| Patent application number | Description | Published |
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| 20090032845 | SOI FIELD EFFECT TRANSISTOR HAVING ASYMMETRIC JUNCTION LEAKAGE - A source trench and a drain trench are asymmetrically formed in a top semiconductor layer comprising a first semiconductor in a semiconductor substrate. A second semiconductor material having a narrower band gap than the first semiconductor material is deposited in the source trench and the drain trench to form a source side narrow band gap region and a drain side narrow band gap region, respectively. A gate spacer is formed and source and drain regions are formed in the top semiconductor layer. A portion of the boundary between an extended source region and an extended body region is formed in the source side narrow band gap region. Due to the narrower band gap of the second semiconductor material compared to the band gap of the first semiconductor material, charge formed in the extended body region is discharged through the source and floating body effects are reduced or eliminated. | 02-05-2009 |
| 20090032889 | FIELD EFFECT TRANSISTOR HAVING AN ASYMMETRIC GATE ELECTRODE - The gate electrode of a metal oxide semiconductor field effect transistor (MOSFET) comprises a source side gate electrode and a drain side gate electrode that abut each other near the middle of the channel. In one embodiment, the source side gate electrode comprises a silicon oxide based gate dielectric and the drain side gate electrode comprises a high-k gate dielectric. The source side gate electrode provides high carrier mobility, while the drain side gate electrode provides good short channel effect and reduced gate leakage. In another embodiment, the source gate electrode and drain gate electrode comprises different high-k gate dielectric stacks and different gate conductor materials, wherein the source side gate electrode has a first work function a quarter band gap away from a band gap edge and the drain side gate electrode has a second work function near the band gap edge. | 02-05-2009 |
| 20090073758 | SRAM CELLS WITH ASYMMETRIC FLOATING-BODY PASS-GATE TRANSISTORS - The embodiments of the invention provide SRAM cells with asymmetric floating-body pass-gate transistors. More specifically, a semiconductor device includes an SRAM cell, a first pass-gate transistor, and a second pass-gate transistor. The first pass-gate transistor is connected to a first side of the SRAM cell, wherein the first pass-gate transistor comprises a first drain region and a first source region. The second pass-gate transistor is connected to a second side of the SRAM cell, wherein the second side is opposite the first side. The second pass-gate transistor comprises a second source region and a second drain region. Furthermore, the first source region and/or the second source region comprise a xenon implant. The first drain region and the second drain region each lack a xenon implant. | 03-19-2009 |
| 20090218631 | SRAM CELL HAVING ASYMMETRIC PASS GATES - Conductive stripes laterally abutting the dielectric lines are formed over a thin semiconductor layer on a gate dielectric. Angled halo ion implantation is performed to implant p-type dopants on the side of the drains of pull-down transistors and a first source/drain region of each pass gate transistor. The dielectric lines are removed and the pattern of the conductive stripes is transferred into the semiconductor layer to form gate electrodes. The resulting pass gate transistors are asymmetric transistors have a halo implantation on the side of the first source/drain regions, while the side of a second source/drain regions does not have such a halo implantation. As such, the pass gate transistors provide enhanced readability, writability, and stability. | 09-03-2009 |
| 20090256205 | 2-T SRAM CELL STRUCTURE AND METHOD - The present invention, in one embodiment, provides a memory device including a substrate including at least one device region; a first field effect transistor having a first threshold voltage and a second field effect transistor having a second threshold voltage, the second field effect transistor including a second active region present in the at least one device region of the substrate, the second active region including a second drain and a second source separated by a second channel region, wherein the second channel region includes a second trap that stores holes produced when the first field effect transistor is in the on state, wherein the holes stored in the second trap increase the second threshold voltage to be greater than the first threshold voltage. | 10-15-2009 |
| 20090273040 | HIGH PERFORMANCE SCHOTTKY-BARRIER-SOURCE ASYMMETRIC MOSFETS - The present invention, in one embodiment, provides a semiconductor device including a semiconducting body including a schottky barrier region at a first end of the semiconducting body, a drain dopant region at the second end of the semiconducting body, and a channel positioned between the schottky barrier region and the drain dopant region. The semiconducting device may further include a gate structure overlying the channel of the semiconducting body. Further, a drain contact may be present to the drain dopant region of the semiconducting body, the drain contact being composed of a conductive material and in direct physical contact with a portion of a sidewall of the semiconducting body having a dimension that is less than a thickness of the semiconducting body in which the drain dopant region is positioned. | 11-05-2009 |
| 20090294800 | HYBRID FET INCORPORATING A FINFET AND A PLANAR FET - A stack of a vertical fin and a planar semiconductor portion are formed on a buried insulator layer of a semiconductor-on-insulator substrate. A hybrid field effect transistor (FET) is formed which incorporates a finFET located on the vertical fin and a planar FET located on the planar semiconductor portion. The planar FET enables a continuous spectrum of on-current. The surfaces of the vertical fin and the planar semiconductor portion may be set to coincide with crystallographic orientations. Further, different crystallographic orientations may be selected for the surfaces of the vertical fin and the surfaces of the planar semiconductor portion to tailor the characteristics of the hybrid FET. | 12-03-2009 |
| 20100081239 | Efficient Body Contact Field Effect Transistor with Reduced Body Resistance - A method for forming a body contacted SOI transistor includes forming a semiconductor layer ( | 04-01-2010 |
