Unit for electrostatic filter and electrostatic filter

Patent metadata

Field	Value
Publication number	US-12059690-B2
Application number	US-202117152129-A
Country	US
Kind code	B2
Filing date	Jan 19, 2021
Priority date	Jan 24, 2020
Publication date	Aug 13, 2024
Grant date	Aug 13, 2024

Abstract

A unit for electrostatic filter includes: a repeated structure of patterns that are respectively formed of one selected from at least two different substances having different work functions. The patterns formed of the different substances are put in contact with each other. The work functions differ by 1 eV or greater between the different substances put in contact with each other in the patterns.

First claim

What is claimed is:

1. A unit for an electrostatic filter, comprising:
a base material;
a first pattern layer; and
a second pattern layer having a work function that is different from a work function of the first pattern layer, the first pattern layer and the second pattern layer being formed on the base material adjacent to and in contact with each other, and the first pattern layer and the second pattern layer being arranged repeatedly in an in-plane direction of the base material,
wherein a difference between the work function of the first pattern layer and the work function of the second pattern layer is 1 eV or greater,
wherein at least one of the first pattern layer or the second pattern layer comprises a resin, and
wherein the base material differs from each of the first pattern layer and the second pattern layer.

2. The unit for electrostatic filter according to claim 1 , wherein the first pattern layer and the second pattern layer are arranged repeatedly at a distance of 1.0 mm or smaller.

3. The unit for electrostatic filter according to claim 1 , wherein the first pattern layer and the second pattern layer include an organic compound.

4. The unit for electrostatic filter according to claim 1 , wherein at least one of the first pattern layer or the second pattern layer is formed of a reactive resin.

5. The unit for electrostatic filter according to claim 1 , wherein one of the first pattern layer or the second pattern layer is formed of a photosensitive material.

6. The unit for electrostatic filter according to claim 1 , wherein one of the first pattern layer or the second pattern layer is formed of a material including a fluorine-containing resin, and another of the first pattern layer or the second pattern layer is formed of a material including a urethane resin or an epoxy resin.

7. The unit for electrostatic filter according to claim 1 , wherein one of the first pattern layer or the second pattern layer forms a line-and-space pattern, and another of the first pattern layer or the second pattern layer is arranged in a space portion of the line-and-space pattern.

8. An electrostatic filter, comprising:
a unit for the electrostatic filter, the unit including:
a base material;
a first pattern layer; and
a second pattern layer having a work function that is different from a work function of the first pattern layer, the first pattern layer and the second pattern layer being formed on the base material adjacent to and in contact with each other, and the first pattern layer and the second pattern layer being arranged repeatedly in an in-plane direction of the base material,
wherein a difference between the work function of the first pattern layer and the work function of the second pattern layer is 1 eV or greater,
wherein at least one of the first pattern layer or the second pattern layer comprises a resin, and
wherein the base material differs from each of the first pattern layer and the second pattern layer.

9. The electrostatic filter according to claim 8 , wherein the first pattern layer and the second pattern layer are arranged repeatedly at a distance of 1.0 mm or smaller.

10. The electrostatic filter according to claim 8 , wherein the first pattern layer and the second pattern layer include an organic compound.

11. The electrostatic filter according to claim 8 , wherein at least one of the first pattern layer or the second pattern layer is formed of reactive resin.

12. The electrostatic filter according to claim 8 , wherein one of the first pattern layer or the second pattern layer is formed of a photosensitive material.

13. The electrostatic filter according to claim 8 , wherein one of the first pattern layer or the second pattern layer is formed of a material including a fluorine-containing resin, and another of the first pattern layer or the second pattern layer is formed of a material including a urethane resin or an epoxy resin.

14. The electrostatic filter according to claim 8 , wherein one of the first pattern layer or the second pattern layer forms a line-and-space pattern, and another of the first pattern layer or the second pattern layer is arranged in a space portion of the line-and-space pattern.

15. The unit for electrostatic filter according to claim 1 , further comprising a third pattern layer having a work function different from either of the first pattern layer or the second pattern layer, the third pattern layer being formed on the base material and in contact with at least one of the first pattern layer or the second pattern layer.

16. The electrostatic filter according to claim 8 , wherein the unit further comprises a third pattern layer having a work function different from either of the first pattern layer or the second pattern layer, the third pattern layer being formed on the base material and in contact with at least one of the first pattern layer or the second pattern layer.

17. The unit for electrostatic filter according to claim 1 , wherein the first pattern layer and the second pattern layer are arranged repeatedly at a distance of 0.05 mm or greater.

18. The electrostatic filter according to claim 8 , wherein the first pattern layer and the second pattern layer are arranged repeatedly at a distance of 0.05 mm or greater.

19. The unit for electrostatic filter according to claim 1 , wherein there is no gap between the first pattern and the second pattern.

20. The unit for electrostatic filter according to claim 1 , wherein an entire face on a second pattern side of the first pattern is in contact with the second pattern.

21. The electrostatic filter according to claim 8 , wherein there is no gap between the first pattern and the second pattern.

22. The electrostatic filter according to claim 8 , wherein an entire face on a second pattern side of the first pattern is in contact with the second pattern.

Assignees

• Canon Kk

Inventors

• Imamura Isao
• Yamauchi Sachiko

Classifications

• B03C3/64

  synthetic resins · CPC title

• B03C3/60

  Use of special materials other than liquids · CPC title

• B03C3/47

  flat, e.g. plates, discs, gratings · CPC title

• B03C3/28 Primary

  Plant or installations without electricity supply, e.g. using electrets · CPC title