Abstract:
Devices and methods for forming semiconductor devices with fins at tight fin pitches are provided. One method includes, for instance: obtaining an intermediate semiconductor device; growing an epi layer over the substrate; forming a doped layer below the epi layer; depositing a first oxide layer on the epi layer; applying a dielectric material on the first oxide layer; and depositing a lithography stack on the dielectric material. One intermediate semiconductor device includes, for instance: a substrate with at least one n-well region and at least one p-well region; a doped layer over the substrate; an epi layer over the doped layer; a first oxide layer over the epi layer; a dielectric layer over the first oxide layer; and a lithography stack over the dielectric layer.
Abstract:
Devices and methods for forming semiconductor devices with wider FinFETs for higher tunability of the varactor are provided. One method includes, for instance: obtaining an intermediate semiconductor device; applying a spacer layer over the semiconductor device; etching the semiconductor device to remove at least a portion of the spacer layer to expose the plurality of mandrels; removing the mandrels; etching the semiconductor device to remove a portion of the dielectric layer; forming at least one fin; and removing the spacer layer and the dielectric layer. One intermediate semiconductor device includes, for instance: a substrate; a dielectric layer over the substrate; a plurality of mandrels formed on the dielectric layer, the mandrels including a first set of mandrels and a second set of mandrels, wherein the first set of mandrels have a width twice as large as the second set of mandrels; and a spacer layer applied over the mandrels.
Abstract:
Devices and methods for forming semiconductor devices with fins at tight fin pitches are provided. One method includes, for instance: obtaining an intermediate semiconductor device; growing an epi layer over the substrate; forming a doped layer below the epi layer; depositing a first oxide layer on the epi layer; applying a dielectric material on the first oxide layer; and depositing a lithography stack on the dielectric material. One intermediate semiconductor device includes, for instance: a substrate with at least one n-well region and at least one p-well region; a doped layer over the substrate; an epi layer over the doped layer; a first oxide layer over the epi layer; a dielectric layer over the first oxide layer; and a lithography stack over the dielectric layer.
Abstract:
Semiconductor devices and methods of fabricating the semiconductor devices with chamfer-less via multi-patterning are disclosed. One method includes, for instance: obtaining an intermediate semiconductor device; performing a trench etch into a portion of the intermediate semiconductor device to form a trench pattern; depositing an etching stack; performing at least one via patterning process; and forming at least one via opening into a portion of the intermediate semiconductor device. An intermediate semiconductor device is also disclosed.
Abstract:
Methods of MOL S/D contact patterning of RMG devices without gouging of the Rx area or replacement of the dielectric are provided. Embodiments include forming a SOG layer around a RMG structure, the RMG structure having a contact etch stop layer and a gate cap layer; forming a lithography stack over the SOG and gate cap layers; patterning first and second TS openings through the lithography stack down to the SOG layer; removing a portion of the SOG layer through the first and second TS openings, the removing selective to the contact etch stop layer; converting the SOG layer to a SiO2 layer; forming a metal layer over the SiO2 layer; and planarizing the metal and SiO2 layers down to the gate cap layer.
Abstract:
There is set forth herein a field effect transistor (FET) configured as an ESD protection device. In one embodiment, the FET can be configured to operate in a snapback operating mode. The FET can include a semiconductor substrate, a gate formed on the substrate and a dummy gate formed on the substrate spaced apart from the gate.
Abstract:
Methods are presented for facilitating fabrication of a semiconductor device, such as a gate-all-around nanowire field-effect transistor. The methods include, for instance: providing at least one stack structure including at least one layer or bump extending above the substrate structure; selectively oxidizing at least a portion of the at least one stack structure to form at least one nanowire extending within the stack structure(s) surrounded by oxidized material of the stack structure(s); and removing the oxidized material from the stack structure(s), exposing the nanowire(s). This selectively oxidizing may include oxidizing an upper portion of the substrate structure, such as an upper portion of one or more fins supporting the stack structure(s) to facilitate full 360° exposure of the nanowire(s). In one embodiment, the stack structure includes one or more diamond-shaped bumps or ridges.
Abstract:
Devices and methods for forming semiconductor devices with metal-titanium oxide contacts are provided. One intermediate semiconductor device includes, for instance: a substrate, at least one field-effect transistor disposed on the substrate, a first contact region positioned over at least a first portion of the at least one field-effect transistor between a spacer and an interlayer dielectric, and a second contact region positioned over at least a second portion of the at least one field-effect transistor between a spacer and an interlayer dielectric. One method includes, for instance: obtaining an intermediate semiconductor device and forming at least one contact on the intermediate semiconductor device.
Abstract:
Devices and methods for forming semiconductor devices with FinFETs are provided. One method includes, for instance: obtaining an intermediate semiconductor device with a substrate and at least one shallow trench isolation region; depositing a hard mask layer over the intermediate semiconductor device; etching the hard mask layer to form at least one fin hard mask; and depositing at least one sacrificial gate structure over the at least one fin hard mask and at least a portion of the substrate. One intermediate semiconductor device includes, for instance: a substrate with at least one shallow trench isolation region; at least one fin hard mask over the substrate; at least one sacrificial gate structure over the at least one fin hard mask; at least one spacer disposed on the at least one sacrificial gate structure; and at least one pFET region and at least one nFET region grown into the substrate.
Abstract:
A non-planar diode is fabricated, with an n- or p-type raised structure, such as a fin, coupled to the substrate. A well of an opposite type is located under the raised structure, along with an area having additional impurity, located directly under the raised structure, and within the well. This additional implant creates a p-n junction within the substrate, the non-planar diode having an ideality factor in a range of 1 to about 1.05.