Semiconductor device with protective element

摘要

A semiconductor device having a metal oxide semiconductor (MOS) transistor with a gate dielectric film, a gate electrode formed on the gate dielectric film, and source/drain regions formed in a semiconductor substrate. A protective element with a protected electrode overlays of the semiconductor substrate with an intervention of a dielectric film. At least one diffused region is adjacent to the protective electrode in the semiconductor substrate. The protect dielectric is connected to the electrode of the MOS transistor.