Miniaturized oxygen electrode and process of producing same
First Claim
1. A miniaturized oxygen electrode comprising:
- an insulating substrate;
a first electrode pattern on the substrate and having a first active section, a first terminal section for external connection, and a first lead wire portion electrically interconnecting the first active section and the first terminal section;
a second electrode pattern on the substrate and having a second active section, a second terminal section for external connection, and a second lead wire portion electrically interconnecting the second active section and the second terminal section;
a layer of an electrolyte-containing material which contacts and electrically interconnects said first and second active sections;
an oxygen-permeable membrane covering said electrolyte-containing material;
said first lead wire portion being elongated and being disposed to extend beneath said second active section; and
an insulating layer disposed between the first lead wire portion and the second active section.
1 Assignment
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Accused Products
Abstract
The miniaturized oxygen electrode having a small size exceeding the limit of miniaturization of the prior art electrode comprises an insulating substrate 21, 31 and, provided thereon, a pair of electrode patterns 22, 23 each comprising an active section 22A, 23A, a terminal section 22C, 23C for external connection, and a lead wire portion 22B, 23B for the connection thereof, the active sections 22A, 23A being mutually connected through an electrolyte-containing material 24, the electrolyte-containing material 24 being covered with an oxygen-permeable membrane 28, the lead wire portion 22B of at least one 22 of the electrode patterns extending below the active section 23A of at least one of other electrode patterns, 23, with an insulating layer 29 intervening between the lead wire portion 22B and the active section 23A.
13 Citations
29 Claims
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1. A miniaturized oxygen electrode comprising:
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an insulating substrate; a first electrode pattern on the substrate and having a first active section, a first terminal section for external connection, and a first lead wire portion electrically interconnecting the first active section and the first terminal section; a second electrode pattern on the substrate and having a second active section, a second terminal section for external connection, and a second lead wire portion electrically interconnecting the second active section and the second terminal section; a layer of an electrolyte-containing material which contacts and electrically interconnects said first and second active sections; an oxygen-permeable membrane covering said electrolyte-containing material; said first lead wire portion being elongated and being disposed to extend beneath said second active section; and an insulating layer disposed between the first lead wire portion and the second active section. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A miniaturized biosensor including a miniaturized oxygen electrode comprising:
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an insulating substrate; a first electrode pattern on the substrate and having a first active section, a first terminal section for external connection, and a first lead wire portion electrically interconnecting the first active section and the first terminal section; a second electrode pattern on the substrate and having a second active section, a second terminal section for external connection, and a second lead wire portion electrically interconnecting the second active section and the second terminal section; a layer of an electrolyte-containing material which contacts and electrically interconnects said first and second active sections; an oxygen-permeable membrane covering said electrolyte-containing material; said first lead wire portion being elongated and being disposed to extend beneath said second active section; an insulating layer disposed between the first lead wire portion and the second active section; and an organism-related substance including an enzyme or a microorganism immobilized on one of said active sections to present an oxygen-sensitive area. - View Dependent Claims (23, 24, 25, 26, 27, 28)
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29. A process for producing a miniaturized oxygen electrode comprising:
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forming an electrode structure including an insulating substrate, an electrode pattern having a terminal section and an active section, an insulating layer pattern, and an electrolyte-containing material pattern, said patterns being disposed on said substrate; forming a first peelable resin pattern over said terminal section; forming a first oxygen-permeable membrane over the entire structure including over the substrate and said patterns; forming a second peelable resin pattern on said first oxygen-permeable membrane, said second peelable resin pattern being positioned over an oxygen-sensitive area of the active section of said electrode pattern; forming a second oxygen-permeable membrane over the entire structure including over the second peelable resin pattern and over an area of the first oxygen-permeable membrane that is not covered by the second peelable resin pattern; peeling said first peelable resin pattern to expose the terminal portion of said electrode pattern; and peeling said second peelable resin pattern to remove a portion of said second oxygen-permeable membrane located over said oxygen-sensitive area while leaving said first oxygen-permeable membrane located over said oxygen-sensitive area intact, whereby the total thickness of oxygen-permeable membrane located over said oxygen-sensitive area is less than the thickness of oxygen-permeable membrane located over other areas of the structure, to the end that the response of the electrode is enhanced.
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Specification