Abstract: The present invention provides a transistor, a semiconductor device and a transistor fabrication process that thoroughly ameliorate electric fields in a transistor element. Namely, the transistor includes a semiconductor substrate, incline portions, a gate electrode, side walls, and a source and a drain. The semiconductor substrate includes a protrusion portion at a surface thereof. The incline portions constitute side surface portions of the protrusion portion and are inclined from the bottom to the top of the protrusion portion. The gate electrode is formed on the top of the protrusion portion, with a gate insulation film interposed therebelow. The side walls are formed on the top of the protrusion portion at two side surfaces of the gate electrode and the gate insulation film. The source and the drain each include a low density region and a high-density region.

Abstract: A semiconductor integrated circuit production method prepares an SOI layer thickness database that correlates measurement data of each SOI layer thickness with each SOI substrate identification data. The production method extracts the measurement data for each SOI substrate from the SOI layer thickness database, and carries out layer thickness adjustment surface treatment for the SOI substrates based on these data. A semiconductor integrated circuit production device includes an SOI layer thickness database storage unit for storing the SOI layer thickness database, and a layer thickness adjustment conditions control unit for extracting the measurement data for each SOI substrate from the SOI layer thickness database and deciding conditions for the layer thickness adjustment surface treatment based on these data.

Abstract: A semiconductor integrated circuit production method prepares an SOI layer thickness database that correlates measurement data of each SOI layer thickness with each SOI substrate identification data. The production method extracts the measurement data for each SOI substrate from the SOI layer thickness database, and carries out layer thickness adjustment surface treatment for the SOI substrates based on these data. A semiconductor integrated circuit production device includes an SOI layer thickness database storage unit for storing the SOI layer thickness database, and a layer thickness adjustment conditions control unit for extracting the measurement data for each SOI substrate from the SOI layer thickness database and deciding conditions for the layer thickness adjustment surface treatment based on these data.