Abstract: A process for manufacturing a solar cell device, including the steps of (1) forming, on a semiconductor substrate, a removable layer having a crystal lattice structure identical or similar to that of the substrate; (2) forming, on the removable layer, a solar cell structure having a crystal lattice structure identical or similar to that of the removable layer; (3) forming, on the solar cell structure, a reinforcement layer having a sufficient mechanical strength to support solar cell structure, the removal layer being formed of a material whose rate of etching is higher than that of the solar cell structure and the reinforcement layer; (4) and removing the removable layer by etching, to separate the solar cell structure supported by the reinforcement layer from the substrate, so that the surface of the solar cell structure for receiving incident light is exposed.