Abstract: The present disclosure provides a gas sensor. The gas sensor includes a substrate, an insulating layer over the substrate, a conductor layer over and in contact with a top surface of the substrate, and a gas sensing film. The conductor layer includes a conductive pattern having a plurality of openings, and the conductive pattern is embedded in the insulating layer. The gas sensing film is formed over a portion of the conductive pattern.

Abstract: A fin field effect transistor (FinFET) device structure and method for forming FinFET device structure are provided. The FinFET structure includes a substrate and an isolation structure formed on the substrate. The FinFET structure also includes a fin structure extending above the substrate, and the fin structure is embedded in the isolation structure. The FinFET structure further includes an epitaxial structure formed on the fin structure, the epitaxial structure has a pentagon-like shape, and an interface between the epitaxial structure and the fin structure is lower than a top surface of the isolation structure.

Abstract: A fin field effect transistor (FinFET) device structure and method for forming FinFET device structure are provided. The FinFET structure includes a substrate and an isolation structure formed on the substrate. The FinFET structure also includes a fin structure extending above the substrate, and the fin structure is embedded in the isolation structure. The FinFET structure further includes an epitaxial structure formed on the fin structure, the epitaxial structure has a pentagon-like shape, and an interface between the epitaxial structure and the fin structure is lower than a top surface of the isolation structure.

Abstract: A semiconductor device includes a Fin FET device. The Fin FET device includes a first fin structure extending in a first direction and protruding from an isolation insulating layer, a first gate stack including a first gate electrode layer and a first gate dielectric layer, covering a portion of the first fin structure and extending in a second direction perpendicular to the first direction, and a first source and a first drain, each including a first stressor layer disposed over the first fin structure. The first fin structure and the isolation insulating layer are disposed over a substrate. A height Ha of an interface between the first fin structure and the first stressor layer measured from the substrate is greater than a height Hb of a lowest height of the isolation insulating layer measured from the substrate.

Abstract: In some embodiments, a field effect transistor (FET) structure comprises a body structure, dielectric structures, a gate structure and a source or drain region. The gate structure is formed over the body structure. The source or drain region is embedded in the body structure beside the gate structure, and abuts and is extended beyond the dielectric structure. The source or drain region contains stressor material with a lattice constant different from that of the body structure. The source or drain region comprises a first region formed above a first level at a top of the dielectric structures and a second region that comprises downward tapered side walls formed under the first level and abutting the corresponding dielectric structures.

Abstract: Structures and formation methods of a semiconductor device structure are provided. The semiconductor device structure includes a semiconductor substrate and a gate electrode over the semiconductor substrate. The semiconductor device structure also includes a source/drain structure adjacent to the gate electrode. The semiconductor device structure further includes a spacer element over a sidewall of the gate electrode, and the spacer element has an upper portion having a first exterior surface and a lower portion having a second exterior surface. Lateral distances between the first exterior surface and the sidewall of the gate electrode are substantially the same. Lateral distances between the second exterior surface and the sidewall of the gate electrode increase along a direction from a top of the lower portion towards the semiconductor substrate.

Abstract: A semiconductor device includes a semiconductor substrate, a plurality of semiconductor fins, a gate stack and an epitaxy structure. The semiconductor fins are present on the semiconductor substrate. The semiconductor fins respectively include recesses therein. The gate stack is present on portions of the semiconductor fins that are adjacent to the recesses. The epitaxy structure is present across the recesses of the semiconductor fins. The epitaxy structure includes a plurality of corners and at least one groove present between the corners, and the groove has a curvature radius greater than that of at least one of the corners.

Abstract: In some embodiments, a field effect transistor (FET) structure comprises a body structure, dielectric structures, a gate structure and a source or drain region. The gate structure is formed over the body structure. The source or drain region is embedded in the body structure beside the gate structure, and abuts and is extended beyond the dielectric structure. The source or drain region contains stressor material with a lattice constant different from that of the body structure. The source or drain region comprises a first region formed above a first level at a top of the dielectric structures and a second region that comprises downward tapered side walls formed under the first level and abutting the corresponding dielectric structures.

Abstract: In some embodiments, a field effect transistor (FET) structure comprises a body structure, dielectric structures, a gate structure and a source or drain region. The gate structure is formed over the body structure. The source or drain region is embedded in the body structure beside the gate structure, and abuts and is extended beyond the dielectric structure. The source or drain region contains stressor material with a lattice constant different from that of the body structure. The source or drain region comprises a first region formed above a first level at a top of the dielectric structures and a second region that comprises downward tapered side walls formed under the first level and abutting the corresponding dielectric structures.

Abstract: In a method for manufacturing a semiconductor device, a fin structure is formed over a substrate, an isolation insulating layer is formed over the substrate such that an upper portion of the fin structure protrudes from the isolation insulating layer, a first dielectric layer is formed on the upper portion of the fin structure, a cover layer is formed on the first dielectric layer, the cover layer is partially removed from an upper part of the upper portion of the fin structure with the first dielectric layer, the first dielectric layer is removed from the upper part of the upper portion of the fin structure, a second dielectric layer is formed on the upper part of the upper portion of the fin structure, and a gate electrode is formed on the second dielectric layer and the first dielectric layer disposed on an lower part of the upper portion of the fin structure.

