NOVELTY - The fluorine-doped silicon-oxide film (14) is formed on a base-material (12) surface by supplying electric power and plasmifying mixed gas. The mixed gas contains silicon tetrafluoride, oxygen and hydrocarbon. The base-material surface contains ethylene-tetrafluoroethylene type copolymers (50 mass% or more). The electric power is supplied between the electrodes with electric-power density of 0.5-1.1 W/cm3 and discharge is generated. Thus, manufacture of ethylene-tetrafluoroethylene type copolymer molded product (10) is carried out.    USE - Manufacture of ethylene-tetrafluoroethylene type copolymer molded product used for protective film of built-in-kitchen, surface film of white board for markers, metal mold release film, outdoor-type film, and display materials such as plasma-chemical vapor deposition apparatus, liquid crystal display, cathode ray tube and solar cell, and agricultural film.    ADVANTAGE - The method provides ethylene-tetrafluoroethylene type copolymer molded product with excellent hydrophilicity and light transmittance.    DETAILED DESCRIPTION - The fluorine-doped silicon-oxide film is formed on a base-material surface by supplying electric power and plasmifying mixed gas. The mixed gas contains silicon tetrafluoride, oxygen and hydrocarbon. The base-material surface contains ethylene-tetrafluoroethylene type copolymers (50 mass% or more). The electric power is supplied between the electrodes with electric-power density of 0.5-1.1 W/cm3 and discharge is generated. Thus, manufacture of ethylene-tetrafluoroethylene type copolymer molded product is carried out. The atomic ratio of oxygen and carbon in the mixed gas is 1-10. The atomic ratio of oxygen and silicon in the mixed gas is 1.7-25. The atomic ratio of oxygen and silicon in silicon-oxide film is 1.6-2.5. The atomic ratio of fluorine and silicon in silicon-oxide film is 0.05-0.50. The molar ratio of the polymer unit based on a tetrafluoroethylene and polymer unit based on ethylene, in an ethylene-tetrafluoroethylene type copolymer is 30/70-70/30.    DESCRIPTION OF DRAWING(S) - The drawing shows the sectional-view of the ethylene-tetrafluoroethylene type copolymer molded product.    Ethylene-tetrafluoroethylene type copolymer molded product (10)    Base material (12)    Silicon-oxide film (14)