Abstract:
A method includes forming a line feature above a substrate. Carbon-containing spacers are formed on sidewalls of the line feature. A first dielectric layer is formed above the carbon spacers and the line feature. The first dielectric layer is planarized to expose upper ends of the carbon-containing spacers. An ashing process is performed to remove the carbon-containing spacers and define air gaps adjacent the line feature. A cap layer is formed to seal the upper ends of the air gaps.
Abstract:
Integrated circuits and methods for fabricating integrated circuits are provided. In an embodiment, a semiconductor substrate includes a shallow trench isolation structure disposed therein. A gate electrode structure overlies semiconductor material of the semiconductor substrate. A first sidewall spacer is formed adjacent to the gate electrode structure, with a first surface of the shallow trench isolation structure exposed and spaced from the first sidewall spacer by a region of the semiconductor material. The first surface of the shallow trench isolation structure is masked with an isolation structure mask. The region of the semiconductor material is free from the isolation structure mask. A recess is etched in the region of the semiconductor material, with the isolation structure mask in place. A semiconductor material is epitaxially grown within the recess to form an epitaxially-grown semiconductor region adjacent to the gate electrode structure.
Abstract:
A method includes forming a line feature above a substrate. Carbon-containing spacers are formed on sidewalls of the line feature. A first dielectric layer is formed above the carbon spacers and the line feature. The first dielectric layer is planarized to expose upper ends of the carbon-containing spacers. An ashing process is performed to remove the carbon-containing spacers and define air gaps adjacent the line feature. A cap layer is formed to seal the upper ends of the air gaps.
Abstract:
In one aspect there is set forth herein an integrated circuit having a first plurality of field effect transistors and a second plurality of field effect transistor, wherein field effect transistors of the first plurality of field effect transistors each have a first gate stack and wherein field effect transistors of the second plurality of field effect transistors each have a second gate stack, the second gate stack being different from the first gate stack by having a metal layer common to the first gate stack and the second gate stack that includes a first thickness at the first gate stack and a second thickness at the second gate stack.
Abstract:
Semiconductor devices and methods for forming devices with ultraviolet curing. One method includes, for instance: obtaining a wafer; forming at least one mandrel; forming spacers adjacent to the at least one mandrel; performing an ultraviolet treatment to at least one set of spacers; and etching to form hard mask regions below at least the spacers. An intermediate semiconductor device includes, for instance: a substrate; a stop layer over the substrate; a first barrier layer over the stop layer; at least one first mandrel and at least one second mandrel on the first barrier layer; at least one first set of spacers positioned adjacent to the first mandrel; at least one second set of spacers positioned adjacent to the second mandrel; and a second barrier layer over the at least one first mandrel and the at least one first set of spacers.
Abstract:
A semiconductor structure with mixed n-type and p-type non-planar transistors includes a residual overlapping mask bump on one or more of the dummy gates. A dielectric layer is created over the structure having a top surface above the residual bump, for example, using a blanket deposition and chemical-mechanical underpolish (i.e., stopping before exposing the gate cap). The residual bump is then transformed into a same material as the dielectric, either in its entirety and then removing the combined dielectric, or by removing the dielectric first and partly removing the residual bump, the remainder of which is then transformed and the dielectric removed. In either case, the structure is planarized for further processing.
Abstract:
Integrated circuits with stressed semiconductor substrates, processes for preparing stressed semiconductor substrates, and processes for preparing integrated circuits including stressed semiconductor substrates are provided herein. An exemplary process for preparing a stressed semiconductor substrate includes providing a semiconductor substrate of a semiconductor material having a first crystalline lattice constant; introducing a dopant on and into a surface layer of the semiconductor substrate via ion implantation at an amount above a solubility limit of the dopant in the semiconductor material to form a dopant-containing surface layer of the semiconductor substrate; applying energy to the dopant-containing surface layer of the semiconductor substrate with an ultra-short pulse laser to form a molten semiconductor:dopant layer on a surface of the semiconductor substrate; and removing the energy such that the molten semiconductor:dopant layer forms a solid semiconductor:dopant layer with a second crystalline lattice having a second lattice constant that differs from the first lattice constant.
Abstract:
Circuit structure fabrication methods are provided which include: providing an interlayer structure above a substrate, the interlayer structure including porogens dispersed within a dielectric material; and pulse laser annealing the interlayer structure to form a treated interlayer structure, the pulse laser annealing polymerizing the dielectric material of the interlayer structure to form a polymeric dielectric material, that includes pores disposed therein. The pulse laser annealing facilitates increasing elasticity modulus of the treated interlayer structure by, in part, maintaining structural integrity of the treated interlayer structure, notwithstanding that there are pores disposed within the polymeric dielectric material which, for instance, facilitates reducing dielectric constant of the treated interlayer structure.