Filter and method of the same

Patent metadata

Field	Value
Publication number	US-9005342-B2
Application number	US-201213728737-A
Country	US
Kind code	B2
Filing date	Dec 27, 2012
Priority date	Dec 28, 2011
Publication date	Apr 14, 2015
Grant date	Apr 14, 2015

Abstract

The present invention is characterized in that a filter made of resin comprises a through-hole film portion ( 14 ); and a structure reinforce portion ( 13 ), wherein a through-hole ( 15 ) is provided in a through-hole film portion ( 14 ), the thickness of the through-hole film portion ( 14 ) is from 0.5 to 2.0 μm, the bore of the through-hole ( 15 ) is from 0.05 to 0.5 μm, the thickness of the structure reinforce portion ( 13 ) is bigger than the thickness of the through-hole film portion ( 14 ), the structure reinforce portion ( 13 ) encloses the through-hole film portion ( 14 ), a damage-reduction structure is provided on the upper surface of the structure reinforce portion ( 13 ), and wherein, the damage-reduction structure may be an uneven structures.

First claim

The invention claimed is:

1. A filter made of resin comprising:
a through-hole film portion; and
a structure reinforce portion, wherein
a through-hole is provided in the through-hole film portion,
the thickness of the through-hole film portion is from 0.5 to 2.0 μm,
the bore of the through-hole is from 0.05 to 0.5 μm,
the thickness of the structure reinforce portion is bigger than the thickness of the through-hole film portion,
the structure reinforce portion encloses the through-hole film portion, and
a damage-reduction structure is provided on an upper surface of the structure reinforce portion, wherein
the damage-reduction structure is at least one of
an uneven structure,
a low surface energy layer with a surface energy that is smaller than a surface energy of the structure reinforce portion, and
a low elastic modulus layer with an elastic modulus that is smaller than an elastic modulus of the structure reinforce portion, and wherein
the uneven structure is a convex curved surface or a concave curved surface.

2. The filter according to claim 1 , wherein
a plurality of the through-holes is disposed along the normal direction to a through-hole film portion surface.

3. The filter according to claim 1 , wherein
the surface energy of the low surface energy layer is 30 or less mJ/m 2 .

4. The filter according to claim 1 , wherein
the elastic modulus of the low elastic modulus layer is 500 or less MPa.

5. The filter according to claim 3 , wherein
a low elastic modulus layer is provided on the surface of the through-hole film portion.

6. The filter according to claim 1 , wherein
the filter comprises a protrusion,
the protrusion is provided on the edge of the through-hole in the through-hole film portion, and wherein
a height of the protrusion is from 2 to 20 nm.

7. The filter according to claim 1 , wherein
the through-hole film portion and the structure reinforce portion are made of the same resin.

8. The filter according to claim 7 , wherein
the through-hole film portion and the structure reinforce portion are cast.

9. A filter made of resin comprising:
a through-hole film portion; and
a structure reinforce portion, wherein
a through-hole is provided in the through-hole film portion,
the thickness of the through-hole film portion is from 0.5 to 2.0 μm,
the bore of the through-hole is from 0.05 to 0.5 μm,
the thickness of the structure reinforce portion is bigger than the thickness of the through-hole film portion,
the structure reinforce portion encloses the through-hole film portion, and
a damage-reduction structure is provided on an upper surface of the structure reinforce portion, wherein
the damage-reduction structure is at least one of
an uneven structure,
a low surface energy layer with a surface energy that is smaller than a surface energy of the structure reinforce portion, and
a low elastic modulus layer with an elastic modulus that is smaller than an elastic modulus of the structure reinforce portion, and wherein
the surface energy of the low surface energy layer is 30 or less mJ/m 2 , and
a low elastic modulus layer is provided on the surface of the through-hole film portion.

10. The filter according to claim 9 , wherein
a plurality of the through-holes is disposed along the normal direction to a through-hole film portion surface.

11. The filter according to claim 9 , wherein
the elastic modulus of the low elastic modulus layer is 500 or less MPa.

12. The filter according to claim 9 , wherein
the filter comprises a protrusion,
the protrusion is provided on the edge of the through-hole in the through-hole film portion, and wherein
a height of the protrusion is from 2 to 20 nm.

13. The filter according to claim 9 , wherein
the through-hole film portion and the structure reinforce portion are made of the same resin.

14. The filter according to claim 13 , wherein
the through-hole film portion and the structure reinforce portion are cast.

15. A filter made of resin comprising:
a through-hole film portion; and
a structure reinforce portion, wherein
a through-hole is provided in the through-hole film portion,
the thickness of the through-hole film portion is from 0.5 to 2.0 μm,
the bore of the through-hole is from 0.05 to 0.5 μm,
the thickness of the structure reinforce portion is bigger than the thickness of the through-hole film portion,
the structure reinforce portion encloses the through-hole film portion, and
a damage-reduction structure is provided on an upper surface of the structure reinforce portion, wherein
the damage-reduction structure is at least one of
an uneven structure,
a low surface energy layer with a surface energy that is smaller than a surface energy of the structure reinforce portion, and
a low elastic modulus layer with an elastic modulus that is smaller than an elastic modulus of the structure reinforce portion, wherein
the filter comprises a protrusion,
the protrusion is provided on the edge of the through-hole in the through-hole film portion, and wherein
a height of the protrusion is from 2 to 20 nm.

16. The filter according to claim 15 , wherein
a plurality of the through-holes is disposed along the normal direction to a through-hole film portion surface.

17. The filter according to claim 15 , wherein
the elastic modulus of the low elastic modulus layer is 500 or less MPa.

18. The filter according to claim 15 , wherein
the through-hole film portion and the structure reinforce portion are made of the same resin.

19. The filter according to claim 18 , wherein
the through-hole film portion and the structure reinforce portion are cast.

Assignees

• Hitachi Ltd

Inventors

• Shimazaki Yuzuru
• Washiya Ryuta
• Ogino Masahiko
• Miyauchi Akihiro

Classifications

• B01D2325/028

  Microfluidic pore structures · CPC title

• B01D39/14 Primary

  Other self-supporting filtering material {; Other filtering material (non-woven fabrics in general D04H3/00)} · CPC title

• B01D67/0023

  by inducing porosity into non porous precursor membranes · CPC title

• B01D46/0002 Primary

  Casings; Housings; Frame constructions · CPC title

• B01D63/081

  Manufacturing thereof · CPC title