Patent ID: 8702966

Claim:
A biosensor, in which a working electrode and a reference electrode are formed on an inner surface of a lower insulating substrate, a reagent reaction layer is fixed on the inner surface of the lower insulating substrate along a sample path to be in contact with the working electrode and the reference electrode, and an upper insulating substrate is assembled with the lower insulating substrate with a spacer interposed therebetween to form the sample path, wherein a code electrode outputs an electrical signal according to a reaction between a sample and the reaction reagent layer, and provides the electrical signal to a measuring device, wherein the code electrode comprises a code pattern portion, formed by patterning the code electrode at a position which is in contact with the reagent reaction layer, wherein an area of the code pattern portion is varied according to sensor information, wherein the code electrode is configured to output the electrical signal according to the sensor information, and wherein the code pattern portion is patterned by removing a predetermined area of the code electrode such that the contact area with the reagent reaction layer, in which reaction current flows, differs according to a code assigned to a corresponding biosensor based on the sensor information.