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Title: Methods for making radially anisotropic thin-film magnetic torroidal cores

Patent ·
OSTI ID:1358237
;

A method of forming a radially anisotropic toroidal magnetic core includes providing apparatus having a first magnet for providing a radial magnetic field extending across a cavity from an axial spindle to a surrounding second magnetic element, placing a substrate in the cavity, the substrate having a hole fitting around the head of the spindle; and sputter-depositing a film of ferromagnetic material onto the substrate. In an embodiment, the spindle is magnetically coupled to a first pole of the first magnet, the second magnetic element is coupled to a second pole of the first magnet, and a thermally conductive, nonmagnetic, insert separates the spindle and the second magnetic element.

Research Organization:
THE TRUSTEES OF DARTMOUTH COLLEGE, Hanover, NH (United States)
Sponsoring Organization:
USDOE
Assignee:
THE TRUSTEES OF DARTMOUTH COLLEGE
Patent Number(s):
9,659,706
Application Number:
14/346,659
OSTI ID:
1358237
Resource Relation:
Patent File Date: 2012 Sep 24
Country of Publication:
United States
Language:
English

References (4)

Cylindrical permanent magnet to produce a transversal and uniform induction field patent March 1991
Manufacturing method of magnetoresistive effect sensor and manufacturing method of thin-film magnetic head patent-application January 2003
Substrate holder for a vapour deposition system patent-application March 2006
Information Storage Device Using Movement Of Magnetic Domain Wall, And Methods Of Manufacturing And Operating The Information Storage Device patent-application June 2008

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36 MATERIALS SCIENCE