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    • 5. 发明授权
    • Depletion mode two-dimensional electron gas field effect transistor and
the method for manufacturing the same
    • 耗散模式二维电子气场效应晶体管及其制造方法
    • US4689646A
    • 1987-08-25
    • US741597
    • 1985-06-05
    • Yoshishige MatsumotoNaotaka Iwata
    • Yoshishige MatsumotoNaotaka Iwata
    • H01L29/812H01L21/20H01L21/268H01L21/324H01L21/338H01L29/04H01L29/15H01L29/778H01L29/80
    • H01L21/268H01L29/04H01L29/155H01L29/7787
    • The depletion mode two-dimensional electron gas field effect transistor comprises a substantially pure semiconductor layer, an impurity doped super lattice semiconductor layer formed on the pure semiconductor layer, the energy band gaps and the electron affinities of the pure semiconductor layer and the super lattice semiconductor layer being selected to produce the two-dimensional electron gas at the surface of the pure semiconductor layer when no bias is applied to the super lattice semiconductor layer, source and drain regions formed separatedly in the super lattice semiconductor layer to reach the pure semiconductor layer, a gate electrode formed on the super lattice semiconductor layer between the source and drain regions, and large energy band gap regions formed at side portions of the gate electrode which do not face the source and drain regions, the large energy band gap regions having an energy band gap larger than the super lattice semiconductor layer and being formed by local annealing to convert the super lattice semiconductor to a mixed semiconductor.
    • 耗尽型二维电子气体场效应晶体管包括基本上纯的半导体层,形成在纯半导体层上的杂质掺杂超晶格半导体层,纯半导体层和超晶格半导体的能带隙和电子亲和力 当在超晶格半导体层中分离形成的超晶格半导体层,源极和漏极区域不施加偏压以到达纯半导体层时,选择在纯半导体层的表面处产生二维电子气的层, 形成在源极和漏极区域之间的超晶格半导体层上的栅电极,以及形成在栅电极的不面向源区和漏区的侧部的大能带隙区,大能带隙区具有能量 带隙大于超晶格半导体层并由本地形成 l退火以将超晶格半导体转换成混合半导体。