Patent ID: 9728462
Date: 2017-08-08
CPC Classifications: H01L

Claim:
1. A multiple threshold voltage transistor structure, the structure comprising: at least one first transistor having a high-k dielectric material with a first height on sidewalls of a first trench, the high-k dielectric material having the first height being formed directly on a fin; and at least one second transistor having the high-k dielectric material with a second height on sidewalls of a second trench, the high-k dielectric material having the second height being formed directly on the fin, wherein the first height of the high-k dielectric material in the at least one first transistor is less than the second height of the high-k dielectric material in the at least one second transistor, wherein the first height and the second height are defined from the fin, wherein the at least one first transistor and the at least one second transistor have a voltage threshold difference of about 80 millivolts such that the at least one first transistor has a lower voltage threshold than the at least one second transistor.