| 摘要 |
A silicon nitride film is formed above a semiconductor substrate so as to cover a gate electrode. Next, a silicon thermal oxidation film is formed on the surface of the silicon nitride film by carrying out thermal oxidation processing on the silicon nitride film. In the case that a pinhole exists in the silicon nitride film, the inside of the pinhole is also oxidized so as to be filled in with the silicon thermal oxidation film. Next, a silicon nitride film is formed by carrying out anisotropic etching on the silicon nitride film. After that, a contact hole is formed in the silicon oxide film, which is formed above the semiconductor substrate. A bit line contact part is formed within the contact hole and, then, a bit line is formed. Thereby, a semiconductor device is gained wherein an electrical short circuit can be prevented.
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