Semiconductor integrated circuit device having single-element type nonvolatile memory elements

摘要

A semiconductor integrated device having a non-volatile memory element or memory cell of a single-element type in a non-volatile memory circuit employing a field effect transistor which has, in addition to a floating gate electrode for storage of information and a controlling gate electrode, a source which includes a heavily doped region having a depth into the semiconductor substrate extending from the major surface thereof which is large. The single-element type field effect transistor, furthermore, has a drain which includes a lightly doped region which has a depth extending into the semiconductor substrate from the major surface thereof which is small.