Abstract:
PROBLEM TO BE SOLVED: To form fully silicided dual gates on fins of a FinFET device by correctly controlling a thickness of remaining polysilicon gates using a CMP method. SOLUTION: A method for forming a fully silicided gate on the each fin of a FinFET device includes steps of: pattern-forming a gate stack consisting of a polysilicon layer and a polysilicon germanium layer on the each fin; removing the polysilicon germanium layer on one of the fins; forming a metal layer on the each fin; and forming the fully silicided gate on the each fin of the FinFET by annealing the FinFET device. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a CMOS device having a semiconductor substrate region of a plurality of crystal orientations, a CMOS structure, and a method of manufacturing such a CMOS device and a CMOS structure. SOLUTION: The CMOS structure includes a first device arranged using a first active region in a semiconductor substrate. The first active region is flat and has a first crystal orientation. The CMOS structure also includes a second device arranged using a second active region in the semiconductor substrate. The second active region is in a three-dimensional shape and has a second crystal orientation in which the first crystal orientation does not exist. The first and second crystal orientations can optimize performance in the first and second devices regarding charge carrier mobility typically. The second active region in a three-dimensional shape also has a uniform thickness. The CMOS structure can be manufactured by crystallographically specific etchant for forming the second active region in a three-dimensional shape. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a structure applying mechanical stress in a CMOS structure for improving device performance and the yield of chips, and a method therefor. SOLUTION: The invention relates to a CMOS structure and a method for manufacturing the CMOS structure, in which a first stressed layer arranged on a first transistor and a second stressed layer on a second transistor are contacted but are not overlapped to each other. With such contact that is not overlapped, flexibility in manufacturing is improved when forming the contact to a silicide layer on a source/a drain region in one of the first and the second transistor. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a structure having the superposition of stressed layers bringing a compressive stress into the channel of a p-type MOSFET device and a tensile stress into the channel of an n-type MOSFET device on each gate stack and including the p-type MOSFET device and the n-type MOSFET device that are adjacent, and to provide a method of manufacturing the same. SOLUTION: One of a p-type MOSFET device or an n-type MOSFET device has a height shorter than that of the other adjacent device, and the boundary of the shorter device of the two devices is defined by a discontinuity, i.e. an opening part in the stressed layers superposed on the shorter device. In a preferable method for forming the device, a single stressed layer is formed on the gate stack having different heights for forming a first type stress in the substrate under the gate stack. An opening part is formed in the stressed layer at a distance from the shorter gate stack, so that a second type stress is formed under the shorter gate stack. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a semiconductor structure having improved practicality, and a method for fabricating the semiconductor structure. SOLUTION: The semiconductor structure and its method for fabrication include a first surface semiconductor layer of a first crystallographic orientation located upon a dielectric surface of a substrate. Located laterally separated upon the dielectric surface from the first surface semiconductor layer is a stack layer. The stack layer includes a buried semiconductor layer located nearer the dielectric surface, and a second surface semiconductor layer of a second crystallographic orientation different from the first crystallographic orientation located over and not contacting the buried semiconductor layer. The semiconductor structure provides a pair of semiconductor surface regions of different crystallographic orientation. A particular embodiment may be fabricated utilizing a sequential laminating, patterning, selective stripping and selective epitaxial deposition method. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
Methods of stressing a channel of a transistor with a replaced gate and related structures are disclosed. A method may include providing an intrinsically stressed material over the transistor including a gate thereof; removing a portion of the intrinsically stressed material over the gate; removing at least a portion of the gate, allowing stress retained by the gate to be transferred to the channel; replacing (or refilling) the gate with a replacement gate; and removing the intrinsically stressed material. Removing and replacing the gate allows stress retained by the original gate to be transferred to the channel, with the replacement gate maintaining (memorizing) that situation. The methods do not damage the gate dielectric. A structure may include a transistor having a channel including a first stress that is one of a compressive and tensile and a gate including a second stress that is the other of compressive and tensile.
Abstract:
Methods of stressing a channel of a transistor with a replaced gate and related structures are disclosed. A method may include providing an intrinsically stressed material (130) over the transistor (102A, 102B) including a gate (110) thereof; removing a portion of the intrinsically stressed material (130) over the gate (110); removing at least a portion of the gate (110), allowing stress retained by the gate (110) to be transferred to the channel; replacing (or refilling) the gate (110) with a replacement gate (160); and removing the intrinsically stressed material. Removing and replacing the gate (110) allows stress retained by the original gate (110) to be transferred to the channel, with the replacement gate (160) maintaining (memorizing) that situation. The methods do not damage the gate dielectric. A structure may include a transistor having a channel including a first stress that is one of a compressive and tensile and a gate including a second stress that is the other of compressive and tensile.
Abstract:
Embodiments herein present a structure, method, etc. for making high density MOSFET circuits with different height contact lines. The MOSFET circuits include a contact line, a first gate layer situated proximate the contact line, and at least one subsequent gate layer situated over the first gate layer. The contact line includes a height that is less than a combined height of the first gate layer and the subsequent gate layer(s). The MOSFET circuits further include gate spacers situated proximate the gate layers and a single contact line spacer situated proximate the contact line. The gate spacers are taller and thicker than the contact line spacer.
Abstract:
There is provided a method of manufacturing a field effect transistor (FET) (100) that includes the steps of forming a gate structure (175) on a semiconductor substrate (105), and forming a recess (160) in the substrate and embedding a second semiconductor material (165) in the recess. The gate structure includes a gate dielectric layer (115), conductive layers (120, 130) and an insulating layer (125). Forming said gate structure includes a step of recessing the conductive layer (130) in the gate structure, and the steps of recessing the conductive layer and forming the recess (160) in the substrate are performed in a single step. There is also provided a FET device.
Abstract:
The present invention provides a strained-Si structure, in which the nFET regions of the structure are strained in tension and the pFET regions of the structure are strained in compression. Broadly the strained-Si structure comprises a substrate; a first layered stack atop the substrate, the first layered stack comprising a compressive dielectric layer atop the substrate and a first semiconducting layer atop the compressive dielectric layer, wherein the compressive dielectric layer transfers tensile stresses to the first semiconducting layer; and a second layered stack atop the substrate, the second layered stack comprising an tensile dielectric layer atop the substrate and a second semiconducting layer atop the tensile dielectric layer, wherein the tensile dielectric layer transfers compressive stresses to the second semiconducting layer. The tensile dielectric layer and the compressive dielectric layer preferably comprise nitride, such as Si 3 N 4 .