BIOSENSOR

• US 20160195490A1
• Filed: 11/22/2013
• Published: 07/07/2016
• Est. Priority Date: 03/28/2013
• Status: Active Grant

• Current Assignee: Leadway (Hk) Limited (Akatsuki Corp.)
• Original Assignee: Leadway (Hk) Limited (Akatsuki Corp.)
• Inventors: ZHANG, Ziyi, GE, Huanxi
• Granted Patent: US 10,209,214 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G01N 27/3272 Test elements therefor, i.e. disposable laminated substrates with electrodes, reagent and channels optical biosensors G01N33/52
• CPC Class Codes: G01N 33/5438 Electrodes

Abstract

A biosensor comprising an insulative substrate (1) and an electrode system arranged on the insulative substrate (1). The electrode system comprises thereon a reagent capable of reacting with a test sample. The electrode system comprises functional electrodes (2, 3, and 4) used for testing and assisted diffusion electrodes (12) used for controlling the diffusion of the reagent. The functional electrodes (2, 3, and 4) are arranged between the assisted diffusion electrodes (12). Because the assisted diffusion electrode (12) are capable of overcoming the effect of surface tension of the insulative base board, the reagent is allowed to diffuse smoothly and uniformly on the electrode system and to arrive at a predetermined position.

Claims

1. A biosensor, comprising an insulative substrate and an electrode system on the insulative substrate, the electrode system comprising a reaction reagent that can react with samples to be detected thereon, featured in the electrode system comprising functional electrodes for detection and assisted diffusion electrodes for controlling the diffusion of the reaction reagent, and the functional electrodes being located between the assisted diffusion electrodes.

2. The biosensor of claim 1, featured in comprising at least two assisted diffusion electrodes.

3. The biosensor of claim 2, featured in the at least two assisted diffusion electrodes being respectively located at the outsides of the functional electrodes.

4. The biosensor of claim 1, featured in the distance between the assisted diffusion electrodes and the functional electrodes exactly rendering the front end of the reaction reagent, added to the functional electrodes, being able to touch the assisted diffusion electrodes.

5. The biosensor of claim 1, featured in the functional electrodes comprising a working electrode, a counter electrode and a reference electrode, and the functional electrodes being arranged in parallel with the assisted diffusion electrodes, and being generally parallel to each other.

6. The biosensor of claim 5, featured in comprising two assisted diffusion electrodes, located in the outer sides of the functional electrodes.

7. The biosensor of claim 1, featured in comprising an insulating layer which covers part of the electrode system, the insulating layer, where the reaction reagent locates, forming a closed region without an insulating layer thereon, the reaction reagent locating on the electrode in the closed region, the closed region, surrounded by the insulating layer, comprising a closed boundary without any sharp angle, the reaction reagent covering the closed region without extending beyond the closed boundary.

8. The biosensor of claim 7, featured in the shape of the closed boundary being either a circle, an oval, two relative ovals, or a rectangle with four circular vertex angles.

9. The biosensor of claim 8, featured in the thickness of the insulating layer being 3-30 micrometers.

10. The biosensor of claim 1, featured in the assisted electrodes being located in the regions where the reaction reagent is hard to reach or is later to reach than the other regions during the diffusion of the react reagent.