Abstract:
A process for fabricating a fin-type field effect transistor (FinFET) structure is described. A semiconductor substrate is patterned to form a fin. A spacer is formed on the sidewall of the fin. A portion of the fin is removed, such that the spacer and the surface of the remaining fin together define a cavity. A piece of a semiconductor compound is formed from the cavity, wherein the upper portion of the piece of the semiconductor compound laterally extends over the spacer.
Abstract:
A method for fabricating semiconductor device is disclosed. The method includes the steps of: providing a substrate having a fin-shaped structure thereon and shallow trench isolation (STI) around the fin-shaped structure; forming a gate line across the fin-shaped structure and on the STI; performing a first cutting process to remove the part of the gate line directly above the fin-shaped structure and the fin-shaped structure directly under the gate line; and performing a second cutting process to remove part of the gate line on the STI.
Abstract:
A complementary metal oxide semiconductor field-effect transistor (MOSFET) includes a substrate, a first MOSFET and a second MOSFET. The first MOSFET is disposed on the substrate within a first transistor region and the second MOSFET is disposed on the substrate within a second transistor region. The first MOSFET includes a first fin structure, two first lightly-doped regions, two first doped regions and a first gate structure. The first fin structure includes a first body portion and two first epitaxial portions, wherein each of the first epitaxial portions is disposed on each side of the first body portion. A first vertical interface is between the first body portion and each of the first epitaxial portions so that the first-lightly doped region is able to be uniformly distributed on an entire surface of each first vertical interface.
Abstract:
A method for fabricating semiconductor device is disclosed. First, a substrate is provided, and a first mandrel, a second mandrel, a third mandrel, and a fourth mandrel are formed on the substrate. Preferably, the first mandrel and the second mandrel include a first gap therebetween, the second mandrel and the third mandrel include a second gap therebetween, and the third mandrel and the fourth mandrel include a third gap therebetween, in which the first gap is equivalent to the third gap but different from the second gap. Next, spacers are formed adjacent to the first mandrel, the second mandrel, the third mandrel, and the fourth mandrel, and the spacers in the first gap and the third gap are removed.
Abstract:
The present invention provides a semiconductor structure including a substrate, at least one fin group and a plurality of sub-fin structures disposed on the substrate, wherein the fin group is disposed between two sub-fin structures, and a top surface of each sub-fin structure is lower than a top surface of the fin group; and a shallow trench isolation (STI) disposed in the substrate, wherein the sub-fin structures are completely covered by the shallow trench isolation.
Abstract:
A semiconductor device includes a fin structure, an isolation structure, a gate structure and an epitaxial structure. The fin structure protrudes from the surface of the substrate and includes a top surface and two sidewalls. The isolation structure surrounds the fin structure. The gate structure overlays the top surface and the two sidewalls of a portion of the fin structure, and covers a portion of the isolation structure. The isolation structure under the gate structure has a first top surface, and the isolation structure at two sides of the gate structure has a second top surface. The first top surface is higher than the second top surface. The epitaxial layer is disposed at one side of the gate structure and is in direct contact with the fin structure.
Abstract:
A method for fabricating metal gate transistor is disclosed. The method includes the steps of: providing a substrate having a NMOS region and a PMOS region; forming a dummy gate on each of the NMOS region and the PMOS region respectively; removing the dummy gates from each of the NMOS region and the PMOS region; forming a n-type work function layer on the NMOS region and the PMOS region; removing the n-type work function layer in the PMOS region; forming a p-type work function layer on the NMOS region and the PMOS region; and depositing a low resistance metal layer on the p-type work function layer of the NMOS region and the PMOS region.
Abstract:
A fin-shaped field-effect transistor process includes the following steps. A substrate is provided. A first fin-shaped field-effect transistor and a second fin-shaped field-effect transistor are formed on the substrate, wherein the first fin-shaped field-effect transistor includes a first metal layer and the second fin-shaped field-effect transistor includes a second metal layer. A treatment process is performed on the first fin-shaped field-effect transistor to adjust the threshold voltage of the first fin-shaped field-effect transistor. A fin-shaped field-effect transistor formed by said process is also provided.
Abstract:
A method for manufacturing a semiconductor device is provided. A first stack structure and a second stack structure are formed to respectively cover a portion of a first fin structure and a second fin structure. Subsequently, a spacer is respectively formed on the sidewalls of the fin structures through an atomic layer deposition process and the composition of the spacers includes silicon carbon nitride. Afterwards, a interlayer dielectric is formed and etched so as to expose the hard mask layers. A mask layer is formed to cover the second stack structure and a portion of the dielectric layer. Later, the hard mask layer in the first stack structure is removed under the coverage of the mask layer. Then, a dummy layer in the first stack structure is replaced with a conductive layer.
Abstract:
A method for manufacturing semiconductor structures includes providing a substrate having a plurality of mandrel patterns and a plurality of dummy patterns, simultaneously forming a plurality of first spacers on sidewalls of the mandrel patterns and a plurality of second spacers on sidewalls of the dummy patterns, and removing the second spacers and the mandrel patterns to form a plurality of spacer patterns on the substrate.