ELECTRODE ARRANGEMENTS FOR BIOSENSORS
First Claim
Patent Images
1. A biosensor, comprising:
- a support substrate extending between opposite first and second ends and opposite first and second edges;
a spacer substrate positioned on the support substrate, the spacer substrate including an inner edge extending along the support substrate between one or both of the first and second ends and the first and second edges;
a cover cooperating with the spacer substrate, the inner edge of the spacer substrate defining a boundary of a capillary channel; and
at least one working electrode in the capillary channel, and the working electrode including a width and a main body portion extending along a length transversely to the width between opposite ends of the main body portion, the main body portion including at least two working electrode portions positioned along the length of the main body portion in the capillary channel with the at least two working electrode portions connected by at least one connecting portion, the working electrode further including at least one connective neck extending from at least one of the opposite ends of the main body portion and across the inner edge of the spacer substrate, wherein the two working electrode portions each define a minimum width that is greater than a maximum width of the connective neck, and the connecting portion defines a maximum width that is less than a minimum width of the connective neck.
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Abstract
The present invention relates to a biosensor. The biosensor includes a support substrate, electrodes positioned on the support substrate, a spacer substrate positioned on the support substrate, and a cover positioned on the spacer substrate. The cover cooperates with the support substrate to define a capillary channel. The electrodes include at least one working electrode defining a working electrode area in the capillary channel. The working electrode is configured to minimize variation in the working electrode area in the capillary channel due to variations in the spacer substrate placement relative to the working electrode.
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Citations
21 Claims
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1. A biosensor, comprising:
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a support substrate extending between opposite first and second ends and opposite first and second edges; a spacer substrate positioned on the support substrate, the spacer substrate including an inner edge extending along the support substrate between one or both of the first and second ends and the first and second edges; a cover cooperating with the spacer substrate, the inner edge of the spacer substrate defining a boundary of a capillary channel; and at least one working electrode in the capillary channel, and the working electrode including a width and a main body portion extending along a length transversely to the width between opposite ends of the main body portion, the main body portion including at least two working electrode portions positioned along the length of the main body portion in the capillary channel with the at least two working electrode portions connected by at least one connecting portion, the working electrode further including at least one connective neck extending from at least one of the opposite ends of the main body portion and across the inner edge of the spacer substrate, wherein the two working electrode portions each define a minimum width that is greater than a maximum width of the connective neck, and the connecting portion defines a maximum width that is less than a minimum width of the connective neck. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A biosensor, comprising:
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a support substrate extending between opposite first and second ends and opposite first and second edges; a spacer substrate positioned on the support substrate, the spacer substrate including an inner edge extending along the support substrate, the inner edge being located between the first and second ends and the first and second edges of the support substrate; a cover cooperating with the spacer substrate, the inner edge of the spacer substrate defining a boundary of a capillary channel; and at least one working electrode that includes a main body portion defining a width and a length transverse to the width between opposite ends of the main body portion, the length and width being sized so that the main body portion is located in the capillary channel, the working electrode further including first and second connective necks that each extend from a respective one of the opposite ends of the main body portion and across the inner edge of the spacer substrate, the main body portion defining a minimum width that is greater than a maximum width of each of the first and second necks, wherein each of the first and second connective necks extends from the main body portion to an electrode lead on the support substrate so that each of the first and second connective necks provides an electrical connection between the working electrode and at least one contact configured to connect the biosensor to a meter. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A biosensor, comprising:
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a support substrate extending between opposite first and second ends and opposite first and second edges; a spacer substrate positioned on the support substrate, the spacer substrate including an inner edge extending along the support substrate, the inner edge extending from the first edge to the second edge adjacent the first end of the support substrate; a cover cooperating with the spacer substrate, the inner edge of the spacer substrate defining a boundary of a capillary channel; and at least one working electrode in the capillary channel, and the working electrode includes a main body portion within the capillary channel having a length that extends toward the first and second edges, the working electrode further including a connective neck extending from an end of and transversely to the main body portion toward the second end of the support substrate, wherein the inner edge is spaced from the main body portion and extends across the connective neck where the connective neck is oriented toward the second end of the support substrate. - View Dependent Claims (17, 18, 19, 20, 21)
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Specification