Various embodiments include methods and integrated circuit structures. In some cases, an integrated circuit (IC) structure includes: a substrate; a set of fin structures overlying the substrate, the set of fin structures including a substrate base and a silicide layer over the substrate base; an oxide layer located between adjacent fins in the set of fin structures; and a nitride layer over the set of fin structures, wherein a height of the nitride layer is substantially uniform across the set of fin structures.

Semiconductor devices and methods for manufacturing the same are provided. An example method may include: forming a sacrificial gate stack on a substrate; forming a gate spacer on sidewalls of the sacrificial gate stack; forming an interlayer dielectric layer on the substrate and planarizing it to expose the sacrificial gate stack; partially etching back the sacrificial gate stack to form an opening; expanding the resultant opening so that the opening is in a shape whose size gradually increases from a side adjacent to the substrate towards an opposite side away from the substrate; and removing a remaining portion of the sacrificial gate stack and forming a gate stack in a space defined by the gate spacer.

A method of manufacturing a semiconductor device includes forming a preliminary fin-type active pattern extending in a first direction, forming a device isolation pattern covering a lower portion of the preliminary fin-type active pattern, forming a gate structure extending in a second direction and crossing over the preliminary fin-type active pattern, forming a fin-type active pattern having a first region and a second region, forming a preliminary impurity-doped pattern on the second region by using a selective epitaxial-growth process, and forming an impurity-doped pattern by injecting impurities using a plasma doping process, wherein the upper surface of the first region is at a first level and the upper surface of the second region is at a second level lower than the first level.

An integrated circuit (IC) device may include a first active transistor of a first-type in a first-type region. The first active transistor may have a first-type work function material and a low channel dopant concentration in an active portion of the first active transistor. The IC device may also include a first isolation transistor of the first-type in the first-type region. The second active transistor may have a second-type work function material and the low channel dopant concentration in an active portion of the first isolation transistor. The first isolation transistor may be arranged adjacent to the first active transistor.

Embodiments are directed to a method of forming portions of a fin-type field effect transistor (FinFET) device. The method includes forming at least one source region having multiple sides, forming at least one drain region having multiple sides, forming at least one channel region having multiple sides, forming at least one gate region around the multiple sides of the at least one channel region and forming the at least one gate region around the multiple sides of the at least one drain region.

Embodiments are directed to a method of forming portions of a fin-type field effect transistor (FinFET) device. The method includes forming at least one source region having multiple sides, forming at least one drain region having multiple sides, forming at least one channel region having multiple sides, forming at least one gate region around the multiple sides of the at least one channel region and forming the at least one gate region around the multiple sides of the at least one drain region.

A device includes a first channel region and a first gate structure formed over the first channel region. A first source/drain region is adjacent the first channel region and the first source/drain region includes a crystalline structure doped with a first dopant. A first silicide is formed over the first source/drain region. The first source/drain region includes a first concentration of the first dopant between 2.010.sup.21 atoms per centimeter cubed and 4.010.sup.21 atoms per centimeter cubed at a depth of 8 to 10 nanometers. A gradient of decreasing concentration of the first dopant is one decade for every 5.5 to 7.5 nanometers deeper than the first concentration.

A method of forming a semiconductor device that includes forming a fin structure from a bulk semiconductor substrate and forming an isolation region contacting a lower portion of a sidewall of the fin structure, wherein an upper portion of the sidewall of the fin structure is exposed. A sacrificial spacer is formed on the upper portion of the sidewall of the fin structure. The isolation regions are recessed to provide an exposed section of the sidewall of the fin structure. A doped semiconductor material is formed on the exposed section of the lower portion of the sidewall of the fin structure. Dopant is diffused from the doped semiconductor material to a base portion of the fin structure.

The invention provides a method of forming a semiconductor structure, which include: providing an intermediate semiconductor structure having semiconductor substrate, a fin having an EG oxide layer in contact with at least a portion of the fin, and a gate stack disposed over a portion of the fin; forming a silicon nitride layer over portions of the fin that are not located under the gate stack; and after forming the silicon nitride layer, performing one or more ion implantation steps on the intermediate semiconductor structure. The invention also provides a method of forming a semiconductor structure including: providing an intermediate semiconductor structure having a semiconductor substrate, a fin having an EG oxide layer in contact with at least a portion of the fin, and a gate material disposed over the fin; forming, over the fin and gate material of the intermediate semiconductor structure, a gate stack hardmask including an oxide layer; forming a silicon nitride barrier layer on the oxide layer of the gate stack hardmask; performing one or more gate stack hardmask patterning steps; removing the EG oxide layer from portions of the fin that are not located under the gate; and subsequent to removing the EG oxide layer from portions of the fin that are not located under the gate, performing one or more ion implantation steps.

Provided are a semiconductor device and a method of fabricating the same. The method comprises forming an active fin extending along a first direction; forming a field insulating layer exposing an upper part of the active fin, along long sides of the active fin; forming a dummy gate pattern extending along a second direction intersecting the first direction, on the active fin; forming a spacer on at least one side of the dummy gate pattern; forming a liner layer covering the active fin exposed by the spacer and the dummy gate pattern; forming a dopant supply layer containing a dopant element, on the liner layer; and forming a doped region in the active fin along an upper surface of the active fin by heat-treating the dopant supply layer.