Biosensor
First Claim
Patent Images
1. A biosensor comprising:
- an insulating substrate having a top surface and a first side positioned opposite a second side;
a conducting film having two slits, the conducting film formed on the top surface of the insulating substrate and covering the top surface entirely except for the two slits, the slits separating the conducting film into two counter electrodes and a measuring electrode, the measuring electrode disposed in a substantially center location between the first side and the second side and between the two counter electrodes;
a first cover provided across the measuring electrode and across the two counter electrodes;
a second cover provided across the measuring electrode and across the two counter electrodes, the second cover spaced apart from the first cover forming a channel extending between the first and second sides of the insulating substrate; and
a reagent layer provided in the channel.
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Accused Products
Abstract
A biosensor is fabricated by forming a metal film over the surface of a substrate through evaporation, sputtering or by gluing a metal foil, then splitting the metal film into three regions, and forming a reagent layer on an area of measuring electrode and two counter-electrodes for placing a liquid sample on by providing a cover disposed over the splitted metal film. As neither of the electrodes are formed through conventional printing technology, the electrodes can be formed without dispersion. As a result, a precision biosensor having excellent response characteristics is implemented.
465 Citations
14 Claims
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1. A biosensor comprising:
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an insulating substrate having a top surface and a first side positioned opposite a second side; a conducting film having two slits, the conducting film formed on the top surface of the insulating substrate and covering the top surface entirely except for the two slits, the slits separating the conducting film into two counter electrodes and a measuring electrode, the measuring electrode disposed in a substantially center location between the first side and the second side and between the two counter electrodes; a first cover provided across the measuring electrode and across the two counter electrodes; a second cover provided across the measuring electrode and across the two counter electrodes, the second cover spaced apart from the first cover forming a channel extending between the first and second sides of the insulating substrate; and a reagent layer provided in the channel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 11)
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8. A method of manufacturing a biosensor comprising the steps of:
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(a) entirely covering a top surface of an insulating substrate with a metal film having a first side positioned opposite a second side; (b) providing two slits in the metal film to form a centrally located measuring electrode and two opposing counter electrodes; (c) positioning a first cover across the measuring electrode and across the two counter electrodes; (d) positioning a second cover across the measuring electrode and across the two counter electrodes, the second cover positioned apart from the first cover to form a channel extending between the first and second sides of the insulating substrate; and (e) providing a reagent layer in the channel. - View Dependent Claims (9, 10, 12, 13, 14)
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Specification