MAGNETIC TRAP FOR CYLINDRICAL DIAMAGNETIC MATERIALS

• US 20170040217A1
• Filed: 10/20/2016
• Published: 02/09/2017
• Est. Priority Date: 03/13/2013
• Status: Active Grant

• Current Assignee: Elpis Technologies Inc. (Wi-LAN Inc.)
• Original Assignee: International Business Machines Corporation
• Inventors: Cao, Qing, Gunawan, Oki
• Granted Patent: US 10,128,152 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B82Y 40/00 Manufacture or treatment of nanostructures
• CPC Class Codes: F16C 32/0423 with permanent magnets on both parts repelling each other
• CPC Class Codes: F16C 32/0478 with permanent magnets to support radial load
• CPC Class Codes: G01D 5/24 by varying capacitance
• CPC Class Codes: H01F 7/00 Magnets superconducting magnets H01F6/00; for separation of solid materials or fluids B03C1/00; for bench or like work-holders B23B31/28, B23Q3/00; work-holding devices B25B11/00; lifting magnets B66C1/00; operating or controlling locks using permanent magnets E05B47/0038; devices for holding a wing, e.g. door or window, by magnetic or electromagnetic attraction E05C19/16; relieving load or bearings using magnetic means F16C39/06 ; for electric meters G01R; for relays H01H; for electric discharge tubes H01J, e.g. H01J3/24, H01J23/10, H01J29/68 ; for dynamo-electric machines H02K
• CPC Class Codes: H01F 7/02 Permanent magnets [PM]
• CPC Class Codes: H01F 7/0236 Magnetic suspension or levitation for vehicles B60L13/04; magnetic bearings F16C39/063
• CPC Class Codes: H01F 7/0247 Orientating, locating, transporting arrangements
• CPC Class Codes: H01F 7/0273 Magnetic circuits with PM for magnetic field generation
• CPC Class Codes: H01F 7/0284 using a trimmable or adjustable magnetic circuit, e.g. for a symmetric dipole or quadrupole magnetic field
• CPC Class Codes: H01F 7/202 Electromagnets for high magnetic field strength for superconducting electromagnets H01F6/00; for transformers or inductances without a magnetic core H01F30/08
• CPC Class Codes: H01L 21/02697 Forming conducting materials on a substrate
• CPC Class Codes: H01L 21/283 Deposition of conductive or insulating materials for electrodes conducting electric current
• CPC Class Codes: H01L 21/76838 characterised by the formation and the after-treatment of the conductors etching for patterning the conductors H01L21/3213
• CPC Class Codes: H01L 21/76892 modifying the pattern
• CPC Class Codes: H01L 21/76897 Formation of self-aligned vias or contact plugs, i.e. involving a lithographically uncritical step self-aligned silicidation on field effect transistors H01L29/665
• CPC Class Codes: H01L 22/10 Measuring as part of the manufacturing process burn-in G01R31/2855
• CPC Class Codes: H01L 2221/1094 Conducting structures comprising nanotubes or nanowires
• CPC Class Codes: H01L 23/53276 containing carbon, e.g. fullerenes superconducting fullerenes H10N60/853
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/0002 : Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
• CPC Class Codes: H10N 50/01 : Manufacture or treatment
• CPC Class Codes: Y10S 977/762 : Nanowire or quantum wire, i.e. axially elongated structure having two dimensions of 100 nm or less

Abstract

A magnetic trap is configured to arrange at least one diamagnetic rod. The magnetic trap includes first and second magnets on a substrate that forms the magnetic trap defining a template configured to self-assemble diamagnetic material. Each of the first and second magnets extends along a longitudinal direction to define a magnet length, and contact each other to define a contact line. The first magnet and the second magnet have a diametric magnetization in a direction perpendicular to the contact line and the longitudinal direction so as to generate a longitudinal energy potential that traps the diamagnetic rod along the longitudinal direction.

Claims

1. A method of arranging a diamagnetic rod comprising:

arranging first and second magnets on a substrate so as to form at least one magnetic trap defining a template for self-assembling diamagnetic material, each of the first and second magnets extending along a longitudinal direction to define a magnet length;

levitating a diamagnetic rod in a vertical direction perpendicular above a contact line located where the first magnet contacts the second magnet, the first magnet and the second magnet having a diametric magnetization in a direction perpendicular to the contact line and the longitudinal direction so as to generate a longitudinal energy potential that traps the diamagnetic rod along the longitudinal direction, the longitudinal energy potential having a camel-back shaped energy profile.

2. The method of claim 1, wherein the longitudinal energy potential confines the diamagnetic rod in a three-dimensional confinement within the magnetic trap to perform a self-assembling process.

3. The method of claim 2, further comprising:

positioning the diamagnetic rod being levitated above the contact line against a target substrate to form wiring on the target substrate.

4. The method of claim 3, wherein the first magnet and the second magnet make up one magnetic trap among an array of magnetic traps mounted on a template substrate.

5. The method of claim 1, further comprising filtering a rod length of the diamagnetic rod based on the magnet lengths.

6. The method of claim 1, wherein the camel-back shaped energy profile includes a trough region interposed between a pair of peak regions.

7. The method of claim 6, wherein the energy potential confines the diamagnetic rod between the peak regions.

8. The method of claim 7, wherein the diamagnetic rod is levitated at approximately the trough portion.

9. The method of claim 8, wherein the camel-back shaped energy profile determines a length of the diamagnetic rod to be trapped.

10. The method of claim 9, wherein the camel-back shaped energy profile determines the rod length of the trapped diamagnetic rod satisfies a length ratio with respect to the magnet length.

11. A magnetic trap configured to arrange at least one diamagnetic rod, the magnetic trap comprising:

first and second magnets on a substrate that forms the magnetic trap defining a template configured to self-assemble diamagnetic material, each of the first and second magnets extending along a longitudinal direction to define a magnet length, wherein the first magnet contacts the second magnet to define a contact line,

wherein the first magnet and the second magnet have a diametric magnetization in a direction perpendicular to the contact line and the longitudinal direction so as to generate a longitudinal energy potential that traps the diamagnetic rod along the longitudinal direction, the longitudinal energy potential having a camel-back shaped energy profile.

12. The magnetic trap of claim 11, wherein the longitudinal energy potential confines the diamagnetic rod in a three-dimensional confinement within the magnetic trap to perform a self-assembling process.

13. The magnetic trap of claim 12, wherein the first and second magnets position the diamagnetic rod being levitated above the contact line against a target substrate to form wiring on the target substrate.

14. The magnetic trap of claim 13, wherein the first magnet and the second magnet form one magnetic trap among an array of magnetic traps mounted on a template substrate.

15. The magnetic trap of claim 11, wherein the magnet lengths filter a rod length of the diamagnetic rod based on the magnet lengths.

16. The magnetic trap of claim 11, wherein the camel-back shaped energy profile includes a trough region interposed between a pair of peak regions.

17. The magnetic trap of claim 16, wherein the energy potential confines the diamagnetic rod between the peak regions.

18. The magnetic trap of claim 17, wherein the diamagnetic rod is levitated at approximately the trough portion.

19. The magnetic trap of claim 18, wherein the camel-back shaped energy profile determines a length of the diamagnetic rod to be trapped.

20. The magnetic trap of claim 19, wherein the camel-back shaped energy profile determines the rod length of the trapped diamagnetic rod satisfies a length ratio with respect to the magnet length.