Method and apparatus for depositing material onto a surface

• US 7,690,325 B2
• Filed: 04/29/2005
• Issued: 04/06/2010
• Est. Priority Date: 04/30/2004
• Status: Expired due to Fees

• Current Assignee: BioForce Nanosciences, Inc.
• Original Assignee: BioForce Nanosciences, Inc.
• Inventors: Xu, Juntao, Henderson, Eric R., Mosher, Curtis L., Huff, Janice Lillian, Lynch, Michael P., Nettikadan, Saju Rappai
• Primary Examiner(s): Tadesse; Yewebdar T
• Application Number:
  US11/120,042
• Publication Number:
  US 20050266149A1
• Time in Patent Office: 1,803 Days
• Field of Search: 118/300, 118/401, 118313-315, 422/100, 422/63, 422/65, 422/124.29, 422/124.3, 436/180, 436/174, 436/43, 436/49, 738/640.1, 738/640.2, 738/641.4, 401137-138, 401/145, 401/253, 401/286, 295/58, 417/413.2, 417/413.3
• US Class Current: 118/300
• CPC Class Codes: B01J 2219/00387 Applications using probes
• CPC Class Codes: B01J 2219/00659 Two-dimensional arrays
• CPC Class Codes: B01L 2200/12 Specific details about manufacturing devices
• CPC Class Codes: B01L 2200/143 Quality control, feedback systems
• CPC Class Codes: B01L 2300/0816 Cards, e.g. flat sample carriers usually with flow in two horizontal directions
• CPC Class Codes: B01L 2300/0838 Capillaries
• CPC Class Codes: B01L 2300/10 Means to control humidity and/or other gases
• CPC Class Codes: B01L 2400/02 Drop detachment mechanisms of single droplets from nozzles or pins
• CPC Class Codes: B01L 2400/0406 capillary forces
• CPC Class Codes: B01L 3/0244 using pins
• CPC Class Codes: B01L 3/0248 Prongs, quill pen type dispenser

Abstract

Some embodiments of the present invention provide an apparatus and method in which material is deposited upon a surface from an elongated beam having an aperture defined therein through which the material is moved by passive adsorption. The elongated beam can be substantially planar along substantially its entire length, can be oriented at an acute angle with respect to the surface during deposition processes, and can have a length no greater than about 2 mm. In some embodiments, the aperture can be elongated, can extend from a material reservoir to a location short of the terminal end of the elongated beam or through the terminal end of the elongated beam, and can have a portion extending through the thickness of the elongated beam.

Claims

1. An apparatus for depositing material onto a surface, the apparatus comprising:

a base having a width;

a substantially planar elongated beam having a proximal portion extending from the base and a distal portion located a distance from the proximal portion such that the substantially planar elongated beam forms a cantilever with respect to the base, the substantially planar elongated beam having a length of no greater than about 2 mm, the substantially planar elongated beam having a width and being smaller than the width of the base and a terminal end, the width of the substantially planar elongated beam adjacent the terminal end being tapered toward the terminal end;

an elongated aperture defined in the substantially planar elongated beam, the elongated aperture at least partially defining an inner surface dimensioned to move liquid along the elongated aperture by passive adsorption, the elongated aperture having a distal portion from which material is deposited onto the surface; and

a reservoir in fluid communication with a proximal portion of the elongated aperture, wherein the reservoir is configured to retain the material to be deposited, and wherein the reservoir is wider than the substantially planar elongated beam and is positioned in the base,

wherein the substantially planar elongated beam is one of a plurality of substantially planar elongated beams extending from the base to facilitate simultaneous deposition of at least one material onto the surface.

2. The apparatus of claim 1, wherein the length of the substantially planar elongated beam is no less than about 100 nm and is no greater than about 1 mm.

3. The apparatus of claim 1, wherein at least a portion of the elongated aperture is tapered in width along at least a portion of the elongated aperture.

4. The apparatus of claim 1, wherein the elongated aperture extends to and terminates at a location disposed a distance from a terminal end of substantially planar the elongated beam.

5. The apparatus of claim 1, wherein the elongated aperture extends to and through a terminal end of the substantially planar elongated beam.

6. The apparatus of claim 1, wherein:

the substantially planar elongated beam includes an upper surface and a lower surface; and

the upper surface and the lower surface are substantially parallel, flat, and planar along the length of substantially planar the elongated beam.

7. The apparatus of claim 1, wherein:

the substantially planar elongated beam has a thickness,

the elongated aperture includes a first portion having a depth less than the thickness of the substantially planar elongated beam, and

the elongated aperture includes a second portion having a depth equal to about the thickness of the substantially planar elongated beam.

8. An apparatus for depositing material onto a surface, the apparatus comprising:

a base having a width;

a plurality of elongated beams each having a width and being smaller than the width of the base extending from the base in a cantilevered configuration, each of the plurality of elongated beams oriented at an acute angle with respect to the surface and having

a substantially planar upper surface along substantially its entire length;

a substantially planar lower surface along substantially its entire length;

a proximal portion extending from the base;

a distal portion located a distance from the proximal portion; and

an elongated aperture defined in the elongated beam, the elongated aperture at least partially defining an inner surface adapted to facilitate movement of the material along the elongated aperture by passive adsorption, and a distal portion adapted for at least one of material loading into the elongated beam and material deposition from the elongated beam;

wherein each elongated aperture is in fluid communication with a reservoir located in the base and configured to retain the material.

9. The apparatus of claim 8, wherein:

each elongated beam has a thickness; and

at least a portion of at least one elongated aperture extends through the thickness of the respective elongated beam.

10. The apparatus of claim 8, wherein at least a portion of at least one elongated aperture is tapered toward a terminal end of the respective elongated beam.

11. The apparatus of claim 8, wherein at least a portion of at least one elongated beam is tapered toward a terminal end of the respective elongated beam.

12. The apparatus of claim 8, wherein:

each elongated beam has a length no greater than about 2 mm; and

the thickness of each elongated beam is no less than about 2 microns and is no greater than about 3 microns.

13. The apparatus of claim 8, wherein the distal portion of each elongated aperture is no greater than about 1 micron in width.

14. The apparatus of claim 8, wherein the distal portion of each elongated beam and the distal portion of each elongated aperture are shaped to produce a spot having a diameter no less than about 2 microns and no greater than about 3 microns.

15. The apparatus of claim 8, wherein each elongated aperture is in fluid communication with a respective reservoir located in the base and configured to retain the material.