| abstract |
(57) [Problem] To provide a polyimide resin film having excellent corrosion resistance, electrical insulation and heat resistance required for magnets used in automobile motors, etc., on the magnet surface based on excellent adhesion. To provide an Fe-B-based permanent magnet and a simple method for producing the same using a solution method. SOLUTION: The surface of the R-Fe-B permanent magnet has a polyimide resin film via an oxide film layer. |