Patent ID: 8633536
Filing Date: 2014-01-21
Classification: H01L

Abstract:
1. A method for fabricating a semiconductor device, the method comprising: providing a semiconductor substrate having a first, second and third device region; forming a first dielectric layer in the first region; thereafter, forming a second dielectric layer on the second device region; forming a hard mask layer on the first device region on the first dielectric layer; forming the hard mask layer on the second device region concurrently with the forming the hard mask layer on the first device region, wherein the hard mask layer is formed on the second dielectric layer; forming a dummy gate structure on the second dielectric layer; and subsequently, removing the dummy gate structure to form a trench overlying the second dielectric layer, and forming a high-k dielectric layer on the first, second and third device regions, wherein the high-k dielectric layer is formed on the hard mask layer on the first device region, and in the trench and on the hard mask layer on the second dielectric layer.