Device including an α-ray source and an electronic circuit influenced by α-ray

Patent metadata

Field	Value
Publication number	US-12062675-B2
Application number	US-202016859238-A
Country	US
Kind code	B2
Filing date	Apr 27, 2020
Priority date	Nov 9, 2017
Publication date	Aug 13, 2024
Grant date	Aug 13, 2024

Abstract

A device in which the influence of α-ray is reduced, and a composition for forming an organic layer. The device includes an α-ray source, an electronic circuit influenced by α-ray, and an organic layer including an α-ray shielding agent, in which an α-ray shielding ability X of the α-ray shielding agent is 0.50 or less.

First claim

What is claimed is:

1. A device comprising:
an α-ray source;
an electronic circuit influenced by α-ray; and
an organic layer including an α-ray shielding agent,
wherein an α-ray shielding ability X of the α-ray shielding agent, which is calculated by the following method, is 0.50 or less,
the method of calculating the α-ray shielding ability X: a laminate having a glass substrate and a layer which is composed of the α-ray shielding agent and is disposed on a surface of the glass substrate, and a glass substrate on which no layer being composed of the α-ray shielding agent is disposed are prepared, an amount A1 of α-ray in the laminate on the side of the layer being composed of the α-ray shielding agent and an amount A0 of α-ray in the glass substrate on which no layer being composed of the α-ray shielding agent is disposed are calculated using an α-ray measuring device, and the α-ray shielding ability X which is a ratio of the amount A1 of α-ray to the amount A0 of α-ray is calculated, and
wherein the electronic circuit is one selected from the group consisting of a logic circuit, a storage circuit, and a communication circuit, and
the device functions as an electronic module.

2. The device according to claim 1 ,
wherein the α-ray source is a glass substrate,
the electronic circuit is a solid-state imaging element including a photoelectric conversion portion,
the organic layer is disposed between the α-ray source and the electronic circuit, and
the device functions as a solid-state imaging device.

3. The device according to claim 2 ,
wherein a film thickness of the organic layer is 20 μm or less.

4. The device according to claim 3 ,
wherein a minimum transmittance of the organic layer in a visible light region is 70% or more.

5. The device according to claim 3 ,
wherein the α-ray shielding agent is a polymer.

6. The device according to claim 2 ,
wherein a minimum transmittance of the organic layer in a visible light region is 70% or more.

7. The device according to claim 6 ,
wherein the α-ray shielding agent is a polymer.

8. The device according to claim 2 ,
wherein the α-ray shielding agent is a polymer.

9. The device according to claim 2 ,
wherein a density of the α-ray shielding agent is 1.4 g/cm 3 or more and 6.0 g/cm 3 or less.

10. The device according to claim 1 , further comprising:
at least one selected from the group consisting of a solder ball electrically connected to the electronic circuit, a solder bump electrically connected to the electronic circuit, and a mold including a filler, which covers at least a part of the electronic circuit,
wherein the α-ray source is at least one of the solder ball, the solder bump, or the filler.

11. The device according to claim 10 ,
wherein the α-ray shielding agent is a polymer.

12. The device according to claim 1 ,
wherein the α-ray shielding agent is a polymer.

13. The device according to claim 1 ,
wherein a density of the α-ray shielding agent is 1.4 g/cm 3 or more and 6.0 g/cm 3 or less.

14. The device according to claim 1 ,
wherein an ionization potential parameter of the α-ray shielding agent is 7000 KJ/mol Å or more and 25000 KJ/mol Å or less.

15. The device according to claim 1 ,
wherein a refractive index of the α-ray shielding agent at a wavelength of 589.3 nm is 1.7 or more and 3.0 or less.

16. The device according to claim 1 ,
wherein the α-ray shielding agent includes a halogen atom.

17. The device according to claim 1 ,
wherein the α-ray shielding agent is metal particles or metal oxide particles having a density of 4.0 to 6.0 g/cm 3 .

Assignees

• Fujifilm Corp

Inventors

• Miyata Tetsushi
• TAKISHITA Hirotaka
• Ohashi Hidekazu
• Sawano Mitsuru

Classifications

• H10W74/43

  comprising oxides, nitrides or carbides, e.g. ceramics or glasses · CPC title

• H10W74/47

  comprising organic materials, e.g. plastics or resins · CPC title

• H10F39/12

  Image sensors · CPC title

• H10F39/8053

  Colour filters · CPC title

• H10F39/806 Primary

  Optical elements or arrangements associated with the image sensors · CPC title