# US 2014/0151586 A1 · Biosensor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0151586 A1 - Document ID: US20140151586A1 - Status: Published application - Kind: A1 - Application number: 14/172,213 - Filed: 2014-02-04 - Published: 2014-06-05 - Earliest claimed: 2011-08-19 - Assignees: Murata Manufacturing Co., Ltd. - Applicants: Murata Manufacturing Co., Ltd. - Inventors: Toru Shimuta - Web page: https://patentgrep.com/patent/US20140151586A1 ## CPC - A61B 5/0059: {using light, e.g. diagnosis by transillumination, diascopy, fluorescence (photoacoustic A61B5/0093; optical measurement of heart rate A61B5/02416; optical measurement of blood flow A61B5/0261; optical measurement of analytes A61B5/1455)} - A61B 5/0205: Simultaneously evaluating both cardiovascular conditions and different types of body conditions, e.g. heart and respiratory condition - A61B 5/0245: by using sensing means generating electric signals, {i.e. ECG signals} - A61B 5/1455: using optical sensors, e.g. spectral photometrical oximeters - A61B 5/14551: {for measuring blood gases} - A61B 5/251: Means for maintaining electrode contact with the body - A61B 5/28: for electrocardiography [ECG] - A61B 5/296: for electromyography [EMG] - A61B 5/6826: {Finger} - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract A biosensor includes light emitting elements and a light receiving element disposed on a principal surface of a wiring board; a light shielding portion disposed between a light-emitting-element sealing portion and a light-receiving-element sealing portion; a base medium having light transmitting properties, disposed in parallel with the wiring board with the light shielding portion therebetween; an adhesion layer having light transmitting properties, configured to bond the base medium with the light-emitting-element sealing portion, the light-receiving-element sealing portion, and the light shielding portion; and a first electrocardiograph electrode attached to a principal surface of the base medium. The refractive index of the base medium is set to be higher than that of the adhesion layer, and a surface of the first electrocardiograph electrode which is adjacent to the base medium is roughened so that stray light passing through the base medium will be scattered. ## Claims ### Claim 1 A biosensor comprising: a wiring board; a light emitting element and a light receiving element disposed on a principal surface of the wiring board; a light-emitting-element sealer disposed on the principal surface of the wiring board and adjacent to the light emitting element to seal the light emitting element; a light-receiving-element sealer disposed on the principal surface of the wiring board and adjacent to the light receiving element to seal the light receiving element; a light shielding portion disposed between the light-emitting-element sealer and the light-receiving-element sealer; a base medium with light transmitting properties disposed in parallel with the wiring board with the light shielding portion therebetween; and an adhesion layer with light transmitting properties disposed between the base medium and at least one of the light shielding portion, the light-emitting-element sealer, and the light-receiving-element sealer, the adhesion layer provided to bond the base medium with the at least one of the light shielding portion, the light-emitting-element sealer, and the light-receiving-element sealer. ### Claim 2 (depends on 1) The biosensor according to claim 1, further comprising a plane electrode disposed on a principal surface of the base medium such that the plane electrode does not overlap the light emitting element and the light receiving element when viewed from a direction normal to the principal surface of the wiring board, wherein the plane electrode is configured to monitor a potential of a body. ### Claim 3 (depends on 1) The biosensor according to claim 1, wherein a refractive index of the base medium is higher than a refractive index of the adhesion layer, and the plane electrode comprises a roughened surface to scatter light passing through the base medium. ### Claim 4 (depends on 1) The biosensor according to claim 1, wherein a refractive index of the adhesion layer is higher than a refractive index of the base medium, and the light shielding portion comprises a roughened surface to scatter light passing through the adhesion layer. ### Claim 5 (depends on 1) The biosensor according to claim 1, wherein the adhesion layer is at least partially divided with a first portion adjacent to the light emitting element and a second portion adjacent to the light receiving element. ### Claim 6 (depends on 5) The biosensor according to claim 5, wherein the adhesion layer is divided such that a minor angle between a direction in which the adhesion layer is divided and a direction parallel to the wiring board is less than or equal to 50°. ### Claim 7 (depends on 5) The biosensor according to claim 5, wherein the adhesion layer is fully divided into the first portion adjacent to the light emitting element and the second portion adjacent to the light receiving element. ### Claim 8 (depends on 1) The biosensor according to claim 1, wherein the light transmitting properties of the adhesion layer have a lower light transmittance than the light transmitting properties of the base medium. ### Claim 9 (depends on 8) The biosensor according to claim 8, wherein the adhesion layer comprises a double-sided tape that includes a strip-like core member made of paper or nonwoven fabric and adhesive layers formed on both sides of the core member. ### Claim 10 (depends on 1) The biosensor according to claim 1, wherein the light emitting element comprises a pair of light emitting devices configured to emit light beams at different wavelengths. ### Claim 11 (depends on 1) The biosensor according to claim 1, wherein the light-emitting-element sealer and the light-receiving-element sealer each comprise a circular truncated cone shape that surrounds the light emitting element and the light receiving element, respectively. ### Claim 12 A biosensor comprising: a wiring board; a light emitting element and a light receiving element disposed on a principal surface of the wiring board; a light-emitting-element sealer disposed on the principal surface of the wiring board and adjacent to the light emitting element to seal the light emitting element; a light-receiving-element sealer disposed on the principal surface of the wiring board and adjacent to the light emitting element to seal the light receiving element; a light shielding portion disposed between the light-emitting-element sealer and the light-receiving-element sealer; and a cover with light transmitting properties disposed in parallel with the wiring board with the light emitting element, light receiving element and the light shielding portion therebetween. ### Claim 13 (depends on 12) The biosensor according to claim 12, wherein the cover comprises at least one roughened surface to scatter light passing through the cover. ### Claim 13 (depends on 12) The biosensor according to claim 12, wherein the cover is at least partially divided into a first portion adjacent to the light emitting element and a second portion adjacent to the light receiving element. ### Claim 14 (depends on 13) The biosensor according to claim 13, wherein the cover is divided such that a minor angle between a direction in which the cover is divided and a direction parallel to the wiring board is less than or equal to 50°. ### Claim 15 (depends on 13) The biosensor according to claim 13, wherein the cover is fully divided into the first portion adjacent to the light emitting element and the second portion adjacent to the light receiving element. ### Claim 16 (depends on 12) The biosensor according to claim 12, wherein the cover comprises at least one surface having a plurality of grooves. ### Claim 17 (depends on 16) The biosensor according to claim 16, wherein the plurality of grooves extend in a direction orthogonal to the wiring board. ### Claim 18 (depends on 17) The biosensor according to claim 17, wherein an aspect ratio of a region between the grooves is greater than or equal to 1. ### Claim 19 (depends on 12) The biosensor according to claim 12, wherein the light emitting element comprises a pair of light emitting devices configured to emit light beams at different wavelengths. ### Claim 20 (depends on 12) The biosensor according to claim 12, wherein the light-emitting-element sealer and the light-receiving-element sealer each comprise a circular truncated cone shape that surrounds the light emitting element and the light receiving element, respectively.