Abstract:
Provided are a more stable semiconductor integrated circuit device and a method of manufacturing the same. The method includes providing a semiconductor substrate comprising a first transistor region having a stacked structure of a first gate insulating layer and a first gate and a second transistor region having a stacked structure of a second gate insulating layer and a second gate, forming a blocking layer in the first transistor region, conformally forming a second oxide layer on lateral surfaces of the second gate insulating layer and the second gate and on an exposed surface of the semiconductor substrate by performing oxidation in the second transistor region, removing the blocking layer of the first transistor region, forming a pre-spacer layer on the entire surface of the semiconductor substrate, forming a first spacer by anisotropically etching the pre-spacer layer of the first transistor region and forming a second spacer by anisotropically etching the second oxide layer and the pre-spacer layer of the second transistor region, and forming source/drain regions in the semiconductor substrate to complete a first transistor and a second transistor.
Abstract:
An at least penta-sided-channel type of FinFET transistor may include: a base; a semiconductor body formed on the base, the body being arranged in a long dimension to have source/drain regions sandwiching a channel region, at least the channel, in cross-section transverse to the long dimension, having at least five planar surfaces above the base; a gate insulator on the channel region of the body; and a gate electrode formed on the gate insulator.
Abstract:
Disclosed are embodiments of improved MOSFET and CMOS structures that provides for increased control over short channel effects. Also disclosed are embodiments of associated methods of forming these structures. The embodiments suppress short channel effects by incorporating buried isolation regions into a transistor below source/drain extension regions and between deep source/drain regions and the channel region and, particularly, between deep source/drain regions and the halo regions. Buried isolation regions between the deep source/drain regions and the channel region minimize drain induced barrier lowering (DIBL) as well as punch through. Additionally, because the deep source/drain regions and halo regions are separated by the buried isolation regions, side-wall junction capacitance and junction leakage are also minimized.
Abstract:
In a metal-oxide semiconductor (MOS) transistor with an elevated source/drain structure and in a method of fabricating the MOS transistor with the elevated source/drain structure using a selective epitaxy growth (SEG) process, a source/drain extension junction is formed after an epi-layer is formed, thereby preventing degradation of the source/drain junction region. In addition, the source/drain extension junction is partially overlapped by a lower portion of the gate layer, since two gate spacers are formed and two elevated source/drain layers are formed in accordance with the SEG process. This mitigates the short channel effect and reduces sheet resistance in the source/drain layers and the gate layer.
Abstract:
A multi-layered structure of a semiconducotr device includes a substrate, and a heteroepitaxial layer having a low dislocation defect density on the substrate. The heteroepitaxial layer consists of a main epitaxial layer and at least one intermediate epitaxial layer sandwished in the main epitaxial layer. At their interface, the heteroepitaxial layer, i.e., the bottom portion of the main epitaxial layer, and the substrate have different lattice constants. Also, the intermediate epitaxial layer has a different lattice constant from that of the portions of the main epitaxial layer contiguous to the intermediate epitaxial layer. The intermediate epitaxial layer also has a thickness smaller than the net thickness of the main epitaxial layer such that the intermediate epitaxial layer absorbs the strain in the heteroepitaxial layer. Thus, it is possible to obtain a multi-layered structure comprising an epitaxial layer that is relatively thin and has a low dislocation defect density.
Abstract:
A method of fabricating a trench isolation structure in a high-density semiconductor device that provides an isolation characteristic that is independent of the properties of adjacent MOS transistor devices, wherein a first trench in a first isolation area and a second trench implanted are formed on a semiconductor substrate, a nitrogen (N)-rich silicon layer is formed on the sidewall in a second isolation area, a subsequent oxidation process may be employed to fabricate oxide layers, each having a different thickness, on the sidewall surfaces of the first and second trenches. When the first and second oxide-layered trenches are filled with a stress relief liner and a dielectric material, the different thicknesses of the oxides prevent leakage currents from flowing to an adjacent semiconductor device, regardless of the doping properties of each device.
Abstract:
A method of manufacturing a bipolar device including pre-treatment using germane gas and a bipolar device manufactured by the same. The method includes forming a single crystalline silicon layer for a base region on a collector region; and forming a polysilicon layer for an emitter region thereon. Here, before the polysilicon layer is formed, the single crystalline silicon layer is pre-treated using germane gas. Thus, an oxide layer is removed from the single crystalline silicon layer, and a germanium layer is formed on the single crystalline silicon layer, thus preventing Si-rearrangement.
Abstract:
In a metal-oxide semiconductor (MOS) transistor with an elevated source/drain structure and in a method of fabricating the MOS transistor with the elevated source/drain structure using a selective epitaxy growth (SEG) process, a source/drain extension junction is formed after an epi-layer is formed, thereby preventing degradation of the source/drain junction region. In addition, the source/drain extension junction is partially overlapped by a lower portion of the gate layer, since two gate spacers are formed and two elevated source/drain layers are formed in accordance with the SEG process. This mitigates the short channel effect and reduces sheet resistance in the source/drain layers and the gate layer.
Abstract:
A multi-layered structure of a semiconductor device includes a substrate, and a heteroepitaxial layer having a low dislocation defect density on the substrate. The heteroepitaxial layer consists of a main epitaxial layer and at least one intermediate epitaxial layer sandwished in the main epitaxial layer. At their interface, the heteroepitaxial layer, i.e., the bottom portion of the main epitaxial layer, and the substrate have different lattice constants. Also, the intermediate epitaxial layer has a different lattice constant from that of the portions of the main epitaxial layer contiguous to the intermediate epitaxial layer. The intermediate epitaxial layer also has a thickness smaller than the net thickness of the main epitaxial layer such that the intermediate epitaxial layer absorbs the strain in the heteroepitaxial layer. Thus, it is possible to obtain a multi-layered structure comprising an epitaxial layer that is relatively thin and has a low dislocation defect density.
Abstract:
A method of forming a T-shaped isolation layer, a method of forming an elevated salicide source/drain region using the same, and a semiconductor device having the T-shaped isolation layer are provided. In the method of forming the T-shaped isolation layer, an isolation layer having a narrow trench region in the lower portion thereof and a wide trench region in the upper portion thereof is formed on a semiconductor substrate. Also, in the method of forming the elevated salicide source/drain region, the method of forming the T-shaped isolation layer is used. In particular, conductive impurities can also be implanted into the lower portion of the wide trench region which constitutes the head of the T-shaped isolation layer and is extended to both sides from the upper end of the narrow trench region by controlling the depth of the wide trench region in an ion implantation step for forming the source/drain region.