Abstract:Full factorial and Taguchi orthogonal arrays were used to characterize the silicon nitride low pressure chemical vapor deposition (LPCVD) process for film uniformity and particle density. Thickness and refractive index were measured using standard ellipsometric techniques. Particles were measured on patterned wafers using a Tencor Surfscan 7000 particle counter with pattern recognition capability. Both design methodologies produced identical results, with particles most dependent on total gas volume, and unifo… Show more
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