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    • 55. 发明申请
    • Structures and methods for forming a locally strained transistor
    • 用于形成局部应变晶体管的结构和方法
    • US20060234455A1
    • 2006-10-19
    • US11109279
    • 2005-04-19
    • Chien-Hao ChenTze-Liang Lee
    • Chien-Hao ChenTze-Liang Lee
    • H01L21/00
    • H01L21/26513H01L21/26506H01L21/2658H01L29/165H01L29/6659H01L29/7833H01L29/7843H01L29/7848
    • Embodiments of the invention provide structures and methods for forming a strained MOS transistor. A preferred embodiment includes creating a compressive strain in a PMOS transistor for improving carrier mobility without the need for source/drain recess formation and SiGe epitaxy. Embodiments comprise forming a gate electrode on a silicon substrate, and forming a lightly doped source/drain (LDS/LDD) region in the substrate by simultaneously implanting germanium and boron in the substrate using the gate electrode as a mask. Embodiments further comprise forming spacers on opposite sidewalls of the gate electrode and forming a heavily doped source/drain region in the substrate by simultaneously implanting germanium and boron using the gate electrode and the spacers as a mask. Embodiments may further include annealing the semiconductor device to recrystallize SiGe.
    • 本发明的实施例提供了用于形成应变MOS晶体管的结构和方法。 优选实施例包括在PMOS晶体管中产生压缩应变以改善载流子迁移率,而不需要源/漏凹陷形成和SiGe外延。 实施例包括在硅衬底上形成栅电极,并且通过使用栅极电极作为掩模,在衬底中同时注入锗和硼,从而在衬底中形成轻掺杂的源极/漏极(LDS / LDD)区域。 实施例还包括在栅电极的相对侧壁上形成间隔物,并通过使用栅极电极和间隔物作为掩模同时注入锗和硼,从而在衬底中形成重掺杂的源/漏区。 实施例还可以包括退火半导体器件以重结晶SiGe。
    • 59. 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。