TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Process: The hydrophilization or peeling treatment is carried out, by contacting the film with ozone or irradiating with ultraviolet rays having wavelength of 100-300 nm.    TECHNOLOGY FOCUS - POLYMERS - Preferred Compounds: The polymer compound is a copolymer having a segment (A) having acidic ionic conductivity, which is covalently bonded to a segment (B) which does not have acidic ionic conductivity. The principal chain which forms the polymer segments (A and B) carries out covalent bonding of aromatic ring and the bonding group. The principal chain which forms the segments (A and B) of copolymer has perfluoroalkane structure. A sulfonic acid group is contained in the polymer side chain as an acidic ionic conductive group.Preferred Property: The polymer compound has ion exchange capacity of 0.5-3 meq/g. EXAMPLE - 4,4'-dihydroxy benzophenone (in g) (106), 4,4'-dichloro diphenyl sulfone (148.2), potassium carbonate (88.9), 1,3-dimethyl-2-imidazolidinone (500 ml) and toluene (200 ml), were heated and reacted at 150degreesC with stirring in nitrogen atmosphere. After removing toluene, the components were reacted at 180degreesC for 8 hours, added with 4,4'-dichloro diphenyl sulfone (9.2) and further reacted for 2 hours. The formed precipitate was washed, dried and reprecipitated in methanol to form oligomer (185) having glass transition temperature of 157degreesC, thermal decomposition temperature of 500degreesC and number average molecular weight of 2000. The oligomer (17.7), 2,5-dichloro-4'-(4-phenoxy) phenoxy benzophenone (25.7), bis(triphenyl phosphine) nickel dichloride (1.18), sodium iodide (1.17), triphenyl phosphine (6.3) and zinc dust (9.41), were substituted with nitrogen, added with N-methyl-2-pyrrolidone (100 ml) and heated to 80degreesC. Polymerization was carried out for 4 hours. The polymer solution was filtered, solidified and precipitated. The precipitate was dried, solidified, and reprecipitated in methanol. The precipitate was filtered and vacuum-dried to form copolymer (36.5) having number average molecular weight (Mn) of 42300 and weight average molecular weight (Mw) of 161900.    The copolymer (16) was added with 98% sulfuric acid (160 ml) and maintained at 25degreesC for 24 hours. The solution was poured into ion exchange water and the settled polymer was washed and dried to form sulfonic acid group-containing polymer (17) with yield of 92%, sulfonic acid equivalent of 2.1 meq/g, Mn of 47700 and Mw of 180000. The polymer (5) was added with N-methyl pyrrolidone (20.6) and methanol (10.3) and stirred for 24 hours to form uniform polymer solution. The solution was coated on a polyethylene terephthalate film, and dried at 80degreesC for 30 minutes and 150degreesC for 1 hour. A uniform, transparent solid electrode film having thickness of 90 microns was formed. The film was washed with water and hydrochloric acid having pH of 1 and air dried. A proton conduction film having conductivity of 0.083 S/cm at 60degreesC and 80% RH, and 0.035 S/cm at 25degreesC and 80% RH, and excellent bondability with electrodes, was obtained.