To provide a process for producing a semiconductor, which can form a CVD film at a high film-forming rate with a good step coverage, good uniformities of film forming rate and sheet resistance in the in-plane region of a wafer and a good reproducibility at every wafers, and an apparatus for treating a semiconductor for the process. Plural plates are arranged side by side between the first window including its periphery and the second window including its periphery, and overlapping one another with gaps between them. The light yellow oleaginous substances obtained posses a variety of physiological functions such as strengthening immunity, protecting the liver and inhibiting tumor cell growth, etc. Using a deflector, the beam is scanned over an area of the specimen surface, and backscattered charged particles produced by the irradiated area of the specimen are detected. These are anchored to and use the hoop strength of the containment shell as leverage. Further, the LPP is formed in a position displaced from a centerline of the land in the radial direction by a predetermined amount.