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    • 4. 发明授权
    • Method to reduce contact resistance on thin silicon-on-insulator device
    • 降低绝缘体上硅器件接触电阻的方法
    • US07479437B2
    • 2009-01-20
    • US11413010
    • 2006-04-28
    • Brian J GreeneLouis Lu-Chen HsuJack Allan MandelmanChun-Yung Sung
    • Brian J GreeneLouis Lu-Chen HsuJack Allan MandelmanChun-Yung Sung
    • H01L21/336
    • H01L29/458H01L29/66628H01L29/66772
    • A method of reducing contact resistance on a silicon-on-insulator includes exposing sidewalls and a portion of a top surface of a source/drain region of the device, forming a porous silicon layer within a surface of the source/drain region, implanting dopants in the source/drain region, and forming a silicide layer over the source/drain region. The porous silicon layer is formed by forming a layer of p+ doping on the exposed sidewalls and portion of the top surface of the source/drain region, forming a nitride liner over the device, including the source/drain region and the layer of p+ doping, forming a planarized resist over the nitride liner, recessing the planarized resist and etching the nitride liner to expose portions of the source/drain region, and forming the porous silicon layer on the exposed portions of the source drain region.
    • 降低绝缘体上硅的接触电阻的方法包括暴露该器件源极/漏极区的侧壁和一部分上表面,在源/漏区的表面内形成多孔硅层,注入掺杂剂 在源极/漏极区域中,并且在源极/漏极区域上形成硅化物层。 通过在暴露的源极/漏极区域的顶表面的侧壁和部分上形成p +掺杂层形成多孔硅层,在器件上形成氮化物衬垫,包括源/漏区和p +掺杂层 在所述氮化物衬垫上形成平坦化的抗蚀剂,使所述平坦化抗蚀剂凹陷并蚀刻所述氮化物衬垫以暴露所述源/漏区的部分,以及在所述源漏区的所述暴露部分上形成所述多孔硅层。