摘要:
Systems and methods for modifying features of a semiconductor device. The systems and methods of the invention modify features of a semiconductor device according to the amount of exposure dose of light to which a common reticle field of a semiconductor device is exposed. A mask, or a thin film provided on a mask, having sub-resolutions provided thereon determines the amount of exposure dose to which various parts of the reticle field is exposed during the exposure. As a result, different features within the same reticle field can exhibit different dimensions even though exposed to the same exposure dose.
摘要:
Disclosed are embodiments of a trigate field effect transistor that comprises a fin-shaped semiconductor body with a channel region and source/drain regions on either side of the channel region. Thick gate dielectric layers separate the top surface and opposing sidewalls of the channel region from the gate conductor in order to suppress conductivity in the channel planes. A thin gate dielectric layer separates the upper corners of the channel region from the gate conductor in order to optimize conductivity in the channel corners. To further emphasize the current flow in the channel corners, the source/drain regions can be formed in the upper corners of the semiconductor body alone. Alternatively, source/drain extension regions can be formed only in the upper corners of the semiconductor body adjacent to the gate conductor and deep source/drain diffusion regions can be formed in the ends of the semiconductor body.
摘要:
A semiconductor structure and the associated method for fabricating the same. The semiconductor structure includes (a) a semiconductor substrate, (b) a back gate region on the semiconductor substrate, (c) a back gate dielectric region on the back gate region, (d) a semiconductor region on the back gate dielectric region comprising a channel region disposed between first and second source/drain (S/D) regions, (e) a main gate dielectric region on the semiconductor region, (f) a main gate region on the main gate dielectric region, (g) a first contact pad adjacent to the first S/D region and electrically insulated from the back gate region, and (h) a first buried dielectric region that physically and electrically isolates the first contact pad and the back gate region, and wherein the first buried dielectric region has a first thickness in the first direction at least 1.5 times a second thickness of the back gate region.
摘要:
Disclosed are embodiments of a structure that comprises a first device, having multiple FETs, and a second device, having at least one FET. Sections of a first portion of a semiconductor layer below the first device are doped and contacted to form back gates. A second portion of the semiconductor layer below the second device remains un-doped and un-contacted and, thus, functions as an insulator. Despite the performance degradation of the first device due to back gate capacitance, the back gates result in a net gain for devices such as, SRAM cells, which require precise Vt control. Contrarily, despite marginal Vt control in the second device due to the absence of back gates, the lack of capacitance loading and the added insulation result in a net gain for high performance devices such as, logic circuits.
摘要:
Disclosed are planar and non-planar field effect transistor (FET) structures and methods of forming the structures. The structures comprise segmented active devices (e.g., multiple semiconductor fins for a non-planar transistor or multiple semiconductor layer sections for a planar transistor) connected at opposite ends to source/drain bridges. A gate electrode is patterned on the segmented active devices between the source/drain bridges such that it has a reduced length between the segments (i.e., between the semiconductor fins or sections). Source/drain contacts land on the source/drain bridges such that they are opposite only those portions of the gate electrode with the reduced gate length. These FET structures can be configured to simultaneously maximize the density of the transistor, minimize leakage power and maintain the parasitic capacitance between the source/drain contacts and the gate conductor below a preset level, depending upon the performance and density requirements.
摘要:
Disclosed is a semiconductor structure and associated method of performing the structure with good performance and stability trade-offs for digital circuits and SRAM cells and/or analog FETs on the same chip. Specifically, a dual-strain layer is formed over digital circuits and the other devices on a chip. The dual-strain layer comprises tensile sections above digital logic n-type transistors, compressive sections above digital logic p-type transistors and additional tensile sections above SRAM cells and/or analog FETs. An amorphization ion-implant is performed to relax the strain over SRAM cell p-FETs and, thereby, eliminate variability and avoid p-FET performance degradation in the SRAM cells. Additionally, this ion-implant can relax the strain above both analog p-FETs and n-FETs and, thereby, eliminate variability and the coupling of the logic device process to the analog FETs and provide more predictable and well-controlled analog FETs.
摘要:
A CMOS device comprising a FinFET comprises at least one fin structure comprising a source region; a drain region; and a channel region comprising silicon separating the source region from the drain region. The FinFET further comprises a gate region over the source region and the drain region and partitioning the fin structure into a first side and a second side, wherein the channel region is in mechanical compression on the first side and in mechanical tension on the second side. The FinFET may comprise any of a nFET and a pFET, wherein the nFET comprises a N-channel inversion region in the second side, and wherein the pFET comprises a P-channel inversion region in the second side. The CMOS device may further comprise a tensile film and a relaxed film on opposite sides of the fin structure, and an oxide cap layer over the fin structure.
摘要:
An integrated circuit structure has a buried oxide (BOX) layer above a substrate, and a first-type fin-type field effect transistor (FinFET) and a second-type FinFET above the BOX layer. The second region of the BOX layer includes a seed opening to the substrate. The top of the first-type FinFET and the second-type FinFET are planar with each other. A first region of the BOX layer below the first FinFET fin is thicker above the substrate when compared to a second region of the BOX layer below the second FinFET fin. Also, the second FinFET fin is taller than the first FinFET fin. The height difference between the first fin and the second fin permits the first-type FinFET to have the same drive strength as the second-type FinFET.
摘要:
A field effect transistor and method of fabricating the field effect transistor. The field effect transistor, including: a gate electrode formed on a top surface of a gate dielectric layer, the gate dielectric layer on a top surface of a single-crystal silicon channel region, the single-crystal silicon channel region on a top surface of a Ge including layer, the Ge including layer on a top surface of a single-crystal silicon substrate, the Ge including layer between a first dielectric layer and a second dielectric layer on the top surface of the single-crystal silicon substrate.
摘要:
Disclosed is a multiple-gate transistor that includes a channel region and source and drain regions at ends of the channel region. A gate oxide is positioned between a logic gate and the channel region and a first insulator is formed between a floating gate and the channel region. The first insulator is thicker than the gate oxide. The floating gate is electrically insulated from other structures. Also, a second insulator is positioned between a programming gate and the floating gate. Voltage in the logic gate causes the transistor to switch on and off, while stored charge in the floating gate adjusts the threshold voltage of the transistor. The transistor can comprise a fin-type field effect transistor (FinFET), where the channel region comprises the middle portion of a fin structure and the source and drain regions comprise end portions of the fin structure.