MEMS filter module with concentric filtering walls

• US 20060219627A1
• Filed: 03/31/2005
• Published: 10/05/2006
• Est. Priority Date: 03/31/2005
• Status: Abandoned Application

• Current Assignee: Becton, Dickinson & Co
• Original Assignee: Becton, Dickinson & Co
• Inventors: Rodgers, M. Steven, Smith, Norman F.
• Application Number:
  US11/095,995
• Publication Number:
  US 20060219627A1
• Time in Patent Office: Days
• US Class Current: 210/498
• CPC Class Codes: A61F 9/00781 Apparatus for modifying intraocular pressure, e.g. for glaucoma treatment drainage implants in general A61M27/002
• CPC Class Codes: B01D 29/055 ring shaped
• CPC Class Codes: B82Y 30/00 Nanotechnology for materials or surface science, e.g. nanocomposites

Abstract

A bidirectional flow MEMS filter module (40) is disclosed that uses a plurality of concentrically disposed filtering walls (60). The MEMS filter module (40) includes a first plate (44) having a plurality of first flow ports (48), as well as a second plate (52) having a plurality of second flow ports (56) that is spaced from and interconnected with the first plate (44). The above-noted filtering walls (60) extend from the second plate (52) at least toward the first plate (44). The first plate (44) and each filtering wall (60) are spaced from each other to define a filter trap (64). All flow through the MEMS filter module (40) must pass through at least one filter trap (64) prior to exiting the MEMS filter module (40), either through one or more of the first flow ports (48) or through one or more of the second flow ports (56).

Claims

1. A MEMS filter module, comprising:

a first plate comprising a plurality of first flow ports;

a second plate comprising a plurality of second flow ports;

a plurality of filtering walls, wherein each said filtering wall extends along at least part of one of a plurality of at least generally concentrically disposed filtering wall reference circles, wherein each of said plurality of filtering wall reference circles has at least one associated said filtering wall, wherein each said filtering wall extends from said second plate in a direction of said first plate, and wherein a space between said first plate and each said filtering wall defines a filter trap.

2. The MEMS filter module of claim 1, wherein each said first flow port is disposed on one of a plurality of at least generally concentrically disposed first reference circles, wherein each said first reference circle has at least one associated said first flow port, wherein each said first reference circle is laterally offset from each said filtering wall reference circle such that each said first flow port is laterally offset from each said filtering wall, and wherein a lateral dimension is perpendicular to a thickness dimension of said first and second plates.

3. The MEMS filter module of claim 2, wherein each said second flow port is disposed on one of a plurality of at least generally concentrically disposed second reference circles, wherein each said second reference circle has at least one associated said second flow port, wherein each said second reference circle is laterally offset from each said first reference circle and is laterally offset from each said filtering wall reference circle such that each said second flow port is laterally offset from each said filtering wall and is offset from each said first flow port.

4. The MEMS filter module of claim 1, wherein each said second flow port is disposed on one of a plurality of at least generally concentrically disposed second reference circles, wherein each said second reference circle has at least one associated said second flow port, wherein each said second reference circle is laterally offset from each said filtering wall reference circle such that each said second flow port is laterally offset from each said filtering wall, and wherein a lateral dimension is perpendicular to a thickness dimension of said first and second plates.

5. The MEMS filter module of claim 1, wherein a space between each adjacent pair of said filtering wall reference circles comprises a chamber, wherein a first member of each adjacent pair of said chambers is associated with only a first flow port type and a second member of each said adjacent pair of said chambers is associated with only a second flow port type, wherein said plurality of first flow ports are of said first flow port type, and wherein said plurality of second flow ports are of said second flow port type.

6. The MEMS filter module of claim 5, wherein each said chamber is associated with either a plurality of said first flow ports or a plurality of said second flow ports.

7. The MEMS filter module of claim 5, wherein each said chamber is associated with at least one said first flow port or at least one said second flow port.

8. The MEMS filter module of claim 1, further comprising a plurality of first flow port chambers and a plurality of second flow port chambers, wherein each said first flow port chamber and each said second flow port chamber is bounded in one dimension by said first and second plates and is bounded in a second dimension by each said filtering wall associated with adjacent pairs of said filtering wall reference circles, wherein said first and second flow port chambers are disposed in alternating relation, wherein each said first flow port chamber is associated with only a first flow port type, wherein each said second flow port chamber is associated with only a second flow port type, wherein said plurality of first flow ports are of said first flow port type, and wherein said plurality of second flow ports are of said second flow port type.

9. The MEMS filter module of claim 1, wherein each said filtering wall is annular, such that said plurality of filtering walls are at least generally concentrically disposed.