Abstract: In a method for manufacturing a semiconductor device, a fin structure is formed over a substrate, an isolation insulating layer is formed over the substrate such that an upper portion of the fin structure protrudes from the isolation insulating layer, a first dielectric layer is formed on the upper portion of the fin structure, a cover layer is formed on the first dielectric layer, the cover layer is partially removed from an upper part of the upper portion of the fin structure with the first dielectric layer, the first dielectric layer is removed from the upper part of the upper portion of the fin structure, a second dielectric layer is formed on the upper part of the upper portion of the fin structure, and a gate electrode is formed on the second dielectric layer and the first dielectric layer disposed on an lower part of the upper portion of the fin structure.

Abstract: A semiconductor structure and a method of fabricating the semiconductor structure are provided. The semiconductor structure includes a substrate; a metal gate structure on the substrate; and a spacer next to the metal gate structure having a skirting part extending into the metal gate structure and contacting the substrate. The metal gate structure includes a high-k dielectric layer and a metal gate electrode on the high-k dielectric layer.

Abstract: A fin field effect transistor (FinFET) device structure and method for forming FinFET device structure are provided. The FinFET structure includes a substrate and a fin structure extending above the substrate. The FinFET structure includes an epitaxial structure formed on the fin structure, and the epitaxial structure has a first height. The FinFET structure also includes fin sidewall spacers formed adjacent to the epitaxial structure. The sidewall spacers have a second height and the first height is greater than the second height, and the fin sidewall spacers are configured to control a volume and the first height of the epitaxial structure.

Abstract: A semiconductor device includes a Fin FET device. The Fin FET device includes a first fin structure extending in a first direction and protruding from an isolation insulating layer, a first gate stack including a first gate electrode layer and a first gate dielectric layer, covering a portion of the first fin structure and extending in a second direction perpendicular to the first direction, and a first source and a first drain, each including a first stressor layer disposed over the first fin structure. The first fin structure and the isolation insulating layer are disposed over a substrate. A height Ha of an interface between the first fin structure and the first stressor layer measured from the substrate is greater than a height Hb of a lowest height of the isolation insulating layer measured from the substrate.

Abstract: A dry etching apparatus includes a process chamber, a stage, a gas supply device and a plasma generating device. The stage is in the process chamber and is configured to support a wafer, wherein the wafer has a center region and a periphery region surrounding the center region. The gas supply device is configured to supply a first flow of an etching gas to the center region and supply a second flow of the etching gas to the periphery region. The plasma generating device is configured to generate plasma from the etching gas.

Abstract: A semiconductor device includes a semiconductor substrate, a plurality of semiconductor fins, a gate stack and an epitaxy structure. The semiconductor fins are present on the semiconductor substrate. The semiconductor fins respectively include recesses therein. The gate stack is present on portions of the semiconductor fins that are adjacent to the recesses. The epitaxy structure is present across the recesses of the semiconductor fins. The epitaxy structure includes a plurality of corners and at least one groove present between the corners, and the groove has a curvature radius greater than that of at least one of the corners.

Abstract: A semiconductor device includes a Fin FET device. The Fin FET device includes a first fin structure extending in a first direction and protruding from an isolation insulating layer, a first gate stack including a first gate electrode layer and a first gate dielectric layer, covering a portion of the first fin structure and extending in a second direction perpendicular to the first direction, and a first source and a first drain, each including a first stressor layer disposed over the first fin structure. The first fin structure and the isolation insulating layer are disposed over a substrate. A height Ha of an interface between the first fin structure and the first stressor layer measured from the substrate is greater than a height Hb of a lowest height of the isolation insulating layer measured from the substrate.

Abstract: A semiconductor device includes a substrate, at least one source drain feature, a gate structure, and at least one gate spacer. The source/drain feature is present at least partially in the substrate. The gate structure is present on the substrate. The gate spacer is present on at least one sidewall of the gate structure. At least a bottom portion of the gate spacer has a plurality of dopants therein.

Abstract: A semiconductor device includes a semiconductor substrate, a plurality of semiconductor fins, a gate stack and an epitaxy structure. The semiconductor fins are present on the semiconductor substrate. The semiconductor fins respectively include recesses therein. The gate stack is present on portions of the semiconductor fins that are adjacent to the recesses. The epitaxy structure is present across the recesses of the semiconductor fins. The epitaxy structure includes a plurality of corners and at least one groove present between the corners, and the groove has a curvature radius greater than that of at least one of the corners.

Abstract: In a method for manufacturing a semiconductor device, a fin structure is formed over a substrate, an isolation insulating layer is formed over the substrate such that an upper portion of the fin structure protrudes from the isolation insulating layer, a first dielectric layer is formed on the upper portion of the fin structure, a cover layer is formed on the first dielectric layer, the cover layer is partially removed from an upper part of the upper portion of the fin structure with the first dielectric layer, the first dielectric layer is removed from the upper part of the upper portion of the fin structure, a second dielectric layer is formed on the upper part of the upper portion of the fin structure, and a gate electrode is formed on the second dielectric layer and the first dielectric layer disposed on an lower part of the upper portion of the fin structure.