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    • 3. 发明授权
    • MOSFET with super-steep retrograded island
    • 具超级陡峭退火岛的MOSFET
    • US07723750B2
    • 2010-05-25
    • US11774221
    • 2007-07-06
    • Huilong ZhuEffendi LeobandungAnda C. MocutaDan M. Mocuta
    • Huilong ZhuEffendi LeobandungAnda C. MocutaDan M. Mocuta
    • H01L29/737
    • H01L29/7842H01L21/26586H01L21/823807H01L21/823814H01L29/105H01L29/1608H01L29/6656H01L29/6659H01L29/66636H01L29/7833H01L29/7848
    • The present invention comprises a method for forming a semiconducting device including the steps of providing a layered structure including a substrate, a low diffusivity layer of a first-conductivity dopant; and a channel layer; forming a gate stack atop a protected surface of the channel layer; etching the layered structure selective to the gate stack to expose a surface of the substrate, where a remaining portion of the low diffusivity layer provides a retrograded island substantially aligned to the gate stack having a first dopant concentration to reduce short-channel effects without increasing leakage; growing a Si-containing material atop the recessed surface of the substrate; and doping the Si-containing material with a second-conductivity dopant at a second dopant concentration. The low diffusivity layer may be Si1-x-yGexZy, where Z can be carbon (C), xenon (Xe), germanium (Ge), krypton (Kr), argon (Ar), nitrogen (N), or combinations thereof.
    • 本发明包括一种形成半导体器件的方法,包括以下步骤:提供包括衬底,第一导电掺杂剂的低扩散层的分层结构; 和通道层; 在沟道层的受保护表面上方形成栅极堆叠; 蚀刻对栅极堆叠选择性的层状结构以暴露衬底的表面,其中低扩散层的剩余部分提供基本上与具有第一掺杂剂浓度的栅极堆叠对准的退化岛,以减少短沟道效应而不增加泄漏 ; 在衬底的凹陷表面的顶部生长含Si材料; 并且以第二掺杂剂浓度用第二导电掺杂剂掺杂含Si材料。 低扩散性层可以是Si1-x-yGexZy,其中Z可以是碳(C),氙(Xe),锗(Ge),氪(Kr),氩(Ar),氮(N)或它们的组合。
    • 8. 发明授权
    • Raised isolation structure self-aligned to fin structures
    • 升高的隔离结构自对准鳍结构
    • US08586449B1
    • 2013-11-19
    • US13603872
    • 2012-09-05
    • Josephine B. ChangPaul ChangMichael A. GuillornEffendi Leobandung
    • Josephine B. ChangPaul ChangMichael A. GuillornEffendi Leobandung
    • H01L21/76
    • H01L21/845H01L21/76229
    • Raised isolation structures can be formed at the same level as semiconductor fins over an insulator layer. A template material layer can be conformally deposited to fill the gaps among the semiconductor fins within each cluster of semiconductor fins on an insulator layer, while the space between adjacent clusters is not filled. After an anisotropic etch, discrete template material portions can be formed within each cluster region, while the buried insulator is physically exposed between cluster regions. A raised isolation dielectric layer is deposited and planarized to form raised isolation structures employing the template material portions as stopping structures. After removal of the template material portions, a cluster of semiconductor fins are located within a trench that is self-aligned to outer edges of the cluster of semiconductor fins. The trench can be employed to confine raised source/drain regions to be formed on the cluster of semiconductor fins.
    • 升高的隔离结构可以在与绝缘体层上的半导体鳍片相同的水平上形成。 可以共形沉积模板材料层以填充绝缘体层上的每个半导体翅片簇内的半导体鳍片之间的间隙,而相邻簇之间的空间未被填充。 在各向异性蚀刻之后,可以在每个簇区域内形成离散的模板材料部分,而埋入的绝缘体在簇区域之间物理暴露。 沉积并平坦化凸起的隔离介电层以形成采用模板材料部分作为停止结构的凸起隔离结构。 在去除模板材料部分之后,一组半导体鳍片位于与半导体鳍片簇的外边缘自对准的沟槽内。 沟槽可以用来限制要形成在半导体鳍片簇上的凸起的源极/漏极区域。