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    • 64. 发明授权
    • Selective encapsulation, controlled atmosphere annealing for III-V
semiconductor device fabrication
    • III-V半导体器件制造的选择性封装,受控气氛退火
    • US4396437A
    • 1983-08-02
    • US260455
    • 1981-05-04
    • Siang P. KwokMilton FengVictor K. Eu
    • Siang P. KwokMilton FengVictor K. Eu
    • H01L21/324H01L21/265
    • H01L21/3245
    • A post-ion implantation annealing technique is provided to remove implantation damage in the active region of III-V (e.g., GaAs) semiconductor devices formed in a III-V semi-insulating substrate and separated by a field region. The technique involves applying a dielectric encapsulation selectively over the device active area and annealing in a controlled reducing atmosphere which includes the Group V element (e.g., arsenic). The dielectric encapsulant over the active region permits migration of the species employed to render the substrate semi-insulating (e.g., Cr in GaAs substrates), thereby resulting in high carrier mobility in the active region. Without encapsulation, migration of the species in the field region is substantially suppressed, thereby resulting in good inter-device isolation.
    • 提供离子后注入退火技术以去除在III-V半绝缘衬底中形成并被场区域分离的III-V(例如,GaAs)半导体器件的有源区域中的注入损伤。 该技术涉及在器件有源区域上选择性地施加电介质封装并在包括第V族元素(例如砷)的受控还原气氛中进行退火。 有源区上的电介质密封剂允许用于使衬底半绝缘(例如,GaAs衬底中的Cr)所用的物质的迁移,从而在有源区域中导致高的载流子迁移率。 没有包封,实质上抑制了场区域中的物质的迁移,从而导致良好的器件间隔离。