TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The conducting material comprises at least one material selected from carbon black, graphite and carbon nanotubes. The amount of the conducting material is 0.25-10 parts by weight (pbw) based on 1 pbw of the polymer of the oxazine-based compound. The metal plate comprises a stainless steel plate, aluminum plate or carbon steel plate. The surface of the metal plate includes a groove. Preferred Method: The method further involves processing the surface of the metal plate before the coating of the surface of the metal plate with the coating layer forming composition. The processing of the surface involves at least one process selected from etching, brushing, sandpapering and blasting. The thermally treating is performed at 150-280 degrees C.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: 8 Compounds are given in the specification as the oxazine-based compound, e.g. 6-tert-butyl-3-phenyl-3,4-dihydro-2H-benzo(e)(1,3)oxazine or 6,6'-sulfonylbis(3-phenyl-3,4-dihydro-2H-benzo(e)(1,3)oxazine). EXAMPLE - N,N-dimethylacetamide (3.5 g) was added to 6,6'-sulfonylbis(3-phenyl-3,4-dihydro-2H-benzo(e)(1,3)oxazine) (a1) (0.85 g) as a solvent and then stirred. The mixture was heated to 40-50 degrees C to prepare oxazine (a1) solution. Timrex HSAG 300 (RTM: graphite as conducting carbon) (1.7 g) was added to the oxazine (a1) solution and mixed for 1 hour to obtain a slurry for forming a coating layer, where the oxazine (a1) and Timrex were mixed in a weight ratio of 1:2. The coating layer forming slurry was coated on a stainless steel plate having a thickness of 1.2 mm to a thickness of 50 mu M by using tape casting. The metal plate coated with the coating layer forming slurry was dried in a 100 degrees C-oven for 4 hours to remove the solvent. Then, the resulting metal plate was thermally treated at 250 degrees C to form a coating layer containing a polymer of oxazine (a1) and Timrex on the metal plate, to obtain a bipolar plate for a fuel cell. The electric resistance of the obtained plate with respect to applied pressure was evaluated using an in-house manufactured electric resistance measuring device. The obtained plate at applied pressure of 0.03, 0.31 and 1.57 showed electric resistance of 1563, 134.7 and 20.7 mOhm, respectively.