摘要:
A semiconductor device with overlapping contacts is provided. In one aspect, the semiconductor device includes a dielectric layer; a first contact located in the dielectric layer; and a second contact located in the dielectric layer adjacent to the first contact, wherein a portion of the second contact overlaps a top surface of the first contact.
摘要:
One method discloses performing an etching process to form a contact opening in a layer of insulating material above at least a portion of a source/drain, region wherein, after the completion of the etching process, a portion of a gate structure of the transistor is exposed, selectively forming an oxidizable material on the exposed gate structure, converting at least a portion of the oxidizable material to an oxide material, and forming a conductive contact in the contact opening that is conductively coupled to the source/drain region. A novel transistor device disclosed herein includes an oxide material positioned between a conductive contact and a gate structure of the transistor, wherein the oxide material contacts the conductive contact and contacts a portion, but not all, of the exterior surface of the gate structure.
摘要:
Embodiments of the present invention provide an improved method for fabrication of fin field effect transistors (finFETs). Sacrificial regions are formed on a semiconductor substrate. Spacers are formed adjacent to two sides of the sacrificial regions. Fins are formed based on the spacers. One set of spacers is treated as dummy spacers, and is removed prior to fin formation, leaving the other set of spacers to be used for forming fins on the final semiconductor structure. All the fins on the final semiconductor structure are formed from spacers on one side of the sacrificial material. This reduces variation in width of the fins.
摘要:
A method for semiconductor fabrication includes forming at least one of a diffusion barrier layer and a metal containing layer over a dielectric layer in a gate cavity. A first anneal is performed to diffuse elements from the at least one of the diffusion barrier layer and the metal containing layer into the dielectric layer. The metal containing layer and the diffusion barrier layer are removed. A second anneal is performed to adjust diffusion of the elements in the dielectric layer to provide a gate dielectric region.
摘要:
One method disclosed herein includes forming at least one sacrificial sidewall spacer adjacent a sacrificial gate structure that is formed above a semiconducting substrate, removing at least a portion of the sacrificial gate structure to thereby define a gate cavity that is laterally defined by the sacrificial spacer, forming a replacement gate structure in the gate cavity, removing the sacrificial spacer to thereby define a spacer cavity adjacent the replacement gate structure, and forming a low-k spacer in the spacer cavity. A novel device disclosed herein includes a gate structure positioned above a semiconducting substrate, wherein the gate insulation layer has two upstanding portions that are substantially vertically oriented relative to an upper surface of the substrate. The device further includes a low-k sidewall spacer positioned adjacent each of the vertically oriented upstanding portions of the gate insulation layer.
摘要:
One method disclosed includes forming a gate structure of a transistor above a surface of a semiconducting substrate, forming a sidewall spacer proximate the gate structure, forming a sacrificial layer of material above the protective cap layer, sidewall spacer and substrate, forming an OPL layer above the sacrificial layer, reducing a thickness of the OPL layer such that, after the reduction, an upper surface of the OPL layer is positioned at a level that is below a level of an upper surface of the protective cap layer, performing a first etching process to remove the sacrificial layer from above the protective cap layer to expose the protective cap layer for further processing, performing a second etching process to remove the protective cap layer and performing at least one process operation to remove at least one of the OPL layer or the sacrificial layer from above the surface of the substrate.
摘要:
Fabrication methods for a device structure and device structures. A trench isolation region is formed that bounds an active device region of a semiconductor substrate. A first semiconductor layer is formed on the active device region and on the trench isolation region. A first airgap is formed between the first semiconductor layer and the active device region. A second airgap is formed between the first semiconductor layer and the trench isolation region. The first airgap extends into the active device region such that the height of the first airgap is greater than the height of the second airgap.
摘要:
At least one isolation trench formed in a layer stack including substrate, channel, and upper gate layers define a channel in the channel layer. Lateral etching from the isolation trench(es) can form lateral cavities in the substrate and upper gate layer to substantially simultaneously form self-aligned lower and upper gates. The lower gate undercuts the channel, the upper gate is narrower than the channel, and a source and a drain can be formed on opposed ends of the channel. As a result, source-drain capacitance and gate-drain capacitance can be reduced, increasing speed of the resulting FET.
摘要:
An approach and apparatus are provided for optimizing and combining different semiconductor technologies into a single graphic data system. Embodiments include generating a planar semiconductor layout design, generating a three-dimensional (e.g., FinFET) semiconductor layout design, and combining the planar design and the FinFET design in a common graphic data system.