272 Test elements therefor, i.e. disposable laminated substrates with electrodes, reagent and channels optical biosensors G01N33/52

Abstract

An electrochemical sensor with a capillary channel is formed by placing a sacrificial insert on a sensor base and applying casting material. After the casting material is cured, the sacrificial is removed leaving a capillary channel in the sensor. The insert may be removed by a tool including a clamp for clamping and holding the insert stationary and a sliding block to which the sensor is secured.

Claims

1. An electrochemical sensor, comprising:

a sensor base including a screen-printed active area with at least one electrode;

a sacrificial insert on said sensor base; and

casting material on said sensor base and over said sacrificial insert, said casting material of a formulation which allows for mechanical removal of said sacrificial insert from said casting material and said sensor base leaving a capillary channel in said casting material,

wherein said sacrificial insert is adapted to he mechanically removed to form the capillary channel.

2. The electrochemical sensor of claim 1 wherein the at least one electrode is a plurality of electrodes and wherein the plurality of electrodes is in said capilary channel.

3. The electrochemical sensor of claim 1 further comprising a reagent in said capillary channel.

4. The electrochemical sensor of claim 1 wherein said capillary channel has a height of about 0.005 inch.