Abstract:
PROBLEM TO BE SOLVED: To provide a method of forming a gate electrode that avoids dielectric layer undercut during a silicide precleaning step. SOLUTION: A patterned gate stack includes a gate dielectric below a conductor having vertical sidewalls, and a dielectric layer is formed over the patterned gate stack and substrate surfaces. Nitride spacers are formed overlying the dielectric layer at each vertical sidewall. The dielectric layer on the substrate surface is removed using an etch process such that a portion of the dielectric layer underlying each spacer remains. Then, a nitride layer is deposited over the entire sample and subsequently removed by an etch process such that only a portion of the nitride film ("plug") remains. The plug seals and encapsulates the dielectric layer underlying the each spacer, thus preventing the dielectric material from being undercut during the subsequent silicide precleaning process. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a silicon-on-insulator(SOI) element having both an element which is completely depleted and an element which is partially depleted on a common substrate. SOLUTION: The semiconductor structure which has a continuous buried oxide layer 24 and multiple trench separate structures 33 and 35 and its formation are disclosed. The buried oxide layer is arranged in the substrate at >=2 trench separate structures in depth. The trench separate structures are variable in depth and it is not important whether the trench separate structures are in contact with the buried oxide layer or not. The two trench separate structures enter the substrate to the same or different depths. The trench separate structures provide insulating separation between areas in the substrate and the separated areas may include a semiconductor element. The semiconductor structure makes it easy to provide a digital element and an analog element on a common wafer. The dual-depth buried oxide layer facilitates the formation of an asymmetrical semiconductor structure.
Abstract:
PROBLEM TO BE SOLVED: To provide a trigate field effect transistor provided with a fin-shaped semiconductor body with a channel region and source/drain regions on either side of the channel region. SOLUTION: Thick gate dielectric layers separate the top surface and opposing sidewalls of the channel region from the gate conductor to suppress conductivity in the channel planes. A thin gate dielectric layer separates the upper corners of the channel region from the gate dielectric to optimize conductivity in the channel corners. To further emphasize the electric current in the channel corners, the source/drain regions can be formed only in the upper corners of the semiconductor body. 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. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a device structure of SOI(silicon on isulator) CMOS (complementary metal oxide semiconductor) in which avalanche multiplication of current flowing through a device is increased when an FET(field effect transistor) is turned on and body charges are removed when the FET is turned off. SOLUTION: An FET having an electric floating body is substantially isolated electrically from a substrate. A high resistance path 16 for coupling the floating body is provided at the source. The resistor is operated as a floating body for active switching and a body grounded in waiting mode in order to reduce leakage current. The high resistance path has a resistance of at least 1 MΩ and made of polysilicon. The resistor is formed using a split polysilicon process for opening a hole in a first polysilicon layer in order that an embedded contact mask 19 brings a second polysilicon layer into contact with the substrate.
Abstract:
Disclosed are embodiments of an asymmetric field effect transistor structure (200a-c) and a method of forming the structure in which both series resistance in the source region (204, 304) (Rs) and gate (210, 310) to drain ((205, 305) capacitance (Cgd) are reduced in order to provide optimal performance (i.e., to provide improved drive current with minimal circuit delay) Specifically, different heights (214, 215) of the source (204) and drain regions (205) and/or different distances (351, 352) between the source (304) and drain regions (305) and the gate (210, 310) are tailored to minimize series resistance in the source region (204, 305) (i.e., in order to ensure that series resistance is less than a predetermined resistance value) and in order to simultaneously to minimize gate (210, 310) to drain (205, 305) capacitance (i.e., in order to simultaneously ensure that gate ( 210, 310) to drain (205, 305) capacitance is less than a predetermined capacitance value).
Abstract:
Disclosed herein are embodiments of a multiple fin fin-type field effect transistor (350) (i.e., a multiple fin dual-gate or tri-gate field effect transistor) (300, 300a, 300b) in which the multiple fins arc partially or completely merged by a highly conductive material (360a, 360b) (e.g., a metal suicide). Merging the fins in this manner allow series resistance to be minimized with little, if any, increase in the parasitic capacitance between the gate and source/drain regions (375a-b). Merging the semiconductor fins (350) in this manner also allows each of the source/drain regions (375a-b) to be contacted by a single contact via as well as more flexible placement of that contact via.
Abstract:
A semiconductor device (80,85) including semiconductor material (35,40) having a bend and a trench feature formed at the bend, and a gate structure (45,50) at least partially disposed in the trench feature. A method of fabricating a semiconductor structure including forming a semiconductor material with a trench feature over a layer, forming a gate structure at least partially in the trench feature, and bending the semiconductor material such that stress is induced in the semiconductor material in an inversion channel region of the gate structure.
Abstract:
Disclosed are embodiments of an improved integrated circuit device structure (200) (e.g., a static random access memory array structure or other integrated circuit device structure incorporating both P-type and N-type devices) (121a and 121b) and a method of forming the structure that uses DTI regions (160) for all inter- well and intra- well isolation and, thereby provides a low-cost isolation scheme that avoids FET width variations due to STI-DTI misalignment. Furthermore, because the DTI regions (160) used for intra- well isolation effectively create some floating well sections, (203) which must each be connected to a supply voltage (e.g., Vdd) (280) to prevent threshold voltage (Vt) variations, the disclosed integrated circuit device also includes a shared contact (280) to a junction between the diffusion regions (221 and 222) of adjacent devices (121a and 121b) and an underlying floating well section (205). This shared contact (280) eliminates the cost and area penalties that would be incurred if a discrete supply voltage contact was required for each floating well section (205).
Abstract:
A design structure (100, FIG. 1a) is provided for spacer fill structures (100 and 300) and, more particularly, spacer fill structures (100 and 300), a method of manufacturing and a design structure for reducing device variation is provided. The structure includes a plurality of dummy fill shapes (100) in different areas of a device which are configured such that gate perimeter to gate area ratio will result in a total perimeter density being uniform across a chip.
Abstract:
A method of manufacture and device for a dual-gate CMOS structure. The structure includes a first plate (106a-d) in an insulating layer (100) and a second plate (110a-d) above the insulating layer electrically corresponding to the first plate. An isolation structure (108a-d) is between the first plate and the second plate.