Abstract:
A method of forming a semiconductor device that embeds an L-shaped spacer is provided. The method includes defining an L-shaped spacer on each side of a gate region of a substrate and embedding the L-shaped spacers in an oxide layer so that the oxide layer extends over a portion of the substrate a predetermined distance from a lateral edge of the L-shaped spacer. And removing oxide layers to expose the L-shape spacers.
Abstract:
A method for providing a dual stress memory technique in a semiconductor device including an nFET and a PFET and a related structure are disclosed. One embodiment of the method includes forming a tensile stress layer over the nFET and a compressive stress layer over the pFET, annealing to memorize stress in the semiconductor device and removing the stress layers. The compressive stress layer may include a high stress silicon nitride deposited using a high density plasma (HDP) deposition method. The annealing step may include using a temperature of approximately 400-1200° C. The high stress compressive silicon nitride and/or the anneal temperatures ensure that the compressive stress memorization is retained in the pFET.
Abstract:
The present invention relates to enhancing MOSFET performance with the corner stresses of STI. A method of manufacturing a MOS device comprises the steps of: providing a semiconductor substrate; forming trenches on the semiconductor substrate and at least a pMOS region and at least an nMOS region surrounded by the trenches; filling the trenches with a dielectric material having a stress; removing at least the dielectric material having a stress in the trenches which is adjacent to a position where a channel is to be formed on each of the pMOS and nMOS regions so as to form exposed regions; filling the exposed regions with a insulating material; and forming pMOS and nMOS devices on the pMOS region and the nMOS region, respectively, wherein each of the pMOS and nMOS devices comprises a channel, a gate formed above the channel, and a source and a drain formed at both sides of the channel; wherein in a channel length direction, the boundary of each exposed region is substantially aligned with the boundary of the position of the channel, or the boundary of each exposed region extends along the channel length direction to be aligned with the boundary of corresponding pMOS or nMOS region.
Abstract:
Technologies are generally described for providing solar device or LED device structures and methods for manufacturing the same, which may allow for making ultra-thin semiconductor plate devices with flexible contact arrangements at the meantime of maintaining or improving performance of solar devices, improving the utility of the semiconductor plate material, and increasing the fabrication through-put and yield of the solar and LED devices.
Abstract:
The present disclosure provides a semiconductor device and a method for manufacturing the same. The semiconductor device comprises: an SOI wafer comprising a semiconductor substrate, a buried insulation layer, and a semiconductor layer, wherein the buried insulation layer is disposed on the semiconductor substrate, and the semiconductor layer is disposed on the buried insulation layer; a plurality of MOSFETs being formed adjacently to each other in the SOI wafer, wherein each of the MOSFETs comprises a respective backgate being formed in the semiconductor substrate; and a plurality of shallow trench isolations, each of which being formed between respective adjacent MOSFETs to isolate the respective adjacent MOSFETs from each other, wherein the respective adjacent MOSFETs share a common backgate isolation region under and in direct contact with the respective backgate in the semiconductor substrate, and a PNP junction or an NPN junction is formed by the common backgate isolation region and the respective backgate of the respective adjacent MOSFETs. According to the present disclosure, respective backgates of two adjacent MOSFETs are isolated from each other by the shallow trench isolation. Furthermore, the two adjacent MOSFETs are also isolated from each other by the PNP or NPN junction formed by the respective backgates of the two adjacent MOSFETs and the common backgate isolation. As a result, this device structure has a better insulation effect over the prior art MOSFET and it greatly reduces the possibility of breakthrough.
Abstract:
The present application discloses a non-volatile memory device, comprising a semiconductor fin on an insulating layer; a channel region at a central portion of the semiconductor fin; source/drain regions on both sides of the semiconductor fin; a floating gate arranged at a first side of the semiconductor fin and extending in a direction further away from the semiconductor fin; and a first control gate arranged on top of the floating gate or covering top and sidewall portions of the floating gate. The non-volatile memory device reduces a short channel effect, has an increased memory density, and is cost effective.
Abstract:
The present application discloses a MOSFET and a method for manufacturing the same. The MOSFET is formed on an SOI wafer, comprising: a shallow trench isolation for defining an active region in the semiconductor layer; a gate stack on the semiconductor layer; a source region and a drain region in the semiconductor layer on both sides of the gate stack; a channel region in the semiconductor layer and sandwiched by the source region and the drain region; a back gate in the semiconductor substrate; a first dummy gate stack overlapping with a boundary between the semiconductor layer and the shallow trench isolation; and a second dummy gate stack on the shallow trench isolation, wherein the MOSFET further comprises a plurality of conductive vias which are disposed between the gate stack and the first dummy gate stack and electrically connected to the source region and the drain region respectively, and between the first dummy gate stack and the second dummy gate stack and electrically connected to the back gate. The MOSFET avoids short circuit between the back gate and the source/drain regions by the dummy gate stacks.
Abstract:
A semiconductor structure and a method for forming the same are provided. The structure comprises a semiconductor substrate (100) with an nMOSFET region (102) and a pMOSFET region (104) on it. An nMOSFET structure and a pMOSFET structure are formed in the nMOSFET region (102) and the pMOSFET region (104), respectively. The nMOSFET structure comprises a first channel region (182) formed in the nMOSFET region (102) and a first gate stack formed in the first channel region (182). The nMOSFET structure is covered with a compressive-stressed material layer (130) to apply a tensile stress to the first channel region (182). The pMOSFET structure comprises a second channel region (184) formed in the pMOSFET region (104) and a second gate stack formed in the second channel region (184). The pMOSFET structure is covered with a tensile-stressed material layer (140) to apply a compressive stress to the second channel region (184).
Abstract:
Vertical stacks of a metal portion and a semiconductor portion formed on a first substrate are brought into physical contact with vertical stacks of a metal portion and a semiconductor portion formed on a second substrate. Alternately, vertical stacks of a metal portion and a semiconductor portion formed on a first substrate are brought into physical contact with metal portions formed on a second substrate. The assembly of the first and second substrates is subjected to an anneal at a temperature that induces formation of a metal semiconductor alloy derived from the semiconductor portions and the metal portions. The first substrate and the second substrate are bonded through metal semiconductor alloy portions that adhere to the first and second substrates.
Abstract:
A well region formation method and a semiconductor base in the field of semiconductor technology are provided. A method comprises: forming isolation regions in a semiconductor substrate to isolate active regions; selecting at least one of the active regions, and forming a first well region in the selected active region; forming a mask to cover the selected active region, and etching the rest of the active regions, so as to form grooves; and growing a semiconductor material by epitaxy to fill the grooves. Another method comprises: forming isolation regions in a semiconductor substrate for isolating active regions; forming well regions in the active regions; etching the active regions to form grooves, such that the grooves have a depth less than or equal to a depth of the well regions; and growing a semiconductor material by epitaxy to fill the grooves.