Patent ID: 7253085

Claim:
A deposition method, comprising: providing a substrate, the substrate comprising a first surface and a second surface; the first surface comprising monocrystalline silicon and the second surface consisting essentially of electrically insulative material; exposing the first and second surfaces to at least one semiconductor material precursor under conditions in which growth of semiconductor material from the at least one precursor over the first and second surfaces comprises a lag phase period prior to a growth phase, and under which it takes longer for the growth phase to initiate on the second surface than on the first surface; the exposing being conducted for long enough for the growth phase to occur on the first surface, but not for long enough for the growth phase to substantially occur on the second surface; and wherein: the exposing is conducted in a reaction chamber and comprises a pulse of the at least one precursor into the chamber followed by a purge to substantially entirely remove the at least one precursor from within the chamber; a sequence comprising two or more of the pulses is utilized to form a thickness of semiconductor material; and a different semiconductor precursor is flowed into the chamber during at least one of the two or more pulses relative to at least one other of the two or more pulses.