摘要:
An eFuse begins with a single crystal silicon-on-insulator (SOI) structure that has a single crystal silicon layer on a first insulator layer. The single crystal silicon layer is patterned into a strip. Before or after the patterning, the single crystal silicon layer is doped with one or more impurities. At least an upper portion of the single crystal silicon layer is then silicided to form a silicided strip. In one embodiment the entire single crystal silicon strip is silicided to create a silicide strip. Second insulator(s) is/are formed on the silicide strip, so as to isolate the silicided strip from surrounding structures. Before or after forming the second insulators, the method forms electrical contacts through the second insulators to ends of the silicided strip. By utilizing a single crystal silicon strip, any form of semiconductor, such as a diode, conductor, insulator, transistor, etc. can form the underlying portion of the fuse structure. The overlying silicide material allows the fuse to act as a conductor in its unprogrammed state. However, contrary to metal or polysilicon based eFuses which only comprise an insulator in the programmed state, when the inventive eFuse is programmed (and the silicide is moved or broken) the underlying semiconductor structure operates as an active semiconductor device.
摘要:
The present invention relates to a programmable semiconductor device, preferably a FinFET or tri-gate structure, that contains a first contact element, a second contact element, and at least one fin-shaped fusible link region coupled between the first and second contact elements. The second contact element is laterally spaced apart from the first contact element, and the fin-shaped fusible link region has a vertically notched section. A programming current flowing through the fin-shaped fusible link region causes either significant resistance increase or formation of an electric discontinuity in the vertically notched section. Alternatively, the vertically notched section may contain a dielectric material, and application of a programming voltage between a gate electrode overlaying the vertically notched section and one of the contact elements breaks down the dielectric material and allows current flow between the gate electrode and the fin-shaped fusible link region.
摘要:
A fin-type field effect transistor has an insulator layer above a substrate and a fin extending above the insulator layer. The fin has a channel region, and source and drain regions. A gate conductor is positioned over the channel region. The insulator layer includes a heat dissipating structural feature adjacent the fin, and a portion of the gate conductor contacts the heat dissipating structural feature. The heat dissipating structural feature can comprise a recess within the insulator layer or a thermal conductor extending through the insulator layer.
摘要:
Disclosed is a structure and method for producing a fin-type field effect transistor (FinFET) that has a buried oxide layer over a substrate, at least one first fin structure and at least one second fin structure positioned on the buried oxide layer. First spacers are adjacent the first fin structure and second spacers are adjacent the second fin structure. The first spacers cover a larger portion of the first fin structure when compared to the portion of the second fin structure covered by the second spacers. Those fins that have larger spacers will receive a smaller area of semiconductor doping and those fins that have smaller spacers will receive a larger area of semiconductor doping. Therefore, there is a difference in doping between the first fins and the second fins that is caused by the differently sized spacers. The difference in doping between the first fins and the second fins changes an effective width of the second fins when compared to the first fins.
摘要:
Accordingly, the present invention provides a double gated transistor and a method for forming the same that results in improved device performance and density. The preferred embodiment of the present invention uses provides a double gated transistor with asymmetric gate doping, where one of the double gates is doped degenerately n-type and the other degenerately p-type. By doping on of the gates n-type, and the other p-type, the threshold voltage of the resulting device is improved. In particular, by asymmetrically doping the two gates, the resulting transistor can, with adequate doping of the body, have a threshold voltage in a range that enables low-voltage CMOS operation. For example, a transistor can be created that has a threshold voltage between 0V and 0.5V for nFETs and between 0 and −0.5V for pFETs.
摘要:
A method for forming a transistor. A semiconductor substrate is provided. The semiconductor substrate is patterned to provide a first body edge. A first gate structure of a first fermi level is provided adjacent the first body edge. The semiconductor substrate is patterned to provide a second body edge. The first and second body edges of the semiconductor substrate define a transistor body. A second gate structure of a second fermi level is provided adjacent the second body edge. A substantially uniform dopant concentration density is formed throughout the transistor body.
摘要:
A complementary metal oxide semiconductor (CMOS) structure includes a semiconductor substrate having first mesa having a first ratio of channel effective horizontal surface area to channel effective vertical surface area. The CMOS structure also includes a second mesa having a second ratio of the same surface areas that is greater than the first ratio. A first device having a first polarity uses the first mesa as a channel and benefits from the enhanced vertical crystallographic orientation. A second device having a second polarity different from the first polarity uses the second mesa as a channel and benefits from the enhanced horizontal crystallographic orientation.
摘要:
A fin-type field effect transistor has an insulator layer above a substrate and a fin extending above the insulator layer. The fin has a channel region, and source and drain regions. A gate conductor is positioned over the channel region. The insulator layer includes a heat dissipating structural feature adjacent the fin, and a portion of the gate conductor contacts the heat dissipating structural feature. The heat dissipating structural feature can comprise a recess within the insulator layer or a thermal conductor extending through the insulator layer.
摘要:
A planar substrate device integrated with fin field effect transistors (FinFETs) and a method of manufacture comprises a silicon-on-insulator (SOI) wafer comprising a substrate; a buried insulator layer over the substrate; and a semiconductor layer over the buried insulator layer. The structure further comprises a FinFET over the buried insulator layer and a field effect transistor (FET) integrated in the substrate, wherein the FET gate is planar to the FinFET gate. The structure further comprises retrograde well regions configured in the substrate. In one embodiment, the structure further comprises a shallow trench isolation region configured in the substrate.
摘要:
A FinFET structure and method of forming a FinFET device. The method includes: (a) providing a semiconductor substrate, (b) forming a dielectric layer on a top surface of the substrate; (c) forming a silicon fin on a top surface of the dielectric layer; (d) forming a protective layer on at least one sidewall of the fin; and (e) removing the protective layer from the at least one sidewall in a channel region of the fin. In a second embodiment, the protective layer is converted to a protective spacer.