Low-temperature formation of polycrystalline silicon films by molecular beam deposition

Abstract
Textured polycrystalline-silicon films are obtained by molecular beam deposition under ultrahigh vacuum at temperatures between 400 and 700 °C. Thinner films have a 〈110〉 preferred orientation, whereas a 〈100〉 preferred orientation is dominant in films with a thickness of above 1 μm. The deviation of the textured axes decreases from 20° to 10° with raising substrate temperature from 400 to 700 °C. A depth-dependent preferred orientation inside the film is also observed.