Biosensor having light emitting and receiving elements to obtain a biological signal

摘要

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.

主权项

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; 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; and 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.