Magnetic trap for cylindrical diamagnetic materials

Patent metadata

Field	Value
Publication number	US-10468301-B2
Application number	US-201816036118-A
Country	US
Kind code	B2
Filing date	Jul 16, 2018
Priority date	Mar 13, 2013
Publication date	Nov 5, 2019
Grant date	Nov 5, 2019

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.

First claim

What is claimed is:

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 magnet lengths, respectively;
levitating a diamagnetic rod in a vertical direction perpendicular above a contact line located where the first magnet directly 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, wherein the longitudinal energy potential confines the diamagnetic rod in a three-dimensional confinement within the magnetic trap to perform a self-assembling process,
positioning the diamagnetic rod being levitated above the contact line against a target substrate to form wiring on the target substrate,
wherein the first magnet has a first outer surface extending along the magnet lengths between respective opposing ends, wherein the second magnet has a second outer surface extending along the magnet lengths between respective opposing ends, wherein the first outer surface of the first magnet is in continuous direct contact with the second outer surface of the second magnet.

2. The method of claim 1 , wherein the first magnet and the second magnet make up one magnetic trap among an array of magnetic traps mounted on a template substrate.

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

4. The method of claim 1 , wherein the camel-back shaped energy profile includes a trough region.

5. The method of claim 4 , wherein the trough region is interposed between a pair of peak regions.

6. The method of claim 5 , wherein the longitudinal energy potential confines the diamagnetic rod between the peak regions.

7. The method of claim 6 , wherein the diamagnetic rod is levitated at approximately the trough portion.

8. The method of claim 7 , wherein the camel-back shaped energy profile determines a length of the diamagnetic rod to be trapped.

9. The method of claim 8 , wherein the rod length of the trapped diamagnetic rod satisfies a length ratio.

10. The method of claim 9 , wherein the length ratio is determined with respect to the magnet length.

Assignees

• IBM

Inventors

• Cao Qing
• Gunawan Oki

Classifications

• H10P74/20

  characterised by the properties tested or measured, e.g. structural or electrical properties · CPC title

• H10P14/40

  of conductive or resistive materials · CPC title

• H10W20/0554

  of nanotubes or nanowires · CPC title

• H10W20/4462

  Carbon or carbon-containing materials, e.g. graphene · CPC title

• H10W20/069

  by forming self-aligned vias or self-aligned contact plugs · CPC title