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    • 31. 发明申请
    • Method of forming a locally strained transistor
    • 形成局部应变晶体管的方法
    • US20060246672A1
    • 2006-11-02
    • US11119522
    • 2005-04-29
    • Chien-Hao ChenDonald ChaoTze-Liang Lee
    • Chien-Hao ChenDonald ChaoTze-Liang Lee
    • H01L21/336H01L29/94H01L27/108H01L29/76H01L31/119
    • H01L29/78H01L29/7843
    • A preferred embodiment of the invention provides a semiconductor fabrication method. An embodiment comprises forming a MOS device having sidewall spacers. A highly stressed layer is deposited over the device. The stress is selectively adjusted in that portion of the layer over the gate electrode and the sidewall spacers. Preferably, the stress layer over the gate electrode and over the sidewall spacers is adjusted from a first stress to a second stress, wherein the first stress is one of tensile and compressive, and the second stress is the other of tensile and compressive. Preferred embodiments selectively induce a suitable stress within PMOS and NMOS channel regions for improving their respective carrier mobility. Still other embodiments of the invention comprise a field effect transistor (FET) having a overlying stressed layer, the stressed layer being comprised of different stress regions.
    • 本发明的优选实施例提供半导体制造方法。 一个实施例包括形成具有侧壁间隔物的MOS器件。 高应力层沉积在器件上。 在栅极电极和侧壁间隔物上的层的该部分中选择性地调节应力。 优选地,栅极上方和侧壁间隔物上的应力层从第一应力调整到第二应力,其中第一应力是拉伸和压缩之一,第二应力是拉伸和压缩中的另一个。 优选实施例在PMOS和NMOS沟道区域内选择性地诱发适当的应力,以改善它们各自的载流子迁移率。 本发明的其它实施例包括具有上覆应力层的场效应晶体管(FET),所述应力层由不同的应力区域组成。
    • 37. 发明授权
    • Strained transistor with hybrid-strain inducing layer
    • 具有杂化应变诱导层的应变晶体管
    • US07164163B2
    • 2007-01-16
    • US11062723
    • 2005-02-22
    • Chien-Hao ChenTze-Liang Lee
    • Chien-Hao ChenTze-Liang Lee
    • H01L29/76
    • H01L29/4983H01L29/66628H01L29/66636H01L29/7843
    • A semiconductor device having a hybrid-strained layer and a method of forming the same are discussed. The semiconductor device comprises: a gate dielectric over a substrate; a gate electrode over the gate dielectric; an optional pair of spacers along the sidewalls of the gate dielectric and the gate electrode; a source/drain region substantially aligned with an edge of the gate electrode; and a strained layer over the source/drain region, gate electrode, and spacers wherein the strained layer has a first portion and a second portion. The first portion of the strained layer is substantially over the source/drain region and has a first inherent strain. The second portion of the strained layer has at least a portion substantially over the gate electrode and the spacers and has a second inherent strain of the opposite type of the first strain.
    • 讨论了具有混合应变层的半导体器件及其形成方法。 半导体器件包括:衬底上的栅极电介质; 位于栅极电介质上的栅电极; 沿着栅极电介质和栅电极的侧壁的可选的一对间隔物; 源极/漏极区域,其基本上与栅电极的边缘对齐; 以及源极/漏极区域上的应变层,栅电极和间隔物,其中应变层具有第一部分和第二部分。 应变层的第一部分基本上在源极/漏极区域之上并且具有第一固有应变。 应变层的第二部分具有基本上在栅电极和间隔物上的至少一部分,并且具有相反类型的第一应变的第二固有应变。