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    • 7. 发明授权
    • Process method to facilitate silicidation
    • 硅化方法
    • US07448395B2
    • 2008-11-11
    • US10894374
    • 2004-07-19
    • Jiong-Ping LuFreidoon MehradLindsey HallVivian LiuClint MontgomeryScott Johnson
    • Jiong-Ping LuFreidoon MehradLindsey HallVivian LiuClint MontgomeryScott Johnson
    • B08B6/00C25F1/00C25F3/30C25F5/00
    • H01L21/28518H01L21/02046H01L21/0206H01L21/28052H01L29/665
    • The present invention substantially removes dry etch residue from a dry plasma etch process 110 prior to depositing a cobalt layer 124 on silicon substrate and/or polysilicon material. Subsequently, one or more annealing processes 128 are performed that cause the cobalt to react with the silicon thereby forming cobalt silicide regions. The lack of dry etch residue remaining between the deposited cobalt and the underlying silicon permits the cobalt silicide regions to be formed substantially uniform with a desired silicide sheet and contact resistance. The dry etch residue is substantially removed by performing a first cleaning operation 112 and then an extended cleaning operation 114 that includes a suitable cleaning solution. The first cleaning operation typically removes some, but not all of the dry etch residue. The extended cleaning operation 114 is performed at a higher temperature and/or for an extended duration and substantially removes dry etch residue remaining after the first cleaning operation 112.
    • 本发明在将钴层124沉积在硅衬底和/或多晶硅材料上之前基本上从干等离子体蚀刻工艺110去除干蚀刻残留物。 随后,进行一个或多个退火工艺128,其使钴与硅反应,从而形成硅化钴区域。 残留在沉积的钴和下面的硅之间的干蚀刻残留物的缺乏允许用期望的硅化物片和接触电阻基本上均匀地形成硅化钴区域。 通过执行第一清洁操作112,然后进行包括合适的清洁溶液的延长清洁操作114,基本上去除了干蚀刻残留物。 第一次清洁操作通常去除一些但不是全部的干蚀刻残留物。 延长的清洁操作114在更高的温度和/或延长的持续时间内进行,并且基本上去除了在第一清洁操作112之后残留的干蚀刻残留物。
    • 9. 发明申请
    • Process method to optimize fully silicided gate (FUSI) thru PAI implant
    • 通过PAI植入物优化完全硅化栅(FUSI)的工艺方法
    • US20080206973A1
    • 2008-08-28
    • US11710769
    • 2007-02-26
    • Frank Scott JohnsonFreidoon MehradJiong-Ping Lu
    • Frank Scott JohnsonFreidoon MehradJiong-Ping Lu
    • H01L21/3205
    • H01L21/26506H01L21/28097H01L29/4975H01L29/665H01L29/6656H01L29/7833
    • An improved method of forming a fully silicided (FUSI) gate in both NMOS and PMOS transistors of the same MOS device is disclosed. In one example, the method comprises forming oxide and nitride etch-stop layers over a top portion of the gates of the NMOS and PMOS transistors, forming a blocking layer over the etch-stop layer, planarizing the blocking layer down to the etch-stop layer over the gates, and removing a portion of the etch-stop layer overlying the gates. The method further includes implanting a preamorphizing species into the exposed gates to amorphize the gates, thereby permitting uniform silicide formation thereafter at substantially the same rates in the NMOS and PMOS transistors. The method may further comprise removing any remaining oxide or blocking layers, forming the gate silicide over the gates to form the FUSI gates, and forming source/drain silicide in moat areas of the NMOS and PMOS transistors.
    • 公开了在相同MOS器件的NMOS和PMOS晶体管中形成完全硅化(FUSI)栅极的改进方法。 在一个示例中,该方法包括在NMOS和PMOS晶体管的栅极的顶部部分上形成氧化物和氮化物蚀刻停止层,在蚀刻停止层上形成阻挡层,将阻挡层平坦化到蚀刻停止 并且去除覆盖在栅极上的蚀刻停止层的一部分。 该方法还包括将预变质物质注入到暴露的栅极中以使栅极非晶化,从而在NMOS和PMOS晶体管中以基本上相同的速率允许均匀的硅化物形成。 该方法还可以包括去除任何剩余的氧化物或阻挡层,在栅极上形成栅极硅化物以形成FUSI栅极,以及在NMOS和PMOS晶体管的护环区域中形成源极/漏极硅化物。