 |
The TEM micrograph shows a loose network of dislocations between "regular"
and heavily B-doped Silicon. The expected square network has not yet fully developed. Many dislocations are "on
their way" from the surface to their proper place in the interface. |
|
 |
The geometry is also not too well defined, because there is no abrupt change of lattice constants
as in the case of phase boundaries between chemically different phases. The lattice constant changes continuously following
the B-concentration which obeys some diffusion profile. |
|
|
|
|
On occasions, a stacking fault network instead of a dislocation network is observed
as shown below. The reasons for this unclear. Stacking faults of this gigantic size should be totally unstable and would
be expected to unfault. |
| |
|
© H. Föll (Defects - Script)
With frame
8.1.1 Phase Boundaries