Method for manufacturing thin film compound solar cell

A method for manufacturing a thin film compound solar cell having a cell having a compound semiconductor layer in which at least one PN junction is formed, the method comprising:

• a process of forming a compound semiconductor layer comprising at least one PN junction on a side of a substrate;
• a process of forming a rear surface electrode on a surface of the compound semiconductor layer;
• a process of forming a base material made of a polyimide film by applying, annealing and curing polyimide directly on the rear surface electrode;
• a process of attaching a reinforcing material directly to the base material, wherein the reinforcing material is a film, with an adhesive material whose adhesive force is lowered by irradiation of UV light;
• a process of separating the substrate from the compound semiconductor layer;
• a process of forming a surface electrode;
• and
• a process of separating the reinforcing material from the base material by irradiating UV light,
• wherein a thickness of the polyimide film is set between 5 μm and 15 μm.