1989
DOI: 10.1002/crat.2170240816
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In‐situ doping of and trench‐refill with LPCVD‐poly‐silicon (I). (PH3/SiH4) ratio as a process‐controlling parameter

Abstract: In-situ Doping of and Trench-Refill with LPCVD-poly-Silicon (I).(PHs/SiH4) Ratio as a Process-Controlling Parameter The ratio of phosphine-t o silaiie concentration in the reaction gas mixture is a processcontrolling parameter in LPCVD-polysilicon deposition not only with respect to doping level of the layer and layer growth rate on planar wafer surface, but also with respect t o tlie degree of growth rate depression occurring by change-over from wafer surface to sidewall area within trenches in the region … Show more

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