HIGH-TEMPERATURE X-RAY TOPOGRAPHY OF Si WAFERS STRAINED BY THIN SURFACE FILMS

Abstract
Room-temperature and elevated-temperature transmission x-ray topographs of Si wafers coated with different types of films were taken to show the change in the stress in the films as a function of temperature. Anodic oxide films grown at 100°C show a reversal of the sense of stress at 200°C, while steam oxide, grown at 1200°C, show almost no change in topographs taken up to 800°C. In the case of metal films, the stress in Pt films vanishes at 230°C and remains absent at least up to 615°C, while little change is seen in W films, even in topographs taken at 800°C.

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