The closed-tube method and p-n junction and sheet resistivity methods were used to study diffusion in n-type single crystals. The B surface concentrations ranged from 1019 to 1020/cm3. At 1100 to 1250C, the results could be described by:

D (cm2/s) = 5.1 x 100 exp[-3.70(eV)/kT]

M.Okamura: Japanese Journal of Applied Physics, 1969, 8[12], 1440-8