Polyimide resin film having a rare-earth permanent magnet

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PROBLEM TO BE SOLVED : To provide a method for manufacturing a rare earth base permanent magnet, having a polyamide resin cover film, where the film which is superior in anticorrosion, electrical insulation and thermal resistance is formed on the magnet using a simple method and with satisfactory adherence. SOLUTION : A solution, obtained by dissolving an additional polyamide resin in the mixed solvent of an aromatic solvent and an oxygen-containing solvent, is applied to the surface of the rare earth material base permanent magnet. Thereafter, the resultant is heated and cured in the range of 100 to 400 deg.C.