In this thesis, the development of integrated Schottky barrier diode (SBD) in 0.35um and 0.25um BCD technology is described. In order to improve the breakdown voltage, the trade off between on-resistance, and reverse leakage current, we use the simulation tools to analyze the characteristics of SBD. The two-dimensional simulation helps us to design SBD in the cross-sectional view. In addition, the three-dimensional simulation makes us have further improvement by flexible design in the device top patterns. Finally, the experimental results are given to confirm our analytic work.