摘要:
The present invention discloses a semiconductor device, which comprises a substrate, a gate stack structure on the substrate, a channel region in the substrate under the gate stack structure, and source and drain regions at both sides of the channel region, wherein there is a stressed layer under and at both sides of the channel region, in which the source and drain regions are formed. According to the semiconductor device and the method for manufacturing the same of the present invention, a stressed layer is formed at both sides of and under the channel region made of a silicon-based material so as to act on the channel region, thereby effectively increasing the carrier mobility of the channel region and improving the device performance.
摘要:
A method for manufacturing a dual metal CMOS device comprising: forming a first type metal work function modulation layer in the first gate trench and the second gate trench; forming a second type work function metal diffusion source layer in the first gate trench and the second gate trench; forming a heat isolation layer that shields the region of the first type device; and thermally annealing the regions where the first type device and the second type device are located.
摘要:
The present invention discloses a semiconductor device, comprising substrates, a plurality of gate stack structures on the substrate, a plurality of gate spacer structures on both sides of each gate stack structure, a plurality of source and drain regions in the substrate on both sides of each gate spacer structure, the plurality of gate spacer structures comprising a plurality of first gate stack structures and a plurality of second gate stack structures, wherein each of the first gate stack structures comprises a first gate insulating layer, a first work function metal layer, a second work function metal diffusion blocking layer, and a gate filling layer; Each of the second gate stack structures comprises a second gate insulating layer, a first work function metal layer, a second work function metal layer, and a gate filling layer, characterized in that the first work function metal layer has a first stress, and the gate filling layer has a second stress. Two metal gate layers of different types and/or intensity of stress are formed, respectively, thus different stresses are applied to the channel regions of different MOSFETs effectively and accurately, the device carrier mobility is enhanced simply and efficiently, and the device performance is also enhanced.
摘要:
A semiconductor device, which comprises: a semiconductor substrate; a channel region on the semiconductor substrate, said channel region including a quantum well structure; a source region and a drain region on the sides of the channel region; a gate structure on the channel region; wherein the materials for the channel region, the source region and the drain region have different energy bands, and a tunneling barrier structure exists between the source region and the channel region.
摘要:
A method for forming titanium nitride by PVD is disclosed, comprising: generating ions of a noble gas by glow discharge under a vacuum condition that a nitrogen gas and the noble gas are supplied; nitriding a surface of a wafer and a surface of a titanium target with the nitrogen gas; bombarding the surface of the titanium target with the ions of the noble gas after they are accelerated in an electric field so that titanium ions and titanium nitride are sputtered; and forming a titanium nitride layer by depositing titanium nitride on the surface of the wafer in a magnetic field, while titanium ions are injected into the surface of the wafer so that stress is introduced into the titanium nitride layer, wherein non-crystallization fraction of the titanium nitride layer and stress in the titanium nitride layer are increased by increasing kinetic energy of titanium ions which are injected into the surface of the wafer. In the method for forming titanium nitride by PVD according to the present disclosure, kinetic energy of titanium ions which are injected into the surface of the wafer is increased by controlling process parameters so that non-crystallization fraction of the titanium nitride layer and stress in the titanium nitride layer are increased.
摘要:
The present invention discloses a semiconductor device, which comprises a substrate, a buffer layer on the substrate, an inversely doped isolation layer on the buffer layer, a barrier layer on the inversely doped isolation layer, a channel layer on the barrier layer, a gate stack structure on the channel layer, and source and drain regions at both sides of the gate stack structure, characterized in that the buffer layer and/or the barrier layer and/or the inversely doped isolation layer are formed of SiGe alloys or SiGeSn alloys, and the channel layer is formed of a GeSn alloy. The semiconductor device according to the present invention uses a quantum well structure of SiGe/GeSn/SiGe to restrict transportation of carriers, and it introduces a stress through lattice mis-match to greatly increase the carrier mobility, thus improving the device driving capability so as to be adapted to high-speed and high-frequency application.
摘要:
The present invention discloses a semiconductor device, comprising a plurality of fins located on a substrate and extending along a first direction; a plurality of gate stack structures extending along a second direction and across each of the fins; a plurality of stress layers located in the fins on both sides of the gate stack structures and having a plurality of source and drain regions therein; a plurality of channel regions located between the plurality of source and drain regions along a first direction; characterized in that the plurality of gate stack structures enclose the plurality of channel regions. In accordance with the semiconductor device and the method of manufacturing the same of the present invention, an all-around nanowire metal multi-gate is formed in self-alignment by punching through and etching the fins at which the channel regions are located using a combination of the hard mask and the dummy gate, thus the device performance is enhanced.
摘要:
The present application discloses a method for manufacturing a semiconductor structure, comprises the following steps: providing a substrate and forming a gate stack on the substrate; forming an offset spacer surround the gate stack and a dummy spacer surround the offset spacer; forming the S/D region on both sides of the dummy spacer; removing the dummy spacer and portions of the offset spacer on the surface of the substrate; forming a doped spacer on the sidewall of the offset spacer; forming the S/D extension region by allowing the dopants in doped spacer into the substrate; removing the doped spacer. Accordingly, the present application also discloses a semiconductor structure. In the present disclosure the S/D extension region with high doping concentration and shallow junction depth is formed by the formation of a heavily doped doped spacer, which can be removed in the subsequent procedures, in order to efficiently improve the performance of the semiconductor structure.
摘要:
A method for manufacturing a multigate device is provided, comprising: providing a semiconductor substrate; etching the semiconductor substrate to form a protruding fin; etching the semiconductor substrate at the bottom of the fin so as to form a gap between the fin and the semiconductor substrate; forming a dielectric layer which covers the semiconductor substrate and the fin and fills the gap; and etching the dielectric layer so as to expose the top and a portion of sidewalls of the fin. The present invention can realize isolation between fins with a simple process, which costs relatively low and is suitable for massive industrial application.
摘要:
The present invention relates to a MOS device and method of manufacturing the same. The device comprises a semiconductor substrate; a channel formed in the semiconductor substrate; a gate stack formed on the channel and a spacer surrounding the gate stack; and source and drain regions formed in the substrates on both sides of the spacer; wherein the gate stack is comprised of an insulating layer and a multi-layer metal gate formed thereon, the multi-layer metal gate is comprised of a strained metal layer for introducing a stress to the channel and a work function regulating layer for regulating the work function of the metal gate, and the work function regulating layer surrounds the strained metal layer from the bottom and sides. The multi-layer metal gate structure overcomes the defect incurred by the fact that a conventional strained metal gate material can not achieve both regulation of work function and effect of application of strain be optimized at the same time.