ESR studies of ion implanted phosphorus donors near the Si-SiO2 interface

Details ESR studies of ion implanted phosphorus donors near the Si-SiO2 interface ESR studies of ion implanted phosphorus donors near the Si-SiO2 interface

2010-02-09

arxiv.org/abs/1002.1764v1

Physics

Condensed Matter

Materials Science

13 pages, 5 figures, regular paper

Scientific paper

This work reports an ESR study of low energy, low fluence phosphorus ion implantation into silicon in order to observe the activation of phosphorus donors placed in close proximity to the Si-SiO2 interface. Electrical measurements, which were used to estimate donor activation levels, reported high implant recoveries when using 14 keV phosphorus ions however, it was not possible to correlate the intensity of the hyperfine resonance signal with the electrical measurements in the presence of an SiO2 interface due to donor state ionisation (i.e. compensation effects). Comparative measurements made on silicon with an H-passivated surface reported higher donor hyperfine signal levels consistent with lower surface defect densities at the interface.

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