Method of making nickel zinc ferrite by liquid-phase epitaxial growth
AssigneeHitachi, Ltd.
InventorsKunihiro Maeda, Hiromichi Imahasi, Matsunosuke Kikuchi
Life of this patent
Estimating the term…
Abstract
A method of making nickel zinc ferrite by liquid-phase epitaxial growth at constant temperature ferrite thin films having desired magnetic properties can easily be formed by preparing the metal oxide melt components from which the ferrite thin films are epitaxially crystallized. The ferrite thin films are suitable for various electronic parts.
Claims4
A method for forming nickel zinc ferrite, which comprises immersing a crystal substrate in a supercooled melt comprising lead oxide, iron oxide, 6% by weight or less of boron oxide or lead fluoride, and such amounts of nickel oxide and zinc oxide that the molar ratio ZnO/(NiO + ZnO) is 0.8 or smaller and then in a supercooled melt comprising lead oxide, iron oxide, zinc oxide, and 6% by weight or less of boron oxide or lead fluoride to form by epitaxial growth at least two layers of nickel zinc ferrite and zinc ferrite on said substrate, and then converting the resulting layers into a homogeneous single layer of nickel zinc ferrite by thermal diffusion treatment.
Dependencies are inferred from the claim text.