A novel NiSi process with a thin Ti-cap layer is proposed, for the first time, to improve the leakage problem of Ni-silicided junction. The Ti-cap samples exhibit a very low leakage current density about 1×10-9 A/cm2 after 600 °C annealing, which is one order of magnitude reduction comparing with uncapped samples. From Auger analyzes, it is found that this significant improvement results from suppression of the oxidation of the Ni-silicide during the thermal annealing process.
|Number of pages||2|
|Journal||IEEE Electron Device Letters|
|State||Published - 1 Nov 1999|