Patent ID: 8080452

Claim:
A method for selective deposition of Si or SiGe on a Si or SiGe surface, comprising: providing a substrate with a Si or SiGe surface layer that has at least one first surface region which is doped with Boron at a concentration of at least 1×10 19 cm −3 and in which subsequent growth of Si or SiGe is to be either inhibited or completely suppressed, and with at least one second surface region which is not doped with Boron at a concentration of at least 1×10 19 cm −3 and in which subsequent growth of Si or SiGe is to be performed; prebaking the substrate surface layer by exposing to a passivating ambient atmosphere at a temperature which is lower than or equal to about 800° C.; exposing the substrate surface layer to deposition conditions that are suitable for subsequent deposition of a Si or SiGe overlayer, thus inhibiting or completely suppressing growth of Si or SiGe in the at least one first surface region and depositing Si or SiGe in the at least one second surface region; and performing an annealing at an annealing temperature for an annealing time span that are suitable for forming a metal-rich silicide phase in the first surface region of the Si or SiGe surface layer and for forming a metal-poor silicide phase in the Si or SiGe overlayer and in the Si or SiGe surface layer in the second surface region, wherein performing the annealing comprises performing: a first annealing at a first annealing temperature for a first annealing time span, which first annealing temperature and first annealing time span are suitable for forming the metal-rich silicide phase in the first surface region of the Si or SiGe surface layer and in the second surface region of the Si or SiGe overlayer, leaving at least some of the Si or SiGe surface layer in the second surface region underneath the metal-rich silicide phase unmetallized; and a second annealing at a second annealing temperature and for a second annealing time span, which second annealing temperature and second annealing time span are suitable for forming the metal-poor silicide in the Si or SiGe overlayer and in the Si or SiGe surface layer in the second surface region.