NOVELTY - The formation and processing method involves using a nail for attaching a rafter to a back surface of a corrugated shaped galvanized steel plate. A thin film solar cell (1) is formed on a front surface of the corrugated shaped galvanized steel plate, after the rafter is fixed to the back surface of the corrugated shaped galvanized steel plate. A galvanized iron is plated by placing it inside a plating bath containing base material of 43.4% of aluminum (Al), 55% of zinc (Zn) and 1.6% of silicon (Si) alloy, or 91% of Zn, 6% of Al and 3% of magnesium (Mg).    USE - Method for forming and processing thin film solar cell such as UNI-SOLAR cell on surface of corrugated shaped galvanized steel plate used in roof surface such as folded-plate roof surface, and slate roof surface of house, warehouse, factory (all claimed) and henhouse.    ADVANTAGE - The solar cell can be easily and firmly attached on the surface of corrugated shaped galvanized steel plate so that the assembly can be used as a roof of a house directly. The peeling of solar cell from on the surface of a corrugated shaped galvanized steel plate can be prevented. The nail can be used for attaching rafter to corrugated shaped galvanized steel plate, so that the rain water approaching from the portion of the hole can be prevented. A corrugated shaped galvanized steel plate can be prevented from being rust, and the solar cell is provided with sufficient generating efficiency to generate electric power from household use. The decline in the electric conversion rate by raise of the surface temperature of a solar cell can be suppressed, and it can be utilized as roof at reduced cost with easy electric wiring. The utilization effect of the corrugated shaped galvanized steel plate can be prolonged for long period of time without any corrosion. The external appearance of the solar cell is made very glossy, so that the beautiful roof can be formed. The asbestos cement sheet is provided with the specific structure so as to endure human being's load.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) attachment method of folded plate roof and slate roof;    (2) repairing method of asbestos cement sheet; and    (3) attachment method of solar cell.    DESCRIPTION OF DRAWING(S) - The drawing shows the schematic view illustrating the attachment structure of solar cell and iron plate large wave.    Solar cell (1)    Iron plate large wave (34)    Strip shaped iron plate (37)    Cylindrical-shaped washer (39)    Asphalt packing (40)