Kabushiki Kaisha Toshiba

Saburo Nakada

Takahiko Moriya

A method of forming with good reproducibility a high-quality thin film of a metal or metal compound by a vapor growth method on a substrate placed in a quartz reaction tube which has the steps of, prior to the formation of the thin film forming an intermediate film of a material having good adhesion with both quartz, and the metal or metal compound on the inner wall of the reaction tube, and forming a film of the metal or metal compound for the thin film on the intermediate film.

Method of forming a thin film of a metal or metal compound on a substrate

A method of producing a semiconductor device, including the steps of introducing an impurity of one conductivity type into a semiconductor substrate of an opposite conductivity type having an insulating film pattern formed on a surface thereof, using the insulating film pattern as a mask to form a diffusion layer; and forming a metal film on the diffusion layer by selective vapor growth with a mixture of a metal source gas and a carrier gas used as a feed gas. The vapor growth is carried out such that the distance of entry of the metal film from the edge of the insulating film pattern to the interface between the insulating film pattern and the diffusion layer is smaller than the depth of the pn junction of the diffusion layer. The particular method makes it possible to achieve a selective vapor growth of a metal film on the diffusion layer without deteriorating the pn junction characteristics.

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Kawasaki, Japan

Saburo Nakada