Optical sensor device

Patent metadata

Field	Value
Publication number	US-10794760-B2
Application number	US-201815895477-A
Country	US
Kind code	B2
Filing date	Feb 13, 2018
Priority date	Feb 15, 2017
Publication date	Oct 6, 2020
Grant date	Oct 6, 2020

Abstract

This optical sensor device includes a first light receiving portion having sensitivity to ultraviolet light, a first sealing portion covering the first light receiving portion, a second light receiving portion having sensitivity to ultraviolet light, and a second sealing portion which covers the second light receiving portion. At least one of the first sealing portion and the second sealing portion is configured to transmit at least part of a ultraviolet light wavelength band, the first sealing portion is formed from one or more resin layers and has transmission spectral characteristics that a first wavelength is set as a lower limit value of a transmission wavelength band, and the second sealing portion is formed from one or more resin layers and has transmission spectral characteristics that a second wavelength different from the first wavelength is set as a lower limit value of the transmission wavelength band.

First claim

What is claimed is:

1. An optical sensor device comprising:
a first light receiving portion having sensitivity to ultraviolet light;
a first sealing portion covering the first light receiving portion;
a second light receiving portion having sensitivity to ultraviolet light; and
a second sealing portion covering the second light receiving portion,
at least one of the first sealing portion and the second sealing portion being configured to transmit at least part of an ultraviolet light wavelength band,
the first sealing portion being formed from one resin layer or more than one resin layers, and the first sealing portion having a transmission spectral characteristic in which a first wavelength is set as a lower limit value of a transmission wavelength band, and
the second sealing portion being formed from one resin layer or more than one resin layers, and the second sealing portion having a transmission spectral characteristic in which a second wavelength different from the first wavelength is set as a lower limit value of a transmission wavelength band.

2. The optical sensor device according to claim 1 , wherein both the first sealing portion and the second sealing portion are integratedly included in a resin sealing portion, and the resin sealing portion is formed from a plurality of transparent resins adjacent to each other.

3. The optical sensor device according to claim 1 , wherein the first sealing portion and the second sealing portion are formed using two types of resins selected from:
a first transparent resin which shows permeability from 250 nm and has a transmission spectral characteristic in which a transmittance in a wavelength band longer than 300 nm is equal to or more than 90%,
a second transparent resin which shows permeability from 315 nm and has a transmission spectral characteristic in which a transmittance in a wavelength band longer than 350 nm is equal to or more than 90%, and
a third transparent resin which shows permeability from 380 nm and has a transmission spectral characteristic in which a transmittance in a wavelength band longer than 400 nm is equal to or more than 90%.

4. The optical sensor device according to claim 2 , wherein the first sealing portion and the second sealing portion are formed using two types of resins selected from:
a first transparent resin which shows permeability from 250 nm and has a transmission spectral characteristic in which a transmittance in a wavelength band longer than 300 nm is equal to or more than 90%,
a second transparent resin which shows permeability from 315 nm and has a transmission spectral characteristic in which a transmittance in a wavelength band longer than 350 nm is equal to or more than 90%, and
a third transparent resin which shows permeability from 380 nm and has a transmission spectral characteristic in which a transmittance in a wavelength band longer than 400 nm is equal to or more than 90%.

5. The optical sensor device according to claim 1 , wherein the first sealing portion and the second sealing portion are formed using two types of resins selected from:
a first epoxy resin which shows permeability from 250 nm, the first epoxy resin having a transmission spectral characteristic in which a transmittance in a wavelength band longer than 300 nm is equal to or more than 90%, and the first epoxy resin being made from triglycidyl isocyanurate;
a second epoxy resin which shows permeability from 315 nm, the second epoxy resin having a transmission spectral characteristic in which a transmittance in a wavelength band longer than 350 nm is equal to or more than 90%, and the second epoxy resin being made from a mixture of triglycidyl isocyanurate and bisphenol A diglycidyl ether with the triglycidyl isocyanurate as a main component, and
a third epoxy resin which shows permeability from 380 nm, the third epoxy resin having a transmission spectral characteristic in which a transmittance in a wavelength band longer than 400 nm is equal to or more than 90%, and the third epoxy resin being formed from a mixture of bisphenol A diglycidyl ether and triglycidyl isocyanurate with the bisphenol A diglycidyl ether as a main component.

