# US 2014/0151225 A1 · Electrochemical detector and method for producing same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0151225 A1 - Document ID: US20140151225A1 - Status: Published application - Kind: A1 - Application number: 14/131,522 - Filed: 2012-12-12 - Published: 2014-06-05 - Earliest claimed: 2012-05-17 - Assignees: Panasonic Corporation - Applicants: Panasonic Corporation - Inventors: Yoshihisa Yamashita; Seiichi Nakatani; Tetsuyoshi Ogura; Koichi Hirano; Makoto Takahashi; Satoshi Arimoto - Web page: https://patentgrep.com/patent/US20140151225A1 ## CPC - G01N 27/30: Electrodes, e.g. test electrodes; Half-cells (G01N27/414 takes precedence) - G01N 27/3277: {being a redox reaction, e.g. detection by cyclic voltammetry (voltammetry per se G01N27/42, G01N27/48)} - H01R 43/16: for manufacturing contact members, e.g. by punching and by bending - Y10T 29/49204: Contact or terminal manufacturing - G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q) - H01R: ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract An electrochemical detector is an electrochemical detector for detecting a substance in a liquid by generating a redox cycle, the electrochemical detector comprising: a first working electrode having a first electrode surface, a second working electrode having a second electrode surface, and a plurality of insulating spacer particles, wherein the first and second electrode surfaces are placed so as to face each other so that an electric field is formed between the first and second electrode surfaces, and the plurality of spacer particles are placed along the first and second electrode surfaces so as to separate the first and second electrode surfaces from each other. ## Claims ### Claim at position 1 1-20. (canceled) ### Claim 21 An electrochemical detector for detecting a substance in a liquid by generating a redox cycle, the electrochemical detector comprising: a first working electrode having a first electrode surface; a second working electrode having a second electrode surface; and a plurality of insulating spacers, wherein the first and second electrode surfaces are placed so as to face each other so that an electric field is formed between the first and second electrode surfaces, the plurality of spacers are placed along the first and second electrode surfaces so as to separate the first and second electrode surfaces from each other, each of the spacers is particulate, the electrochemical detector comprises a plurality of detection units which are placed along a direction parallel to the electric field, and each of the detection units comprises the first working electrode, the second working electrode, and the plurality of spacers. ### Claim 22 (depends on 21) The electrochemical detector according to claim 21, wherein each of the spacers is formed of at least one shape selected from spherical and cylindrical. ### Claim 23 (depends on 21) The electrochemical detector according to claim 21, wherein a separation distance between the first and second working electrode surfaces is 20 nm or more and 3 μm or less. ### Claim 24 (depends on 21) The electrochemical detector according to claim 21, wherein a surface density of the spacers on the first or second electrode surface is 0.01/mm2 or more and 1/mm2 or less. ### Claim 25 (depends on 21) The electrochemical detector according to claim 21, comprising at least one of a reference electrode and a counter electrode. ### Claim 26 (depends on 21) The electrochemical detector according to claim 21, wherein each of the first and second working electrodes contains at least one kind of metal selected from gold and platinum. ### Claim 27 (depends on 21) The electrochemical detector according to claim 21, wherein each of the first and second working electrodes is formed of a paste composition containing conductive carbon powder. ### Claim 28 (depends on 21) The electrochemical detector according to claim 21, comprising a first insulating substrate, wherein the first working electrode is formed on one main surface of the first insulating substrate. ### Claim 29 (depends on 28) The electrochemical detector according to claim 28, comprising: a third electrode formed on the one main surface of the first insulating substrate; and a connection member for electrically connecting the second working electrode and the third electrode. ### Claim 30 (depends on 28) The electrochemical detector according to claim 28, wherein the reference electrode and/or the counter electrode are formed on the one main surface of the first insulating substrate. ### Claim 31 (depends on 28) The electrochemical detector according to any one of claim 28, comprising a second insulating substrate, wherein the second working electrode is formed on one main surface of the second insulating substrate. ### Claim 32 (depends on 21) The electrochemical detector according to claim 21, comprising: an insulating intermediate substrate placed between the adjacent two detection units; and an insulating end substrate being placed on an open side of the detection unit, wherein the first or second working electrode is formed on each of both main surfaces of the insulating intermediate substrate, and the first or second working electrode is formed on one main surface of the insulating end substrate. ### Claim 33 A method for producing an electrochemical detector, comprising: a step of placing a plurality of spacers on a first working electrode having a first electrode surface; and a step of placing a second working electrode having a second electrode surface so as to face the first electrode surface so that an electric field is formed between the first and second electrode surfaces, wherein each of the spacers is particulate, the step of placing the plurality of spacers and the step of placing the second working electrode are performed a plurality of times so that a plurality of detection units are placed along a direction parallel to the electric field, and each of the detection units has the first working electrode, the second working electrode, and the plurality of spacers. ### Claim 34 (depends on 33) The method for producing an electrochemical detector according to claim 33, further comprising: a step of forming the first working electrode on one main surface of the first insulating substrate; and a step of forming the second working electrode on one main surface of the second insulating substrate. ### Claim 35 (depends on 34) The method for producing an electrochemical detector according to claim 34, comprising: a step of forming a third electrode on the one main surface of the first insulating substrate; and a step of electrically connecting the second working electrode and the third electrode via a connection member. ### Claim 36 (depends on 34) The method for producing an electrochemical detector according to claim 34, comprising: a step of forming at least one of a reference electrode and a counter electrode on the one main surface of the first insulating substrate. ### Claim 37 (depends on 33) The method for producing an electrochemical detector according to claim 33, further comprising: a step of forming the first or second working electrode on each of both main surfaces of an insulating intermediate substrate and placing the intermediate substrate between the adjacent two detection units; and a step of forming the first or second working electrode on one main surface of an insulating end substrate and placing the end substrate on an open side of the detection unit.