10. The MEMS filter module claim 9, wherein said plurality of filtering walls are equally spaced.

11. The MEMS filter module of claim 1, wherein a plurality of said filtering walls are disposed on a common said filtering wall reference circle and spaced from each other.

12. The MEMS filter module of claim 1, wherein each said filtering wall terminates prior to reaching said first plate.

13. The MEMS filter module of claim 1, further comprising first and second fabrication levels, wherein said first fabrication level comprises said first plate and said plurality of first flow ports, and wherein said second fabrication level comprises said second plate, said plurality of second flow ports, and said plurality of filtering walls.

14. The MEMS filter module of claim 1, further comprising a plurality of structural interconnects extending between said first and second plates.

15. The MEMS filter module of claim 1, further comprising at least one annular structural interconnect extending between said first and second plates, wherein each of said plurality of first flow ports, said plurality of second flow ports, and said plurality of filtering walls are disposed inwardly of said at least one annular structural interconnect.

16. An implant associated with a first body region and that comprises said MEMS filter module of claim 1 and a conduit, wherein said conduit comprises a flow path that is adapted to fluidly interconnect with the first body region, and wherein said MEMS filter module is disposed in said flow path.

17. The implant of claim 16, further comprising at least one housing, wherein said at least one housing is disposed within said conduit, and wherein said MEMS filter module interfaces with said at least one housing.

18. An implant installable in a human eye and comprising said MEMS filter module of claim 1 and a conduit, wherein said conduit comprises a flow path that is adapted to fluidly interconnect with an anterior chamber of the human eye when said implant is installed, and wherein said MEMS filter module is disposed in said flow path.

19. A MEMS filter module, comprising:

a first plate comprising a plurality of first flow ports;

a second plate comprising a plurality of second flow ports;

a plurality of annular filtering walls that are disposed about a common point, wherein each said filtering wall extends from said second plate in a direction of said first plate, and wherein a space between said first plate and each said filtering wall defines a filter trap.

20. The MEMS filter module of claim 19, wherein a space between each adjacent pair of said filtering walls comprises a chamber, wherein a first member of each adjacent pair of said chambers is associated with only a first flow port type and a second member of each said adjacent pair of said chambers is associated with only a second flow port type, wherein said plurality of first flow ports are of said first flow port type, and wherein said plurality of second flow ports are of said second flow port type.

21. The MEMS filter module of claim 20, wherein each said chamber is associated with either a plurality of said first flow ports or a plurality of said second flow ports.

22. The MEMS filter module of claim 20, wherein each said chamber is associated with at least one said first flow port or at least one said second flow port.

23. The MEMS filter module of claim 19, further comprising a plurality of first flow port chambers and a plurality of second flow port chambers, wherein each said first flow port chamber and each said second flow port chamber is bounded in one dimension by said first and second plates and is bounded in a second dimension by an adjacent pair of said filtering walls, wherein said first and second flow port chambers are disposed in alternating relation, wherein each said first flow port chamber is associated with only a first flow port type, wherein each said second flow port chamber is associated with only a second flow port type, wherein said plurality of first flow ports are of said first flow port type, and wherein said plurality of second flow ports are of said second flow port type.

24. The MEMS filter module of claim 19, wherein said plurality of filtering walls are at least generally concentrically disposed.

25. The MEMS filter module claim 24, wherein said plurality of filtering walls are equally spaced.

26. The MEMS filter module of claim 19, wherein each said filtering wall terminates prior to reaching said first plate.

27. The MEMS filter module of claim 19, further comprising first and second fabrication levels, wherein said first fabrication level comprises said first plate and said plurality of first flow ports, and wherein said second fabrication level comprises said second plate, said plurality of second flow ports, and said plurality of filtering walls.

28. The MEMS filter module of claim 19, further comprising a plurality of structural interconnects extending between said first and second plates.

29. The MEMS filter module of claim 19, further comprising at least one annular structural interconnect extending between said first and second plates, wherein each of said plurality of first flow ports, said plurality of second flow ports, and said plurality of filtering walls are disposed inwardly of said at least one annular structural interconnect.

30. An implant associated with a first body region and that comprises said MEMS filter module of claim 19 and a conduit, wherein said conduit comprises a flow path that is adapted to fluidly interconnect with the first body region, and wherein said MEMS filter module is disposed in said flow path.

31. The implant of claim 30, further comprising at least one housing, wherein said at least one housing is disposed within said conduit, and wherein said MEMS filter module interfaces with said at least one housing.

32. An implant installable in a human eye and comprising said MEMS filter module of claim 19 and a conduit, wherein said conduit comprises a flow path that is adapted to fluidly interconnect with an anterior chamber of the human eye when said implant is installed, and wherein said MEMS filter module is disposed in said flow path.