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    • 2. 发明授权
    • Method of forming a fully-depleted SOI ( silicon-on-insulator) MOSFET having a thinned channel region
    • 形成具有稀疏沟道区的完全耗尽的SOI(绝缘体上硅)MOSFET的方法
    • US06660598B2
    • 2003-12-09
    • US10084550
    • 2002-02-26
    • Hussein I. HanafiDiane C. BoydKevin K. ChanWesley NatzleLeathen Shi
    • Hussein I. HanafiDiane C. BoydKevin K. ChanWesley NatzleLeathen Shi
    • H01L21336
    • H01L29/78696H01L29/66545H01L29/66772H01L29/78612
    • A sub-0.05 &mgr;m channel length fully-depleted SOI MOSFET device having low source and drain resistance and minimal overlap capacitance and a method of fabricating the same are provided. In accordance with the method of the present invention, at least one dummy gate region is first formed atop an SOI layer. The dummy gate region includes at least a sacrificial polysilicon region and first nitride spacers located on sidewalls of the sacrificial polysilicon region. Next, an oxide layer that is coplanar with an upper surface of the dummy gate region is formed and then the sacrificial polysilicon region is removed to expose a portion of the SOI layer. A thinned device channel region is formed in the exposed portion of the SOI layer and thereafter inner nitride spacers are formed on exposed walls of the fist nitride spacers. Next, a gate region is formed over the thinned device channel region and then the oxide layer is removed so as to expose thicker portions of the SOI layer than de device channel region.
    • 提供了具有低源极和漏极电阻以及最小重叠电容的0.05微米通道长度的全耗尽SOI MOSFET器件及其制造方法。 根据本发明的方法,首先在SOI层顶部形成至少一个虚拟栅极区域。 虚拟栅极区域至少包括牺牲多晶硅区域和位于牺牲多晶硅区域的侧壁上的第一氮化物间隔物。 接下来,形成与伪栅极区的上表面共面的氧化物层,然后除去牺牲多晶硅区域,以露出SOI层的一部分。 在SOI层的暴露部分中形成一个变薄的器件沟道区,此后在第一氮化物间隔物的暴露的壁上形成内部氮化物间隔物。 接下来,在减薄的器件沟道区上形成栅极区,然后除去氧化物层,以便暴露出SOI层的比较器件沟道区更厚的部分。
    • 6. 发明授权
    • Strained silicon-channel MOSFET using a damascene gate process
    • 应变硅沟道MOSFET使用镶嵌栅极工艺
    • US06916694B2
    • 2005-07-12
    • US10650400
    • 2003-08-28
    • Hussein I. HanafiDavid J. FrankKevin K. Chan
    • Hussein I. HanafiDavid J. FrankKevin K. Chan
    • H01L21/336H01L21/84
    • H01L29/66545H01L29/665H01L29/66537H01L29/7842Y10S438/938
    • The present invention provides a method using a damascene-gate process to improve the transport properties of FETs through strain Si. Changes in mobility and FET characteristics are deliberately made in a Si or silicon-on-insulator (SOI) structure through the introduction of local strain in the channel region, without introducing strain in the device source and drain regions. The method has the advantage of not straining the source and drain regions resulting in very low leakage junctions and also it does not require any special substrate preparation like the case of a strained Si/relaxed SiGe system. Moreover, the method is compatible with existing mainstream CMOS processing. The present invention also provides a CMOS device that has a localized strained Si channel that is formed using the method of the present invention.
    • 本发明提供了一种使用镶嵌栅极工艺来改善FET通过应变Si的传输特性的方法。 迁移率和FET特性的变化是通过在沟道区域中引入局部应变而在Si或绝缘体上硅(SOI)结构中作出的,而不会在器件源极和漏极区域引入应变。 该方法的优点是不会使源极和漏极区域产生非常低的泄漏接头,并且也不需要像应变Si /弛豫SiGe系统那样的任何特殊的衬底制备。 此外,该方法与现有的主流CMOS处理兼容。 本发明还提供一种CMOS器件,其具有使用本发明的方法形成的局部应变Si沟道。