Journal of the Electrochemical Society, Vol.141, No.7, 1957-1963, 1994
Source Drain Dislocations and Electrical Leakage in Titanium-Salicided CMOS Integrated-Circuits
This investigation explored the dependencies of source/drain (S/D) dislocation density, test circuit quiescent current, and junction leakage on processing variables in a titanium-salicided submicron CMOS process using Taguchi methodology. The primary factor affecting both gate and field edge dislocation densities was the type of polysilicon-to-metal dielectric (PMD) film. PECVD oxide PMD leads to lower defect densities than LPCVD oxides. Primary factor affecting quiescent current (I(CCQ)) include PMD film type and S/D implant conditions. The observation of both lower dislocation density and lower I(CCQ) leakage for similar PMD film type is taken as strong evidence linking dislocations with device electrical performance.