Abstract: In the fabrication of a semiconductor device, an SiO2GeO2 film is formed on a substrate, then washed with water to dissolve the GeO2, leaving a porous SiO2 film. The SiO2GeO2 film may be deposited directly on the substrate, or an SiGe film may be deposited on the substrate and then oxidized to form the SiO2GeO2 film. The porous SiO2 film has an easily controllable dielectric constant and can be advantageously used as an interlayer dielectric film.

Abstract: The present invention provides a semiconductor device which do not form parasitic transistors in device isolation regions and is capable of narrowing device-to-device intervals, and a method of manufacturing the semiconductor device. The method includes a step for anisotropically etching spots that serve as active regions of a sapphire substrate and causing their ends to become substantially normal to the surface of the sapphire substrate, a step for forming a silicon layer so as to be thicker than an etching depth, a step for implanting silicon ions to amorphize the silicon layer, a step for performing annealing and thereby recrystallizing the amorphized silicon layer, and a step for planarizing the recrystallized silicon layer until the sapphire substrate is exposed, thereby to leave the silicon layer that serves as each of the active regions, whereby device-to-device isolation regions can be formed normal to the sapphire substrate.

Abstract: A semiconductor device has an STI oxide film (106), of which surface is positioned higher than the surface of the silicon substrate (100) to prevent a pointed portion and a thin film thickness of a gate oxide film (108). The gate oxide film (106) becomes thicker toward a side wall (112) of the STI oxide film (106) to prevent the leakage current and increase the gate breakdown voltage.

Abstract: The present invention provides a semiconductor device which do not form parasitic transistors in device isolation regions and is capable of narrowing device-to-device intervals, and a method of manufacturing the semiconductor device. The method includes a step for anisotropically etching spots that serve as active regions of a sapphire substrate and causing their ends to become substantially normal to the surface of the sapphire substrate, a step for forming a silicon layer so as to be thicker than an etching depth, a step for implanting silicon ions to amorphize the silicon layer, a step for performing annealing and thereby recrystallizing the amorphized silicon layer, and a step for planarizing the recrystallized silicon layer until the sapphire substrate is exposed, thereby to leave the silicon layer that serves as each of the active regions, whereby device-to-device isolation regions can be formed normal to the sapphire substrate.

Abstract: A semiconductor device has an STI oxide film (106), of which surface is positioned higher than the surface of the silicon substrate (100) to prevent a pointed portion and a thin film thickness of a gate oxide film (108). The gate oxide film (106) becomes thicker toward a side wall (112) of the STI oxide film (106) to prevent the leakage current and increase the gate breakdown voltage.

Abstract: In order to achieve a method for analyzing the compositional distribution of deposited film adhering to the internal surface of a contact hole having a diameter in the deep submicron order, primary ions 18 are radiated into the surface 12a of an insulating film 12 where the contact hole 14 is formed to generate secondary ions 20. The primary ions are radiated into the surface of the insulating film from a constant diagonal direction. Then, mass spectrometry is performed on the resulting secondary ions to detect the compositional distribution of the deposited film 16 formed at the internal surface of the contact hole. Thus, the compositional distribution of the deposited film is ascertained over the depth-wise direction of the contact hole.