Abstract: A semiconductor composite apparatus, includes a first substrate, a semiconductor thin film layer, active devices, first driving circuits, and second driving circuits. The semiconductor thin film layer is formed on the first substrate and is formed of a first semiconductor material. The active devices are formed in the semiconductor thin film layer. The first driving circuits is formed of a second semiconductor material and performing a first function in which the active devices are driven. The second driving circuits are formed of a third semiconductor material and performing a second function in which the active devices are driven, the second function being different from the first function.

Abstract: A semiconductor composite apparatus includes a substrate and a planarizing layer, and a semiconductor thin film. The planarizing layer is formed on the substrate either directly or indirectly. The planarizing layer includes a first surface that faces the substrate, and a second surface that is on the side of the planarizing layer remote from the substrate. The semiconductor thin film formed on the planarizing layer. The second surface has a roughness of not more than 5 nm.

Abstract: A semiconductor device includes a substrate, conductive layer, semiconductor thin films, and individual electrodes. The conductive layer is formed on the substrate and serves as a common electrode. The thin films are bonded on the conductive layer. Each of the plurality of semiconductor thin films includes at least one active region and a contact layer that is in electrical contact with the conductive layer. Each of the individual electrodes is formed on a surface of a corresponding one of the semiconductor thin films in electrical contact with the active region. The thin film may be a single thin film that includes a plurality of active regions formed therein, in which case a different common electrode may be used instead of the common electrode which is in contact with the surface and is electrically isolated from the individual electrodes.