Biosensor, method of producing the same and detection system comprising the same
First Claim
Patent Images
1. A biosensor to detect a target substance contained in a liquid sample, comprising:
- an insulating base plate having a first planar side and a second planar side;
a recess formed in a portion of the insulating base plate that is thinner than a surrounding part of the recess, the recess being depressed in a thickness direction from the first planar side to the second planar side;
a convex structure formed in a bottom of the recess and having a peak protruding from the second planar side toward the first planar side;
a working electrode and a counter electrode, at least one of which is disposed along the convex structure; and
a reaction reagent disposed in the recess so as to be in contact with the at least one of the working electrode and the counter electrode, the reaction reagent reacting with a specific substance in the liquid sample;
a spacer disposed on the first planar side of the insulating base plate so that at least part of the recess is exposed;
an upper cover disposed over the spacer to cover the recess exposed from the spacer;
a liquid sample chamber formed by the insulating base plate including the recess, the spacer, and the upper cover; and
an intake port disposed above the recess and configured to draw a liquid sample by capillary action from the outside into the liquid sample chamber,wherein the liquid sample chamber includes a first space and a second space disposed on the first space so as to communicate with the first space,the first space is formed by the recess, andthe second space is formed by the intake port.
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Abstract
A biosensor detects a target substance contained in a liquid sample and includes an insulating base plate having a recess formed in a portion that is thinner than the surrounding part, a working electrode and a counter electrode, at least one of which is disposed in the recess. A reaction reagent is disposed in the recess and reacts with a specific substance in the liquid sample.
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Citations
28 Claims
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1. A biosensor to detect a target substance contained in a liquid sample, comprising:
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an insulating base plate having a first planar side and a second planar side; a recess formed in a portion of the insulating base plate that is thinner than a surrounding part of the recess, the recess being depressed in a thickness direction from the first planar side to the second planar side; a convex structure formed in a bottom of the recess and having a peak protruding from the second planar side toward the first planar side; a working electrode and a counter electrode, at least one of which is disposed along the convex structure; and a reaction reagent disposed in the recess so as to be in contact with the at least one of the working electrode and the counter electrode, the reaction reagent reacting with a specific substance in the liquid sample; a spacer disposed on the first planar side of the insulating base plate so that at least part of the recess is exposed; an upper cover disposed over the spacer to cover the recess exposed from the spacer; a liquid sample chamber formed by the insulating base plate including the recess, the spacer, and the upper cover; and an intake port disposed above the recess and configured to draw a liquid sample by capillary action from the outside into the liquid sample chamber, wherein the liquid sample chamber includes a first space and a second space disposed on the first space so as to communicate with the first space, the first space is formed by the recess, and the second space is formed by the intake port. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification