Method of forming silicon nitride film and product

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427 94, 427255, 4272552, 428446, 437241, B32B 904, C23C 1634

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046998250

ABSTRACT:
In forming a silicon nitride film by the low-pressure CVD method using a silane gas and ammonia, the reaction pressure is set to lie over a range of from about 0.05 to about 0.25 Torr, enabling a silicon nitride film to be formed, of uniform thickness, highly efficiently even on large wafers, and maintaining high yield, improved uniformity and good quality as a whole without decreasing the film-forming efficiency. Preferably, the reaction pressure is maintained over a range of from 0.1 to 0.2 Torr to further increase the efficiency, while preferably maintaining the temperature over a range of from 700.degree. to 1000.degree. C.

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Ginsburgh et al, "Silicon Nitride Chem. Vapor Deposition in a Hot-Wall Diffusion System", J. Electrochem. Sci & Tech., vol. 125, No. 9, pp. 1557-1559, Sep. 1978.
Olcaytug et al, "A Low Temperature Process for the Reactive Formation of Si.sub.3 N.sub.4 Layers on InSb", Thin Solid Films, vol. 67, pp. 321-324, 1980.

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