Thermal buckling of silicon sheet

Results of buckling analyses for three closely related thermal profiles are discussed. They come from the same basic furnace design but reflect changes that occur in the thermal profile when different pull speeds are used to produce wider or thicker ribbon. It is shown that the three profiles differ near the solid-melt interface. Details of the calculation procedure for the in-plane stresses are also given. The shapes associated with the first three modes for each profile are shown. The shape of the first mode for each thermal profile is different. This is primarily due to differing geometry associated with the different pull speeds.