Patent ID: 8963224
Filing Date: 2015-02-24
Classification: H01L

Abstract:
1. A semiconductor device, comprising: a semiconductor substrate; a transistor element, a capacitor, and a resistor formed on the same semiconductor substrate; a first active region, a second active region, and an element isolation having a surface larger in height than a surface of the first active region and a surface of the second active region, the first active region, the second active region, and the element isolation region being disposed on the semiconductor substrate; a well region of a first conductivity type formed in the first active region along a main surface of the semiconductor substrate; a gate oxide film disposed on the well region; a gate electrode disposed on the gate oxide film, and a lower electrode for the capacitor disposed on the second active region, the gate electrode and the lower electrode being formed of a first polysilicon film; a source region and a drain region both having a second conductivity type disposed in a surface of the well region so as to sandwich the gate electrode; a capacitor insulator disposed on the lower electrode; and an upper electrode for the capacitor and having impurities of the second conductivity type disposed on the capacitor insulator, and a resistor having impurities of the first conductivity type disposed on the element isolation region, the upper electrode and the resistor being formed of a second polysilicon film, wherein: the second polysilicon film forming the resistor has a thickness smaller than a thickness of the second polysilicon film forming the upper electrode and the thickness difference therebetween is determined depending on the difference between the surface heights of the first active region and the element isolation region and on a thickness of the first polysilicon film; and the resistor is positioned so that an upper surface thereof is one of larger in height than an upper surface of the gate electrode and equal in height to the upper surface of the upper electrode.