Patent ID: 8912607
Filing Date: 2014-12-16
Classification: H01L

Abstract:
1. A semiconductor structure comprising a first field effect transistor and a second field effect transistor that are located on a semiconductor substrate, wherein said first field effect transistor comprises: and wherein said second field effect transistor comprises: wherein said first gate dielectric includes a first contiguous gate dielectric portion containing a first horizontal gate dielectric portion and a first vertical gate dielectric portion extending upward from peripheral regions of said first horizontal gate dielectric portion, said second gate dielectric includes a second contiguous gate dielectric portion containing a second horizontal gate dielectric portion and a second vertical gate dielectric portion extending upward from peripheral regions of said second horizontal gate dielectric portion, and one of said first contiguous gate dielectric portion and said second contiguous gate dielectric portion contacts a planar top surface of a planar high dielectric constant material portion having a constant thickness throughout and the other of said first horizontal gate dielectric portion and said second horizontal gate dielectric portion not contacting said planar high dielectric constant material portion contacts a planar top surface of an interfacial dielectric material portion having a different composition than said planar high dielectric constant material portion.