6. The optical sensor device according to claim 2 , wherein the first sealing portion and the second sealing portion are formed using two types of resins selected from:
a first epoxy resin which shows permeability from 250 nm, the first epoxy resin having a transmission spectral characteristic in which a transmittance in a wavelength band longer than 300 nm is equal to or more than 90%, and the first epoxy resin being made from triglycidyl isocyanurate;
a second epoxy resin which shows permeability from 315 nm, the second epoxy resin having a transmission spectral characteristic in which a transmittance in a wavelength band longer than 350 nm is equal to or more than 90%, and the second epoxy resin being made from a mixture of triglycidyl isocyanurate and bisphenol A diglycidyl ether with the triglycidyl isocyanurate as a main component, and
a third epoxy resin which shows permeability from 380 nm, the third epoxy resin having a transmission spectral characteristic in which a transmittance in a wavelength band longer than 400 nm is equal to or more than 90%, and the third epoxy resin being formed from a mixture of bisphenol A diglycidyl ether and triglycidyl isocyanurate with the bisphenol A diglycidyl ether as a main component.

7. The optical sensor device according to claim 1 , wherein the first sealing portion and the second sealing portion are formed using two types of resins selected from:
a first transparent resin which shows permeability from 250 nm, the first transparent resin having a transmission spectral characteristic with a rising portion having a transmittance equal to or more than 80% at 280 nm and a transmittance equal to or more than 90% at 300 nm, and with a transmittance equal to or more than 95% on a wavelength side longer than the rising portion,
a second transparent resin which shows permeability from 315 nm, the second transparent resin having a transmission spectral characteristic with a rising portion having a transmittance equal to or more than 80% at 320 nm and a transmittance equal to or more than 90% at 350 nm, and with a transmittance equal to or more than 95% on a wavelength side longer than the rising portion, and
a third transparent resin which shows permeability from 380 nm, the third transparent resin having a transmission spectral characteristic with a rising portion having a transmittance equal to or more than 80% at 390 nm and a transmittance equal to or more than 90% at 400 nm, and with a transmittance equal to or more than 95% on a wavelength side longer than the rising portion.

8. The optical sensor device according to claim 2 , wherein the first sealing portion and the second sealing portion are formed using two types of resins selected from:
a first transparent resin which shows permeability from 250 nm, the first transparent resin having a transmission spectral characteristic with a rising portion having a transmittance equal to or more than 80% at 280 nm and a transmittance equal to or more than 90% at 300 nm, and with a transmittance equal to or more than 95% on a wavelength side longer than the rising portion,
a second transparent resin which shows permeability from 315 nm, the second transparent resin having a transmission spectral characteristic with a rising portion having a transmittance equal to or more than 80% at 320 nm and a transmittance equal to or more than 90% at 350 nm, and with a transmittance equal to or more than 95% on a wavelength side longer than the rising portion, and
a third transparent resin which shows permeability from 380 nm, the third transparent resin having a transmiss

Assignees

• Ablic Inc
• Tohoku Techno Arch Co Ltd

Inventors

• Tsukagoshi Koji
• Sugawa Shigetoshi
• Kuroda Rihito

Classifications

• H10F77/331

  for filtering or shielding light, e.g. multicolour filters for photodetectors · CPC title

• G01J1/0403

  Mechanical elements; Supports for optical elements; Scanning arrangements · CPC title

• H05K2201/10151

  Sensor · CPC title

• H05K1/0306

  Inorganic insulating substrates, e.g. ceramic, glass · CPC title

• G01J1/0209

  Monolithic · CPC title