NOVELTY - The method involves forming a conductive carbon layer (1), and forming overcoat layer on the conductive carbon layer. A mask (4) is located on the overcoat layer, and the conductive carbon layer is irradiated with UV light from above the mask in an atmosphere that contains oxygen, while having the mask closely adhered to the overcoat layer. The overcoat layer is comprised with the composition chosen from group of hydrolyzate of hydrolyzable organosilane. Shielding portion of predetermined pattern comprised by shielding material by which UV-ray is shielded.    USE - Method for forming film such as electrically conductive film and insulating film (all claimed). Can also be used for substrate for touchscreen, solar cell and display panel of LCD, plasma display, LED display and organic electroluminescent display.    ADVANTAGE - High-resolution electro conductive film can be obtained easily. Adhesiveness of the overcoat layer and mask can be improved, impurity in single wall carbon nanotube can be removed and purity in single wall carbon nanotube can be improved by filtration process. Fall of electro conductive decline in the light transmittance by the impurity can be prevented.    DETAILED DESCRIPTION - Thickness of overcoat layer is 1 nm-1 micrometer. Resin is provided in the surface of the shielding portion, and resin is photoresist and thermosetting resin chosen from the group of resist material. The mask is closely contacted with the overcoat layer based on pressurization and heat, and UV-ray has a wavelength in the range of 10-400 nm and 150-180 nm. Irradiation accumulated light quantity of the UV-ray is 50-500000mJ/cm and 500-30000mJ/cm. The oxygen pressure of the atmosphere has the oxygen is in the range of 101-21273 Pa and 1013-10130 Pa. The conductive carbon layer is comprised by grapheme and carbon nanotube. The conductive carbon layer is comprised by single wall carbon nanotube which received the acid treatment. INDEPENDENT CLAIMS are included for the following:    (1) electrically conductive film; and    (2) insulating film.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic sectional of the laminated constitution after UV irradiation.    Conductive carbon layer (1)    UV irradiation portion (1a)    Substrate (2)    Overcoat layer (3)    Mask (4)