Abstract:
PROBLEM TO BE SOLVED: To fabricate a MOS transistor that improves electric characteristics by avoiding formation of an interface layer with a gate electrode layer. SOLUTION: The MOS transistor includes a gate electrode, a channel region having a top surface of a gate electrode base, and a dielectric stack 37 interposed between the gate electrode and the top surface of the channel region. The dielectric stack comprises a high-k dielectric layer 31 comprising at least a high-k material, a dielectric layer comprising at least silicon and nitrogen, and an intermediate layer disposed between the high-k dielectric layer and the dielectric layer. The intermediate layer includes the high-k material, silicon, and nitrogen. The gate electrode is made of polysilicon or polysilicon germanium. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide methods for producing SiGe-on-insulator structures and for forming strain-relaxed SiGe layers on silicon while minimizing defects.SOLUTION: Amorphous SiGe layers 600 are deposited on at least one monolayer of a dopant by CVD from trisilane and GeH. The amorphous SiGe layers 600 are recrystallized over silicon by melt or solid phase epitaxy (SPE) processes. The melt processes preferably also cause diffusion of germanium to dilute the overall germanium content and essentially consume silicon 500 overlying an insulator. The SPE process can be conducted with or without diffusion of germanium into the underlying silicon 500, and so is applicable to SOI as well as conventional semiconductor substrates.
Abstract:
PROBLEM TO BE SOLVED: To provide an atomic layer deposition (ALD) thin film deposition apparatus in which the amount of remaining reaction substance is small during a purging period succeeding to a reaction substance pulse.SOLUTION: The apparatus is configured to deposit a thin film on a wafer mounted within a space defined in a deposition chamber and includes a gas inlet that is in communication with the space, a sealing portion 604 that includes a sealing surface 605, the deposition chamber and a susceptor 602. The susceptor 602 is configured to support the wafer within the space. The susceptor 602 is configured to move vertically with respect to the deposition chamber between a first position in which the susceptor 602 seals against the sealing surface 605 and a second, lower position in which the susceptor 602 no longer seals against the sealing surface 605. In the first position, a vertical distance between the interface between the sealing surface 605 and the susceptor 602 and the top face of the wafer positioned on the susceptor 602 is less than about 2 millimeters.
Abstract:
PROBLEM TO BE SOLVED: To provide a highly thermally stable metal silicide, and to provide method that utilizing the metal silicide in semiconductor processing. SOLUTION: A metal silicide 34a is, preferably, a nickel silicide formed by the reaction of nickel with substitutionally carbon-doped single-crystal silicon which has about 2 atomic% or higher of substitutional carbon. Contrary to expectation, the metal silicide 34a is stable to temperatures of about 900°C and higher, and its sheet resistance is substantially unaffected by exposure to high temperatures. The metal silicide is compatible with subsequent high-temperature processing steps, including reflow annealing of BPSG 42. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a method of forming a gradient film containing SiGe. SOLUTION: A step of preparing a substrate arranged in a CVD chamber, and a step of depositing a gradient film containing SiGe on the substrate by thermal CVD using a deposition gas which contains a predetermined amount of trisilane and a germanium precursor and makes the predetermined amount change while deposition are included. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a fastener for screwing a lamp inside a semiconductor processing reactor with easy screw exchanges but with a screw not inadvertently coming off. SOLUTION: The fastener 38 of a captured type capable of attaching a lamp inside a radiantly heated semiconductor processing reactor, is captured within an eyelet terminal 32 on each end of the lamp, thereby rotatably securing the fastener 38 to the lamp. The eyelet terminal 32 may have a threaded aperture which screws into a threaded part of the fastener 38. Alternatively, the terminal may be adapted with a tab, a conductor extension or a housing assembly which fold over the top of a fastener inserted through the terminal. In another embodiment, the terminal may be adapted with notched projections which engage a circular dovetail in the fastener inserted through the terminal. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a deposition method of electrically active doped Si-containing crystalline films. SOLUTION: The method of manufacturing the Si-containing films that contain relatively high levels of group III or group V dopants involves chemical vapor deposition using trisilane and a dopant precursor. Extremely high levels of substitutional incorporation may be obtained, including crystalline silicon films that contain at least about 3×10 20 atoms cm -3 of an electrically active dopant. Substitutionally doped Si-containing films may be selectively deposited onto the crystalline surfaces of mixed substrates by introducing an etchant gas during deposition. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a method of depositing highly uniform Si or SiGe over the surface of a substrate.SOLUTION: In a chemical vapor deposition process, a chemical precursor that enables thin films to be deposited in or near a limited conveyance area is utilized. By this process, it is possible to produce a film both higher in deposition velocity and more uniform in composition and thickness than a film prepared by using a conventional chemical precursor. In a preferable embodiment, Si-containing thin films useful to the semiconductor industry for various purposes including transistor gate electrodes can be deposited by using trisilane.