Electrode configuration for a biosensor
First Claim
1. A biosensor, comprising:
- a capillary chamber having an inner boundary;
a working electrode including an effective working electrode portion positioned within the capillary chamber and comprising a main working electrode body portion and a working electrode neck extending from the main working electrode body portion, the main working electrode body portion having a generally linear configuration having an average width and the working electrode neck having a working electrode neck width that is reduced relative to the average width of the main working electrode body portion, the working electrode neck constituting the sole portion of the working electrode that extends across the inner boundary and out of the capillary chamber wherein the effective working electrode portion defines an effective working electrode area exposed to the capillary chamber including the entire area of the main working electrode body portion and an area of the working electrode neck contained within the capillary chamber; and
a counter electrode including an effective counter electrode portion positioned within the capillary chamber and comprising a main counter electrode body portion and a counter electrode neck extending from the main counter electrode body portion, the counter electrode neck having a counter electrode neck width, the counter electrode neck constituting the sole portion of the counter electrode that extends across the inner boundary and out of the capillary chamber wherein the effective counter electrode portion defines an effective counter electrode area exposed to the capillary chamber including the entire area of the main counter electrode body portion and an area of the counter electrode neck contained within the capillary chamber,wherein the working electrode neck width is less than the counter electrode neck width, wherein the effective working electrode area is different than the effective counter electrode area,wherein the working electrode neck extends across a single inner side wall of the inner boundary of the capillary chamber and the counter electrode neck extends across the same single inner side wall of the inner boundary of the capillary chamber, andwherein a ratio between the effective working electrode area and the effective counter electrode area is independent of the relative position of the inner side wall along the reduced working electrode neck width.
2 Assignments
0 Petitions
Accused Products
Abstract
A biosensor including a capillary chamber having an inner boundary, a working electrode including an effective working electrode portion positioned within the capillary chamber, and a counter electrode including an effective counter electrode portion positioned within the capillary chamber, and with the working and counter electrodes each having a neck that constitutes the sole portion of the electrodes that extends across the inner boundary and out of the capillary chamber. In one embodiment, the effective working electrode portion defines an average working electrode width, and the working electrode neck defines a working electrode neck width that is reduced relative to the average working electrode width. In another embodiment, a ratio between the area of the effective working electrode portion exposed to the capillary chamber and the area of the effective counter electrode portion exposed to the capillary chamber is substantially constant as a position of the inner boundary of the capillary chamber is varied along a length of the working and counter electrode necks.
-
Citations
25 Claims
-
1. A biosensor, comprising:
-
a capillary chamber having an inner boundary; a working electrode including an effective working electrode portion positioned within the capillary chamber and comprising a main working electrode body portion and a working electrode neck extending from the main working electrode body portion, the main working electrode body portion having a generally linear configuration having an average width and the working electrode neck having a working electrode neck width that is reduced relative to the average width of the main working electrode body portion, the working electrode neck constituting the sole portion of the working electrode that extends across the inner boundary and out of the capillary chamber wherein the effective working electrode portion defines an effective working electrode area exposed to the capillary chamber including the entire area of the main working electrode body portion and an area of the working electrode neck contained within the capillary chamber; and a counter electrode including an effective counter electrode portion positioned within the capillary chamber and comprising a main counter electrode body portion and a counter electrode neck extending from the main counter electrode body portion, the counter electrode neck having a counter electrode neck width, the counter electrode neck constituting the sole portion of the counter electrode that extends across the inner boundary and out of the capillary chamber wherein the effective counter electrode portion defines an effective counter electrode area exposed to the capillary chamber including the entire area of the main counter electrode body portion and an area of the counter electrode neck contained within the capillary chamber, wherein the working electrode neck width is less than the counter electrode neck width, wherein the effective working electrode area is different than the effective counter electrode area, wherein the working electrode neck extends across a single inner side wall of the inner boundary of the capillary chamber and the counter electrode neck extends across the same single inner side wall of the inner boundary of the capillary chamber, and wherein a ratio between the effective working electrode area and the effective counter electrode area is independent of the relative position of the inner side wall along the reduced working electrode neck width. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
-
-
15. A biosensor, comprising:
-
a capillary chamber having an inner boundary; a working electrode including an effective working electrode portion positioned within the capillary chamber and comprising a main working electrode body portion with a working electrode neck extending therefrom, the working electrode neck having a reduced width relative to the main working electrode body portion and constituting the sole portion of the working electrode that extends across the inner boundary and out of the capillary chamber; and a counter electrode including an effective counter electrode portion positioned within the capillary chamber and comprising a main counter electrode body portion with a counter electrode neck extending therefrom, the main counter electrode body portion positioned generally adjacent the main working electrode body portion, the counter electrode neck constituting the sole portion of the counter electrode that extends across the inner boundary and out of the capillary chamber, wherein the effective working electrode portion defines an effective working electrode area exposed to the capillary chamber including the entire area of the main working electrode body portion and an area of the working electrode neck contained within the capillary chamber, wherein the effective counter electrode portion defines an effective counter electrode area exposed to the capillary chamber including the entire area of the main counter electrode body portion and an area of the counter electrode neck contained within the capillary chamber, wherein the effective working electrode area is different than the effective counter electrode area, wherein the reduced width of the working electrode neck is less than a width of the counter electrode neck width, wherein the working electrode neck extends across a single inner side wall of the inner boundary of the capillary chamber and the counter electrode neck extends across the same single inner side wall of the inner boundary of the capillary chamber, and wherein a ratio between the effective working electrode area and the effective counter electrode area is independent of the relative position of the inner side wall along the reduced width of the working electrode neck. - View Dependent Claims (16, 17, 18, 19, 20, 21)
-
-
22. A biosensor, comprising:
-
a capillary chamber having an inner boundary; a working electrode including an effective working electrode portion positioned within the capillary chamber and comprising a main working electrode body portion and a working electrode neck extending from the main working electrode body portion wherein the effective working electrode portion defines an effective working electrode area exposed to the capillary chamber including the entire area of the main working electrode body portion and an area of the working electrode neck contained within the capillary chamber, the working electrode neck having a reduced width relative to the main working electrode body portion and being the sole portion of the working electrode that extends out of the capillary chamber; and a counter electrode including an effective counter electrode portion positioned within the capillary chamber and comprising a main counter electrode body portion and a counter electrode neck extending from the main counter electrode body portion wherein the effective counter electrode portion defines an effective counter electrode area exposed to the capillary chamber including the entire area of the main counter electrode body portion and an area of the counter electrode neck contained within the capillary chamber, the counter electrode neck being the sole portion of the counter electrode that extends out of the capillary chamber, and wherein the working electrode neck extends across a single inner side wall of the inner boundary of the capillary chamber and the counter electrode neck extends across the same single inner side wall of the inner boundary of the capillary chamber, wherein the effective working electrode area is different than the effective counter electrode area, wherein the reduced width of the working electrode neck is less than a width of the counter electrode neck, and wherein a ratio between the effective working electrode area and the effective counter electrode area is independent of the relative position of the inner side wall along the reduced width of the working electrode neck. - View Dependent Claims (23, 24, 25)
-
Specification