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    • 4. 发明申请
    • MOS device with multi-layer gate stack
    • 具有多层栅极堆叠的MOS器件
    • US20070176247A1
    • 2007-08-02
    • US11343623
    • 2006-01-30
    • Chun-Li LiuMarius OrlowskiMatthew Stoker
    • Chun-Li LiuMarius OrlowskiMatthew Stoker
    • H01L29/94
    • H01L29/4975H01L21/28097H01L29/517H01L29/518H01L29/78
    • Methods and apparatus are provided for semiconductor devices. The apparatus comprises a substrate having therein a source region and a drain region separated by a channel region extending to a first surface of the substrate, and a multilayered gate structure located above the channel region. The gate structure comprises, a gate dielectric, preferably of an oxide of Hf, Zr or HfZr substantially in contact with the channel region, a first conductor layer of, for example an oxide of MoSi overlying the gate dielectric, a second conductor layer of, e.g., poly-Si, overlying the first conductor layer and adapted to apply an electrical field to the channel region, and an impurity migration inhibiting layer (e.g., MoSi) located above or below the first conductor layer and adapted to inhibit migration of a mobile impurity, such as oxygen for example, toward the substrate.
    • 为半导体器件提供了方法和装置。 该装置包括其中具有源极区和漏极区的衬底,漏极区被延伸到衬底的第一表面的沟道区分离,以及位于沟道区上方的多层栅极结构。 栅极结构包括:栅极电介质,优选地与沟道区基本上接触的Hf,Zr或HfZr的氧化物,例如覆盖栅极电介质的MoSi的氧化物的第一导体层, 例如多晶硅,覆盖在第一导体层上并且适于向沟道区施加电场,以及位于第一导体层上方或下方的杂质迁移抑制层(例如MoSi),并适于抑制移动 杂质,例如氧气,朝向衬底。