Electrochemical sensor and method of making

• US 20020185375A1
• Filed: 05/29/2002
• Published: 12/12/2002
• 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.
• Granted Patent: US 7,122,102 B2
• Time in Patent Office: Days
• US Class Current: 204/403.01
• 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. A method of making a capillary channel in an electrochemical biosensor, comprising:

forming a base member;

placing an insert on said base member;

applying casting material over said insert and said cavity; and

removing said insert leaving a capillary channel with a lid.

2. The method of making a capillary channel in an electrochemical biosensor claimed in claim 1 comprising providing a reagent in said cavity.

3. The method of making a capillary channel in an electrochemical biosensor claimed in claim 1 comprising providing electrodes in said cavity.

4. The method of making a capillary channel in an electrochemical biosensor claimed in claim 1 comprising curing said casting material prior to removing said insert.

5. An electrochemical sensor, comprising:

a sensor base,

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 removal of said sacrificial insert from said casting material and said sensor base leaving a capillary channel in said casting material.

6. The electrochemical sensor claimed in claim 5 further comprising at least one electrode in said capillary channel.

7. The electrochemical sensor claimed in claim 5 further comprising a reagent in said capillary channel.