Implement and device for analysis

• US 7,351,375 B2
• Filed: 07/16/2002
• Issued: 04/01/2008
• Est. Priority Date: 07/18/2001
• Status: Active Grant

• Current Assignee: ARKRAY, Inc
• Original Assignee: ARKRAY, Inc
• Inventors: Noda, Norimasa, Katsuki, Koji, Kado, Kotaro
• Primary Examiner(s): Warden; Jill
• Assistant Examiner(s): Siefke; Samuel P
• Application Number:
  US10/483,442
• Publication Number:
  US 20040173458A1
• Time in Patent Office: 2,086 Days
• Field of Search: 422/50, 422/55, 422/58, 422/68.1, 422/82.01, 422/99
• US Class Current: 422/82.01
• CPC Class Codes: G01N 27/3272 Test elements therefor, i.e. disposable laminated substrates with electrodes, reagent and channels optical biosensors G01N33/52

Abstract

The present invention relates to an analyzing implement (1) having a capillary for movement of a specimen liquid. The capillary has inner surfaces (21c, 32c) provided with a first and a second opposed electrodes opposed to each other. The implement (1) includes, for example, a substrate (20), a cover (40) and a spacer (30) between the substrate (20) and the cover (40). In this case, the capillary is provided by the substrate (20), the cover (40) and the spacer (30). Preferably, capillary forming surfaces (31c, 32c) of the spacer (30) are electrically conductive, in which case the surfaces (31c, 32c) provide the first and the second electrodes.

Claims

1. An analyzing implement comprising a substrate, a cover covering the substrate, a spacer disposed between the substrate and the cover, and a capillary for movement of a specimen liquid,

wherein the capillary is formed by the substrate, the cover and the spacer,

wherein the capillary has an inner surface provided with first and second opposed electrodes opposed to each other,

wherein the surfaces of the spacer forming the capillary are electrically conductive and provide the first and second opposed electrodes, and

wherein the spacer includes two blocks opposed to each other, the two blocks being formed entirely of an electrically conductive material.

2. The analyzing implement according to claim 1, wherein the two blocks are formed of an electrically insulating resin containing an electrically conductive polymer or an electrically conductive filler.

3. The analyzing implement according to claim 1, wherein each of the two blocks has a rectangular cross section defined by an upper surface, a lower surface and two side surfaces,

the upper surfaces and the lower surfaces being adhesive, the cover being bonded to the substrate via the two blocks.

4. The analyzing implement according to claim 1, wherein the first and second opposed electrodes are for measurement of a dielectric constant, a resistance value or a physical quantity correlating to electrical conductivity of the specimen liquid.

5. The analyzing implement according to claim 4, further comprising first and second flat electrodes for measurement of a physical quantity correlating to concentration of a specific component of the specimen liquid.

6. The analyzing implement according to claim 5, further comprising a first lead electrically connected to the first opposed electrode and to the first flat electrode, and a second lead connected to the second opposed electrode and to the second flat electrode.

7. The analyzing implement according to claim 6, further comprising first through fourth leads formed on the substrate,

the spacer being bonded to the substrate via an insulating layer,

the first and second flat electrodes being formed on the substrate and electrically connected to the first and second leads respectively,

the first and second opposed electrodes being electrically connected to the third and fourth leads respectively, via through holes formed in the insulating layer.

8. The analyzing implement according to claim 1, wherein the first and the second opposed electrodes serve in measurement of a responding current value correlating to concentration of a specific component in the specimen liquid.

9. An analyzing implement comprising a substrate, a cover covering the substrate, a spacer disposed between the substrate and the cover, a capillary for movement of a specimen liquid, and first and second leads formed on the substrate,

the capillary being formed by the substrate, the cover and the spacer,

the capillary having an inner surface provided with first and second opposed electrodes opposed to each other

surfaces of the spacer forming the capillary being electrically conductive and providing the first and the second opposed electrodes,

the spacer being bonded to the substrate via an insulating layer.,

the first and the second opposed electrodes being electrically connected to the first and the second leads respectively, via through holes formed in the insulating layer.

10. An analyzing implement comprising a capillary for movement of a specimen liquid,

wherein the capillary has an inner surface provided with first and second opposed electrodes opposed to each other for measurement of a dielectric constant, a resistance value or a physical quantity correlating to electrical conductivity of the specimen liquid,

wherein the analyzing implement further comprises first and second flat electrodes for measurement of a physical quantity correlating to concentration of a specific component of the specimen liquid, a first lead electrically connected to the first opposed electrode and to the first flat electrode, and a second lead connected to the second opposed electrode and to the second flat electrode.