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    • 82. 发明授权
    • Multiple precursor showerhead with by-pass ports
    • 带有旁路端口的多个前身淋浴头
    • US08361892B2
    • 2013-01-29
    • US12815557
    • 2010-06-15
    • Alexander TamAnzhong ChangSumedh Acharya
    • Alexander TamAnzhong ChangSumedh Acharya
    • H01L21/36
    • B05B1/18C23C16/45519C23C16/45565C23C16/52C30B25/14H01L21/67115
    • A method and apparatus that may be utilized for chemical vapor deposition and/or hydride vapor phase epitaxial (HVPE) deposition are provided. In one embodiment, the apparatus a processing chamber that includes a showerhead with separate inlets and channels for delivering separate processing gases into a processing volume of the chamber without mixing the gases prior to entering the processing volume. In one embodiment, the showerhead includes one or more cleaning gas conduits configured to deliver a cleaning gas directly into the processing volume of the chamber while by-passing the processing gas channels. In one embodiment, the showerhead includes a plurality of metrology ports configured to deliver a cleaning gas directly into the processing volume of the chamber while by-passing the processing gas channels. As a result, the processing chamber components can be cleaned more efficiently and effectively than by introducing cleaning gas into the chamber only through the processing gas channels.
    • 提供了可用于化学气相沉积和/或氢化物气相外延(HVPE)沉积的方法和装置。 在一个实施例中,该设备包括具有分离的入口和通道的喷头的处理室,用于在进入处理容积之前将不同的处理气体输送到室的处理容积而不混合气体。 在一个实施例中,喷头包括一个或多个清洁气体导管,其构造成在旁路处理气体通道的同时将清洁气体直接输送到室的处理容积中。 在一个实施例中,喷头包括多个计量端口,其配置成在旁路处理气体通道的同时将清洁气体直接输送到室的处理容积中。 结果,与仅通过处理气体通道将清洁气体引入室中相比,可以更有效和有效地清洁处理室部件。
    • 89. 发明授权
    • InxGa1-xAsYP1-Y quaternary etch stop for improved chemical resistivity of gallium arsenide field effect transistors
    • InxGa1-xAsYP1-Y四次蚀刻停止,用于提高砷化镓场效应晶体管的化学电阻率
    • US08288253B1
    • 2012-10-16
    • US13173006
    • 2011-06-30
    • Allen W. HansonAnthony Kaleta
    • Allen W. HansonAnthony Kaleta
    • H01L21/20H01L21/36
    • H01L21/30612H01L29/201H01L29/66462
    • A process for fabricating a semiconductor device. The process including (a) growing a channel layer on a buffer layer, (b) growing a barrier layer on the channel layer, (c) epitaxially growing a quaternary etch-stop layer on the barrier layer, (d) growing a first contact layer on the quaternary etch-stop layer, (e) growing a second contact layer on the first contact layer, (f) etching portions of the second contact layer to reveal a first recess surface, and (g) etching portions of the first contact layer to reveal a second recess surface. The second contact layer may be a highly doped contact layer. The second recess surface generally forms a gate region. The first and the second contact layers have a first etch rate and the quaternary etch-stop layer has a second etch rate in a chosen first etch chemistry.
    • 一种制造半导体器件的工艺。 该方法包括(a)在缓冲层上生长通道层,(b)在沟道层上生长阻挡层,(c)在阻挡层上外延生长四分之一蚀刻停止层,(d)生长第一接触 (e)在第一接触层上生长第二接触层,(f)蚀刻第二接触层的部分以露出第一凹部表面,以及(g)蚀刻第一接触部分 层以露出第二凹槽表面。 第二接触层可以是高度掺杂的接触层。 第二凹面通常形成栅极区域。 第一和第二接触层具有第一蚀刻速率,并且四次蚀刻停止层在所选择的第一蚀刻化学中具有第二蚀刻速率。