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Methods for making radially anisotropic thin-film magnetic torroidal cores

United States Patent

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)
14/ 346,659
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.