Method for manufacturing optical device, optical device, and biological information detector

Abstract

A biological information detector includes a substrate, a light-emitting element, a light-receiving element, and a bonding pad. The light-emitting element has a thickness of 20 μm to 1000 μm. The light-receiving element has a thickness of 20 μm to 1000 μm. The bonding pad is disposed at a position that overlaps the light-emitting element and that is displaced relative to a center of the light-emitting element in a plan view as viewed in a perpendicular direction perpendicular to an emitting surface of the light-emitting element. A wavelength of light emitted by the light-emitting element is within a range of 470 nm to 600 nm.

1 . A biological information detector comprising:
 a substrate;   a light-emitting element having a thickness of 20 μm to 1000 μm;   a light-receiving element having a thickness of 20 μm to 1000 μm; and   a bonding pad disposed at a position that overlaps the light-emitting element and that is displaced relative to a center of the light-emitting element in a plan view as viewed in a perpendicular direction perpendicular to an emitting surface of the light-emitting element,   a wavelength of light emitted by the light-emitting element being within a range of 470 nm to 600 nm.   
     
     
         2 . The biological information detector according to  claim 1 , further comprising
 a reflecting part disposed in periphery of the light-emitting element.   
     
     
         3 . The biological information detector according to  claim 1 , wherein
 the light-emitting element has a quadrilateral shape in the plan view, and a length of one side of the light-emitting element is 100 μm to 10,000 μm.   
     
     
         4 . The biological information detector according to  claim 1 , further comprising
 a light-transmitting film disposed on the substrate.   
     
     
         5 . The biological information detector according to  claim 4 , wherein
 the maximum transmittance rate of light passing through the light-transmitting film falls within a range of ±10% of the maximum intensity value of the wavelength of the light emitted by the light-emitting element.   
     
     
         6 . The biological information detector according to  claim 4 , wherein
 the light-transmitting film increases smoothness of a surface of the substrate.   
     
     
         7 . The biological information detector according to  claim 2 , wherein
 the reflecting part includes metal or resin.   
     
     
         8 . The biological information detector according to  claim 1 , further comprising:
 a support part supporting the light-emitting element, the support part having a thickness of 50 μm to 1000 μm.   
     
     
         9 . A biological information measuring device comprising:
 the biological information detector according to  claim 1 .