| 简介 |
PROBLEM TO BE SOLVED : To provide a treatment solution and a method for forming a fluoride coating film, by which a layer containing fluoride is formed on the surface of a magnetic body continuously at a low temperature with an appropriate film thickness to improve magnetic characteristics.
SOLUTION : The treatment solution for forming a fluoride coating film is composed of : a solvent consisting mainly of alcohol; and a rare earth fluoride or an alkaline earth metal fluoride, which is dispersed in the solvent. At least one of the peaks of the solution that are detected by X-ray diffraction forms a half-value width of more than one degree. Further, an insulating film is also formed.
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