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AssigneeDenso Corporation
InventorsKen MATSUBARA, Jung Hwan HWANG
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A method produces a coating treatment solution to be used for forming a ferrite film having a spinel type crystal structure MFe2O4 on a surface of a soft magnetic material. The coating treatment solution contains a solution having a metal element and Fe. The metal element becomes divalent cations in the solution. The method prepares a first solution containing the metal element M and Fe, prepares a second solution by adding an alkaline solution to the first solution in a non-oxidizing atmosphere. The method produces the coating treatment solution by using the second solution.
A method of producing a coating treatment solution comprising a solution containing a metal element M and iron, the metal element becoming divalent cations, the coating treatment solution being used for forming a ferrite film having a spinel type crystal structure MFe2O4 on a surface of a soft magnetic material, comprising steps of:
A coating treatment solution comprising a solution containing a metal element M and iron, the metal element becoming divalent cations, and the coating treatment solution being used for forming a ferrite film having a spinel type crystal structure MFe2O4 on a surface of a soft magnetic material, and the coating treatment solution containing the metal element M and iron and having a pH within a range of 7 to 12.
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