Encoded biosensors and methods of manufacture and use thereof

摘要

An analyte test sensor strip is disclosed having information coded thereon as well as a method of forming the same and conducting an analyte test using the analyte test sensor strip. Information relating to an attribute of the strip or batch/lot of strips may be coded based on resistance values pertaining to electrical aspects of the strip, such as a primary resistive element and a secondary resistive element, the secondary resistive element having one of a plurality of states defined by a location of a closed tap to form a unique resistive path for the secondary resistive element that includes a portion of the primary resistive element depending on the location of the closed tap. The states may be formed on the strip by a secondary processing step in the manufacture of the strip in which a plurality of taps are severed leaving only one tap in a closed state.

主权项

1. An analyte test sensor strip, comprising:
a non-conductive substrate; a plurality of measurement electrodes formed on the non-conductive substrate, wherein the plurality of measurement electrodes comprises at least a working electrode and a counter electrode; a reagent bridging the working electrode and the counter electrode; an information circuit formed on the non-conductive substrate, the information circuit comprising: a primary resistive element having a first end and a second end having a predetermined configuration between the first and second ends, wherein the primary resistive element has a resistance falling within a first predetermined range, and a secondary resistive element between the first end of the primary resistive element and a third end, wherein the secondary resistive element comprises a plurality of closed taps, wherein the closed taps selectively connect the third end with the primary resistive element each at a predetermined location thereby defining a plurality of selectable, unique resistive paths between the first end and the third end through at least a portion of the primary resistive element, wherein each of the plurality of selectable, unique resistive paths has a second resistance falling within a second predetermined range; and a plurality of contact pads formed on the non-conductive substrate, wherein at least a first contact pad of the plurality of contact pads is connected to the first end of the primary resistive element, a second contact pad of the plurality of contact pads is connected to the second end of the primary resistive element, and a third contact pad of the plurality of contact pads is connected to a portion of the secondary resistive element; wherein a ratio of the first resistance and the second resistance selectively correlates to an attribute of the analyte test sensor strip.