May 1999 — November 2013
For the first two years, I worked as a field application engineer for trouble shooting overlay, imaging, focus, and productivity issues on customer product .
Starting third year, I worked as a productiviy competency engineer to improved wafer per day by analysing track delays and optimizing machine constants. This job went on for three years.
Next job was defectivity competency engineer to improve immersion defects on product wafers. I analysed which kind of defects and gave customized solutions for different defects. Five years with defectivity competency.
Next job was application supervisor for sk hynix apps engineers. For three years I made an competent team.