Patent ID: 9099334
Filing Date: 2015-08-04
Classification: H01L

Abstract:
1. A semiconductor device, comprising: a plurality of first field effect transistors in a first region of a semiconductor substrate, each said first field effect transistor having a first gate electrode and first sidewall spacers provided over side surfaces of the first gate electrode; and a plurality of second field effect transistors in a second region of the semiconductor substrate which is different from the first region, each said second field effect transistor having a second gate electrode and second sidewall spacers provided over side surfaces of the second gate electrode, wherein the first gate electrode is formed of the same conductive film as that of the second gate electrode, wherein a height of the first gate electrode from a main surface of the semiconductor substrate is the same as a height of the second gate electrode from the main surface of the semiconductor or substrate, wherein a height of each of the second sidewall spacers from the main surface of the semiconductor substrate is shorter than a height of the second gate electrode from the main surface of the semiconductor substrate, and wherein a height of each of the second sidewall spacers from the main surface of the semiconductor substrate is shorter than a height of each of the first sidewall spacers from the main surface of the semiconductor substrate.