Browse Prior Art Database

Method for Creating Three Dimensional Microstructures

IP.com Disclosure Number: IPCOM000121242D
Original Publication Date: 1991-Aug-01
Included in the Prior Art Database: 2005-Apr-03
Document File: 2 page(s) / 73K

Publishing Venue

IBM

Related People

Hodgson, RT: AUTHOR [+4]

Abstract

Disclosed is a method of nanomachining to make nanometer size objects using scanning tunnelling microscope (STM) technology. As an example, a magnetic read and write head is disclosed which would have 10 nm resolution.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 52% of the total text.

Method for Creating Three Dimensional Microstructures

      Disclosed is a method of nanomachining to make nanometer
size objects using scanning tunnelling microscope (STM) technology.
As an example, a magnetic read and write head is disclosed which
would have 10 nm resolution.

      A method of writing fine lines on conducting surfaces is
described in [*].  This patent teaches that processes used in
semiconductor technology can be carried out at nanometer length
scales.  However, semiconductor technology is largely done by making
a large number of layers and patterning each layer.  The possibility
of building discrete devices in a different way than this planar
process is disclosed, and the construction of a magnetic head or
read/write head is given as an example which would be able to read
magnetic information coded on a magnetic material with a length scale
measured down to a few nanometers.

      A sketch of the proposed head is shown in the figure. An
electrically conducting magnetic material, such as Ni(81%)-Fe(19%)
ferrite alloy, is formed in the form of a hollow cone 1 about a
center cone 2 electrically conducting, magnetically insulating
material.  One embodiment of the device would have the two materials
separated by an electrically insulating material so that
magneto-resistance could be used to read the magnetic field at the
small end of the cone.

      In the normal state, the magnetic flux would be contained
mostly in the magnetic material, circulating around in a plane
perpendicular to the axis 3 of the cone. Additional highly permeable
magnetic material, such as ferrite (which is not shown in the
figure), is used to provide a nearly continuous closed magnetic
ci...