Lecture 8.0. Silicon Crystal Growth. Silicon Mfg. - old. Produce Silicon metal bar Zone Refining – n times To get purity Cut off impure end Use pieces to fill crystallization apparatus Grow Mono-Crystal of large size. Zone Refining. 0=x-Ut, k=C S /C L.
Silicon Crystal Growth
Co=solute concentration in melt or of solid on first pass
Co=0x+L Cs(x)dx - ox-L kCL(x)dx
Melt is maintained with a given impurity concentration
Melting Point is decreased
Solid produced has a given impurity concentation