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    • 3. 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。
    • 4. 发明申请
    • Diffusion barrier for nickel silicides in a semiconductor fabrication process
    • 半导体制造工艺中硅化镍的扩散阻挡层
    • US20070026593A1
    • 2007-02-01
    • US11192968
    • 2005-07-29
    • Dharmesh JawaraniChun-Li LiuMarius Orlowski
    • Dharmesh JawaraniChun-Li LiuMarius Orlowski
    • H01L21/8234H01L21/336
    • H01L29/665H01L29/1083H01L29/4925H01L29/66636H01L29/7834
    • A semiconductor fabrication method includes forming a gate module overlying a substrate. Recesses are etched in the substrate using the gate module as a mask. A barrier layer is deposited over the wafer and anisotropically etched to form barrier “curtains” on sidewalls of the source/drain recesses. A metal layer is deposited wherein the metal layer contacts a semiconductor within the recess. The wafer is annealed to form a silicide selectively. The diffusivity of the metal with respect to the barrier structure material is an order of magnitude less than the diffusivity of the metal with respect to the semiconductor material. The etched recesses may include re-entrant sidewalls. The metal layer may be a nickel layer and the barrier layer may be a titanium nitride layer. Silicon or silicon germanium epitaxial structures may be formed in the recesses overlying the semiconductor substrate.
    • 半导体制造方法包括形成覆盖在基板上的栅极模块。 使用栅极模块作为掩模在衬底中蚀刻凹陷。 阻挡层沉积在晶片上并进行各向异性蚀刻以在源极/漏极凹槽的侧壁上形成屏障“窗帘”。 沉积金属层,其中金属层与凹槽内的半导体接触。 将晶片退火以选择性地形成硅化物。 金属相对于阻挡结构材料的扩散率比金属相对于半导体材料的扩散率小一个数量级。 蚀刻的凹槽可以包括再入口侧壁。 金属层可以是镍层,阻挡层可以是氮化钛层。 可以在覆盖半导体衬底的凹部中形成硅或硅锗外延结构。