Abstract:
Formation of semiconductor structures employing selective removal of fins includes, for example, providing a substrate having a first plurality of fins having first hard masks thereon, a second plurality of fins having second hard masks thereon, the first hard mask being different from the second hard mask, depositing a first fill material between lower portions of the first and second fins, depositing a third hard mask layer on the first fill material between the first and second fins, depositing a second fill material on the third hard mask extending between upper portions of the first and second fins, selectively removing the second hard masks and the second fins to form open cavities in the first and second fill material, depositing a third fill material in the opened cavities, and removing the second fill material and the third fill material above the third hard mask to form a fin-cut region.
Abstract:
A dual-strained Si and SiGe FinFET device with dielectric isolation and a dual-strained nanowire device and methods of forming them are provided. Embodiments include a SiGe SRB formed on a silicon substrate, the SRB having a first region and a second region; a first and a second dielectric isolation layer formed on the first region and on the second region of the SiGe SRB, respectively; a tensile strained Si fin formed on the first dielectric isolation layer; a compressive strained SiGe fin formed on the second dielectric isolation layer; first source/drain regions formed at opposite sides of the tensile strained Si fin; second source/drain regions formed at opposite sides of the compressive strained SiGe fin; a first RMG formed between the first source/drain regions; and a second RMG formed between the second source/drain regions.
Abstract:
A method of fabricating raised fin structures is provided, the fabricating including: providing a substrate and at least one dielectric layer over the substrate; forming a trench in the at least one dielectric layer, the trench having a lower portion, a lateral portion, and an upper portion, the upper portion being at least partially laterally offset from the lower portion and being joined to the lower portion by the lateral portion; and, growing a material in the trench to form the raised fin structure, wherein the trench is formed to ensure that any growth defect in the lower portion of the trench terminates either in the lower portion or the lateral portion of the trench and does not extend into the upper portion of the trench.
Abstract:
One method disclosed herein includes, among other things, forming sidewall spacers adjacent opposite sides of a sacrificial gate electrode of a sacrificial gate structure, forming a tensile-stressed layer of insulating material adjacent the sidewall spacers, removing the sacrificial gate structure to define a replacement gate cavity positioned between the sidewall spacers, forming a replacement gate structure in the replacement gate cavity, forming a tensile-stressed gate cap layer above the replacement gate structure and within the replacement gate cavity and, after forming the tensile-stressed gate cap layer, removing the tensile-stressed layer of insulating material.
Abstract:
One method disclosed herein includes, among other things, forming sidewall spacers adjacent opposite sides of a sacrificial gate electrode of a sacrificial gate structure, forming a tensile-stressed layer of insulating material adjacent the sidewall spacers, removing the sacrificial gate structure to define a replacement gate cavity positioned between the sidewall spacers, forming a replacement gate structure in the replacement gate cavity, forming a tensile-stressed gate cap layer above the replacement gate structure and within the replacement gate cavity and, after forming the tensile-stressed gate cap layer, removing the tensile-stressed layer of insulating material.