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    • 160. 发明申请
    • METAL GATE CMOS WITH AT LEAST A SINGLE GATE METAL AND DUAL GATE DIELECTRICS
    • 金属门CMOS至少具有单栅极金属和双栅电极
    • US20090011552A1
    • 2009-01-08
    • US12210703
    • 2008-09-15
    • Bruce B. DorisYoung-Hee KimBarry P. LinderVijay NarayananVamsi K. Paruchuri
    • Bruce B. DorisYoung-Hee KimBarry P. LinderVijay NarayananVamsi K. Paruchuri
    • H01L21/8238
    • H01L21/823857H01L21/823878H01L21/84
    • A complementary metal oxide semiconductor (CMOS) structure including at least one nFET and at least one pFET located on a surface of a semiconductor substrate is provided. In accordance with the present invention, the nFET and the pFET both include at least a single gate metal and the nFET gate stack is engineered to have a gate dielectric stack having no net negative charge and the pFET gate stack is engineered to have a gate dielectric stack having no net positive charge. In particularly, the present invention provides a CMOS structure in which the nFET gate stack is engineered to include a band edge workfunction and the pFET gate stack is engineered to have a ¼ gap workfunction. In one embodiment of the present invention, the first gate dielectric stack includes a first high k dielectric and an alkaline earth metal-containing layer or a rare earth metal-containing layer, while the second high k gate dielectric stack comprises a second high k dielectric.
    • 提供了包括位于半导体衬底的表面上的至少一个nFET和至少一个pFET的互补金属氧化物半导体(CMOS)结构。 根据本发明,nFET和pFET都包括至少单个栅极金属,并且nFET栅极堆叠被设计为具有不具有净负电荷的栅极电介质堆叠,并且pFET栅极堆叠被工程化以具有栅极电介质 堆没有净正电荷。 特别地,本发明提供了一种CMOS结构,其中nFET栅极堆叠被设计成包括带边缘功函数,并且pFET栅极堆叠被设计为具有1/4间隙功函数。 在本发明的一个实施例中,第一栅极电介质堆叠包括第一高k电介质和含碱土金属的层或含稀土金属的层,而第二高k栅介质叠层包括第二高k电介质 。