The effect of a static magnetic field on buoyancy-aided silicon dissolution into germanium melt

Seed Production and Melt Replenishment for the Czochralski Growth of Silicon Germanium

“…This would seem to indicate a lower concentration of silicon in the center region. The composition proles, as measured with EDS, support the trend of a lower silicon concentration in the center of the melt [20].…”

“…This highlights the increased mixing present in the melt with the larger diameter due to the contribution of stronger convection in the melt [20]. The decreased diameter crucibles used in the current experiment work do help to weaken convection in the melt.…”

“…While the interface shows signs of improved stability, the concentration proles obtained from the EDS results continued to show a high degree of scatter [20]. This scatter was also present in the samples without the applied eld.…”

“…As seen from the thermal analysis [20], the outer region of the melt remains hotter than the inside until the melt reaches a thermal steady--state. Therefore, it is estimated intuitively that the thermal characteristic of the present system (melt being hotter near the crucible vertical wall) leads to a convective ow in the melt with two convection cells (symbolic representation of natural convection) circulating upward along the wall and downward in the centre (just opposite to what was observed in the LPD growth of SiGe in [14,16,17]), as shown schematically in Fig.…”

Effect of an applied static magnetic field on silicon dissolution into a germanium melt

“…As a continuation of the dissolution experiments performed earlier [8,9], we have performed dissolution experiments under a vertical static applied magnetic field to study the effect of the applied magnetic field (8 kG) on the dissolution rate for a configuration similar to that used in Cz and LPD growth of SiGe and to see whether the dissolution rate can be increased.…”