Abstract:
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.
Abstract:
A method and structure for an integrated circuit structure that utilizes complementary fin-type field effect transistors (FinFETs) is disclosed. The invention has a first-type of FinFET which includes a first fin (100), and a second-type of FinFET which includes a second fin (102) running parallel to the first fin (100). The invention also has an insulator fin positioned between the source/drain regions (130) of the first first-type of FinFET and the second-type of FinFET. The insulator fin has approximately the same width dimensions as the first fin (100) and the second fin (102), such that the spacing between the first-type of FinFET and the second-type of FinFET is approximately equal to the width of one fin. The invention also has a common gate (106) formed over channel regions of the first-type of FinFET and the second-type of FinFET. The gate (106) includes a first impurity doping region adjacent the first-type of FinFET and a second impurity doping region adjacent the second-type of FinFET. The differences between the first impurity doping region and the second impurity doping region provide the gate with different work functions related to differences between the first-type of FinFET and the second-type of FinFET. The first fin (100) and the second fin (102) have approximately the same width.
Abstract:
A design structure is provided for spacer fill structures and, more particularly, spacer fill structures, a method of manufacturing and a design structure for reducing device variation is provided. The structure includes a plurality of dummy fill shapes 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:
An integrated circuit semiconductor memory device (100) has a first dielectric layer (116) characterized as the BOX layer absent from a portion (130) of the substrate (112) under the gate of a storage transistor to increase the gate-to-substrate capacitance and thereby reduce the soft error rate. A second dielectric layer (132) having a property different from the first dielectric layer at least partly covers that portion (130) of the substrate. The device may be a FinFET device including a fin (122) and a gate dielectric layer (124, 126) between the gate and the fin, with the second dielectric layer having less leakage than the gate dielectric layer.
Abstract:
PROBLEM TO BE SOLVED: To provide a method and a structure for avoiding a floating body effect in an SOI structure. SOLUTION: A semiconductor device includes SOI FETs which include silicon bodies on an insulating layer on a conductive substrate. Gate dielectrics and gates are formed on the surfaces of the silicon bodies, and sources and drains are formed on two sides of the gates. Buried body contacts to substrate conductors are formed under the third side of the gate. The buried body contacts do not extend to the upper face of the silicon bodies. The buried body contacts are separated from the gates by second dielectrics whose thicknesses are generally larger than the thicknesses of the first gate dielectrics. The buried body contacts are plugs made of conductive materials, and the second dielectrics cover the body contacts under the gates. The FETs can be used in a SRAM circuit or any other type of circuit having the silicon on insulator(SOI) structure.
Abstract:
PROBLEM TO BE SOLVED: To provide a method to generate a FinFET with a back gate, which has dielectric layers whose thicknesses are different on its front gate side and back gate side. SOLUTION: Several steps are included to introduce impurities into at least one side of a fin of a FinFET to enable formation of dielectric layers with different thicknesses. Impurities that can be introduced through implantation may enhance or retard dielectric formation. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide an apparatus for biasing ultra-low voltage logic circuits. SOLUTION: An integrated circuit device includes multiple transistors and a global body bias circuit. The global body bias circuit includes a first transistor and second transistors connected in series between a power supply and second power supply or ground. The gate and source of the first transistor are connected to the second power supply. The drains and bodies of the first and second transistors are connected to form an output connected to the bodies of the other transistors within the integrated circuit device. COPYRIGHT: (C)2003,JPO
Abstract:
A method is provided for fabricating a finFET device. Fin structures are formed over a BOX layer. The fin structures include a semiconductor layer and extend in a first direction. A gate stack is formed on the BOX layer over the fin structures and extending in a second direction. The gate stack includes a high-K dielectric layer and a metal gate. Gate spacers are formed on sidewalls of the gate stack, and an epi layer is deposited to merge the fin structures. Ions are implanted to form source and drain regions, and dummy spacers are formed on sidewalls of the gate spacers. The dummy spacers are used as a mask to recess or completely remove an exposed portion of the epi layer. Silicidation forms silicide regions that abut the source and drain regions and each include a vertical portion located on the vertical sidewall of the source or drain region.