Boron of 10keV and boron-fluoride of 45keV are implanted at the dose of 1× 10~(15)cm~(-2)into self-preamorphized (100) n-typa silicon. In both boron dopants are im- planted with equivalent energy. Samples are annealed with rapid thermal annealing (RTA) subsequently at temperature of 1000℃ for 2, 5 and 10 seconds. The junction depth and carrier electrical activity of boron and boron-fluoride doped samples are compared by means of spreading resistance profile(SRP). The residual damage in samples is investigat...