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    • 7. 发明公开
    • Silicon electron emitter
    • Elektronenemittierende Vorrichtung aus Silizium
    • EP1255272A2
    • 2002-11-06
    • EP02252584.4
    • 2002-04-11
    • Hewlett-Packard Company
    • Sheng, XiaKoshida, NobuyoshiKuo, Huei-Pei
    • H01J1/312H01J9/02
    • H01J1/308H01J9/022Y10S438/96
    • A high emission electron emitter and a method of fabricating a high emission electron emitter are disclosed. A high emission electron emitter 10 includes an election injection layer 1. an active layer of high porosity porous silicon material 3 in contact with the electron iniection layer 1, a contact layer of low porosity porous silicon material 5 in contact with the active layer 3 and including an interface surface 12 with a heavily doped region 8, and an optional top electrode 7 in contact with the contact layer 5. The contact layer 5 reduces contact resistance between the active layer 3 and the top electrode 7 and the heavily doped region 8 reduces resistivity of the contact layer 5 thereby increasing electron emission efficiency and stable electron emission from the top electrode 7. The electron injection layer 1 is made from an electrically conductive material such as n+ semiconductor, n+ single crystal silicon, a metal, a silicide, or a nitride. The active layer 3 and the contact layer 5 are formed in a layer of silicon material 6 that is deposited on the electron injection layer 1 and then electrochemically anodized in a hydrofluoric acid solution. Prior to the anodization. the interface surface 12 can be doped to form the heavily doped region 8. The layer of silicon material 8 can be porous epitaxial silicon, porous polysilicon, porous amorphous silicon, and porous silicon carbide.
    • 公开了高发射电子发射体和制造高发射电子发射体的方法。 高发射电子发射器10包括选择注入层1.与电子接触层1接触的高孔隙率多孔硅材料3的活性层,与有源层3接触的低孔隙率多孔硅材料5的接触层和 包括具有重掺杂区域8的界面12和与接触层5接触的可选顶部电极7.接触层5降低有源层3与顶部电极7之间的接触电阻,并且重掺杂区域8减小 接触层5的电阻率从而增加了电子发射效率和从顶部电极7稳定的电子发射。电子注入层1由导电材料制成,例如n +半导体,n +单晶硅,金属,硅化物或 氮化物。 有源层3和接触层5形成在沉积在电子注入层1上的硅材料层6中,然后在氢氟酸溶液中电化学阳极氧化。 在阳极氧化之前。 可以掺杂界面12以形成重掺杂区8.硅材料层8可以是多孔外延硅,多孔多晶硅,多孔非晶硅和多孔碳化硅。