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Methods for making radially anisotropic thin-film magnetic torroidal cores

United States Patent

9,659,706
May 23, 2017
View the Complete Patent at the US Patent & Trademark Office
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.
Qiu; Jizheng (West Lebanon, NH), Sullivan; Charles R. (West Lebanon, NH)
THE TRUSTEES OF DARTMOUTH COLLEGE (Hanover, NH)
14/ 346,659
20140240074
September 24, 2012
U.S. GOVERNMENT RIGHTS The invention was made with Government support under Department of Energy Grant No. 505904. The Government may have certain rights in this invention.