• Y Syamasundara Rao

      Articles written in Pramana – Journal of Physics

    • A microprocessor based autoscanner for electromigration studies in thin films

      M Dhanabalan Y Syamasundara Rao K V Reddy

      More Details Abstract Fulltext PDF

      Mass transport due to electromigration can be estimated if the diffusion coefficientD and the electromigration effective charge numberZ* are known. Neutron activated tracer scanning method determine the radioactivity at different positions. An automatic scanning system for determining the radioactive concentration profiles developed using a microprocessor is described in this paper. Using the radioactive concentration profiles the electromigration shift is determined. From this shift the electromigration effective charge numberZ* is calculated. The system developed was tested for tin thin films.

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