Biosensor and method of making

Abstract

An electrochemical biosensor with electrode elements that possess smooth, high-quality edges. These smooth edges define gaps between electrodes, electrode traces and contact pads. Due to the remarkable edge smoothness achieved with the present invention, the gaps can be quite small, which provides marked advantages in terms of test accuracy, speed and the number of different functionalities that can be packed into a single biosensor. Further, the present invention provides a novel biosensor production method in which entire electrode patterns for the inventive biosensors can be formed all at one, in nanoseconds—without regard to the complexity of the electrode patterns or the amount of conductive material that must be ablated to form them.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS [0001] The present application is a Continuation in Part of U.S. patent application Ser. No. 09 / 840,843, filed Apr. 24, 2001; a Continuation in Part of U.S. application Ser. No. 10 / 264,891, filed Oct. 4, 2002; a Continuation-in-Part of U.S. application Ser. No. 10 / 601,144, filed Jun. 20, 2003; and claims priority to U.S. patent application Ser. No. 60 / 480,397, filed Jun. 20, 2003, each of which is hereby incorporated by reference in its entirety.FIELD OF THE INVENTION [0002] The present invention relates to a method of making a biosensor, more specifically a biosensor having electrode sets formed by laser ablation. BACKGROUND [0003] Electrochemical biosensors are well known and have been used to determine the concentration of various analytes from biological samples, particularly from blood. Examples of such electrochemical biosensors are described in U.S. Pat. Nos. 5,413,690; 5,762,770 and 5,798,031; and 6,129,823 each of which is hereby inco...

AI Technical Summary

Benefits of technology

[0007] The present invention provides an electrochemical biosensor with electrode elements that possess smooth, high-quality edges. These smooth edges define gaps between electrodes, electrode traces and contact pads. Due to the remarkable edge smoothness achieved with the present invention, the gaps can be quite small, the advantages of which are described below. Further, the present invention provides a novel biosensor production method in which entire electrode patterns for the inventive biosensors can be formed all at one, in nanoseconds—irrespective of the complexity of the electrode patterns or the amount of conductive material that must be ablated to form them.

Problems solved by technology

This first distance varies along the length of the gap because the edge actually produced is not as smooth or perfect as the desired theoretical line.

Images