Patent ID: 9064732
Filing Date: 2015-06-23
Classification: H01L

Abstract:
1. A semiconductor device comprising: a semiconductor substrate including a first region and a second region, wherein the first region is a logic region and the second region is a memory region; a first high-k dielectric film pattern on the first region; a second high-k dielectric film pattern of the same thickness as the first high-k dielectric film pattern, on the second region; a first work function control film pattern on the first high-k dielectric film pattern and having a first thickness; a second work function control film pattern on the first work function control film pattern and having a second thickness; a third work function control film pattern on the second high-k dielectric film pattern made of the same material as, and being thinner than, the first work function control pattern; and a fourth work function control film pattern on the third work function control film pattern made of the same material as, and being thicker than, the second work function control film pattern.