Patent ID: 7804133
Filing Date: 2010-09-28
Classification: H01L

Abstract:
1. A semiconductor storage device comprising: a first semiconductor region provided in a semiconductor substrate including a buried insulator having opening portions; a second semiconductor region provided in the semiconductor substrate without including the buried insulator, the second semiconductor region being different from the first semiconductor region; a plurality of first semiconductor element devices disposed above the buried insulator in the first semiconductor region; a plurality of second semiconductor element devices each disposed in a region including a region above the opening portion of the buried insulator in the first semiconductor region; and a plurality of third semiconductor element devices disposed in the second semiconductor region, wherein levels of interfaces between first gate insulators and first gate electrodes provided on the gate insulators of the first semiconductor element devices, between second gate insulators and second gate electrodes of the second semiconductor element devices, and between third gate insulators and third gate electrodes of the third semiconductor element devices are equivalent to each other.