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    • 6. 发明申请
    • LDMOS WITH IMPROVED BREAKDOWN VOLTAGE
    • LDMOS具有改进的断电电压
    • US20120228695A1
    • 2012-09-13
    • US13046313
    • 2011-03-11
    • Eng Huat TohJae Gon LeeChung Foong TanElgin Quek
    • Eng Huat TohJae Gon LeeChung Foong TanElgin Quek
    • H01L29/772H01L21/336
    • H01L29/7816H01L29/402H01L29/42368H01L29/495H01L29/4983H01L29/512H01L29/513H01L29/517H01L29/518H01L29/66545H01L29/66681
    • An LDMOS is formed with a field plate over the n− drift region, coplanar with the gate stack, and having a higher work function than the gate stack. Embodiments include forming a first conductivity type well, having a source, surrounded by a second conductivity type well, having a drain, in a substrate, forming first and second coplanar gate stacks on the substrate over a portion of the first well and a portion of the second well, respectively, and tuning the work functions of the first and second gate stacks to obtain a higher work function for the second gate stack. Other embodiments include forming the first gate stack of a high-k metal gate and the second gate stack of a field plate on a gate oxide layer, forming the first and second gate stacks with different gate electrode materials on a common gate oxide, and forming the gate stacks separated from each other and with different gate dielectric materials.
    • LDMOS在n-漂移区上形成有与栅叠层共面的场板,并且具有比栅叠层更高的功函数。 实施例包括形成第一导电类型的阱,具有由第二导电类型阱包围的源,在衬底中具有漏极,在衬底上在第一阱的一部分上形成第一和第二共面栅叠层, 分别调整第一和第二栅极堆叠的功函数,以获得第二栅极堆叠的较高功函数。 其他实施例包括在栅极氧化物层上形成高k金属栅极的第一栅极堆叠和场板的第二栅极堆叠,在公共栅极氧化物上形成具有不同栅电极材料的第一和第二栅极堆叠,以及形成 栅极堆叠彼此分离并具有不同的栅极电介质材料。
    • 10. 发明申请
    • METHODS FOR NORMALIZING STRAIN IN A SEMICONDUCTOR DEVICE
    • 用于在半导体器件中正常化应变的方法
    • US20090246920A1
    • 2009-10-01
    • US12057072
    • 2008-03-27
    • Lee Wee TeoChung Foong TanAlain ChanElgin Kiok Boone Quek
    • Lee Wee TeoChung Foong TanAlain ChanElgin Kiok Boone Quek
    • H01L21/8232
    • H01L21/823807H01L21/823814H01L21/823864H01L29/7848
    • The electrical performance enhancing effects of inducing strain in semiconductor devices is made substantially uniform across a substrate having a varying population density of device components by selectively spacing apart the strain-inducing structures from the effected regions of the semiconductor devices depending upon the population density of device components. Differing separation distances are obtained by selectively forming sidewall spacers on device components, such as MOS transistor gate electrodes, in which the sidewall spacers have a relatively small width in regions having a relatively high density of device components, and a relatively larger width in regions having a relatively low density of device components. By varying the separation distance of strain-inducing structures from the effected components, uniform electrical performance is obtained in the various components of the devices in an integrated circuit regardless of the component population density.
    • 通过根据器件的种群密度选择性地将应变诱导结构与半导体器件的受影响区域分离开,使得在半导体器件中诱导应变的电性能增强效应通过具有变化的器件部件的种群密度的衬底基本上均匀 组件。 通过在诸如MOS晶体管栅电极的器件部件上选择性地形成侧壁间隔而获得不同的间隔距离,其中侧壁间隔物在具有相对较高密度的器件部件的区域中具有相对较小的宽度,并且具有 相对低密度的器件组件。 通过改变应变诱导结构与受影响部件的分离距离,在集成电路中的器件的各种部件中获得均匀的电性能,而不管部件群体密度如何。