A direct-current reactive phase plasma-sputtering technique was used to obtain a B diffusion-source in the form of a borosilicate glass. The sheet resistance of Si was measured using a four-point probe technique, and the depth of the diffusion lyer as determined by lapping and staining. The B diffusion coefficient in Si as a unction of the B surface concentration was deduced (table 22).
Boron Diffusion from a Reactively Sputtered Glass Source in Si and SiO2. G.D.Bagratishvili, R.B.Jishiashvili, L.V.Piskanovski, Z.N.Sholashvili: Physica Status Solidi A, 1979, 56[1], 27-35
Table 22
Diffusion Parameters for B at 1150C
B2O3 at surface (/cm3) | Do (cm2/s) | Q (eV) |
3 x 1018 | 4.5 x 104 | 4.84 |
6 x 1019 | 1 x 103 | 4.37 |
1 x 1020 | 1 x 10-2 | 2.95 |
5 x 1020 | 2.5 x 10-3 | 2.72 |