Patent ID: 9018054
Filing Date: 2015-04-28
Classification: H01L

Abstract:
1. A method of simultaneously forming filled metal-comprising gate structures having more than one channel length for use in field effect transistors such as a planar FET or a Fin-FET, said method comprising: forming FETs having more than one channel length simultaneously on a single substrate, wherein a first channel length is 15 nm or less, and at least one additional channel length ranges between more than 15 nm to about 60 nm, wherein a gap fill material which is not present in said first channel length is present in said at least one additional channel length, and wherein a single series of steps are carried out to simultaneously form said filled metal-comprising gate structures, which steps include deposition of a plurality of layers of material, etchback of at least one layer of material, and chemical mechanical polishing of at least one layer of material.