Patent ID: 7336535
Filing Date: 2008-02-26
Classification: G11C,H01L

Abstract:
1. A semiconductor integrated circuit device comprising a first MISFET formed on a semiconductor substrate and representing a part of an analog circuit, a nonvolatile memory element formed on the semiconductor substrate, and a plurality of field insulating films formed in the semiconductor substrate and separating the first MISFET and nonvolatile memory element, wherein: the first MISFET has a first gate electrode, a first drain region and a first source region, the nonvolatile memory element has a control gate electrode, a floating gate electrode, a second drain region and a second source region, the control gate electrode is formed in a first region of a nonvolatile memory element forming region and includes first impurity regions in the semiconductor substrate, the second drain region and second source region are formed in a second region of the nonvolatile memory element forming region and include second impurity regions in the semiconductor substrate, the first and second regions are separated by the field insulating films, the floating gate electrode is formed over the first region, the field insulating films and the second region, the floating gate electrode and the first gate electrode of the first MISFET are formed of a same layer, the nonvolatile memory element is used for storing data of a trimming voltage used in the analog circuit, and the storing data is performed electrically.