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    • 17. 发明专利
    • Spin mosfet and reconfigurable logic circuit
    • 旋转MOSFET和可重新配置的逻辑电路
    • JP2010226063A
    • 2010-10-07
    • JP2009074785
    • 2009-03-25
    • Toshiba Corp株式会社東芝
    • SAITO YOSHIAKISUGIYAMA HIDEYUKIIGUCHI TOMOAKIMARUGAME TAKAOISHIKAWA MIZUE
    • H01L29/82H01L43/08
    • H01L43/02B01D53/1493B01D53/62G11C11/16G11C11/161G11C11/1673G11C11/1675G11C11/1695H01L28/00H01L29/0843H01L29/0895H01L29/66984H01L43/10
    • PROBLEM TO BE SOLVED: To reduce the influence of a leakage magnetic field on adjacent transistors, enable shift adjustment, and restrain spin relaxation in a channel region, even when vertical magnetization films are used in the ferromagnetic material of a MTJ (Magnetic Tunnel Junction) in the source/drain region of a spin MOSFET. SOLUTION: The spin MOSFET includes: a first ferromagnetic layer 72 provided on a semiconductor substrate 61, and having a fixed magnetization direction substantially perpendicular to a film plane; a semiconductor layer 74 provided as a channel on the first ferromagnetic layer; a second ferromagnetic layer 78 provided on the semiconductor layer, and having a variable magnetization direction substantially perpendicular to a film plane; a first tunnel barrier 80 provided on the second ferromagnetic layer; a third ferromagnetic layer 82 provided on the first tunnel barrier 80, and having a stacked structure formed of two layers of ferromagnetic films which are antiferromagnetically coupled via a nonmagnetic film interposed therebetween; a gate insulating film 90a provided on the side faces of the semiconductor layer; and a gate electrode 76 provided on a side opposite to the semiconductor layer with respect to the gate insulating film. COPYRIGHT: (C)2011,JPO&INPIT
    • 要解决的问题:为了减小泄漏磁场对相邻晶体管的影响,即使在MTJ(磁性)的铁磁材料中使用垂直磁化膜时,也能够进行移位调整并抑制沟道区域中的自旋弛豫 隧道结)在自旋MOSFET的源极/漏极区域。 解决方案:自旋MOSFET包括:设置在半导体衬底61上并具有基本上垂直于膜平面的固定磁化方向的第一铁磁层72; 在第一铁磁层上作为沟道设置的半导体层74; 设置在半导体层上的第二铁磁层78,具有基本上垂直于薄膜平面的可变磁化方向; 设置在第二铁磁层上的第一隧道势垒80; 设置在第一隧道势垒80上的第三铁磁层82,并且具有由两层铁磁性膜形成的层叠结构,所述层叠结构通过介于其间的非磁性膜反铁磁耦合; 设置在半导体层的侧面上的栅极绝缘膜90a; 以及相对于栅极绝缘膜设置在与半导体层相对的一侧的栅电极76。 版权所有(C)2011,JPO&INPIT
    • 19. 发明专利
    • JPS5938672B2 -
    • JPS5938672B2
    • 1984-09-18
    • JP13710575
    • 1975-11-14
    • Enaajii Konbaajon Debaisesu Inc
    • DEEBITSUDO ADORAAKAATO II PIITAASENMERUBIN PII SHOO
    • G11C11/41H01L21/331H01L29/08H01L29/68H01L29/73H01L45/00H03K19/08
    • H01L29/0821H01L29/0895H01L29/685H03K19/08
    • 1522327 Semiconductor devices ENERGY CONVERSION DEVICES Inc 13 Nov 1975 [14 Nov 1974] 46917/75 Heading H1K [Also in Division H3] A transistor-like device of which either the emitter region 4 (Fig. 1) or the collector region 8 1 (Fig. 5) is of a material which switches from a high resistance to a low resistance state on application thereacross of a voltage above a threshold value, is operated with selectively applicable emitter-base and emitter-collector biases, the latter of which is on its own insufficient to cause the switch material to become conductive but the joint application of both of which causes the material to switch. In the non-conductive condition of the switch material a negligible emitter-collector current flows, whereas when the switch material is conductive a maximum emitter-collector current flows. If, after simultaneous application of both biases, the emitter-base bias alone is removed a significant emitter-collector current, generally of an intermediate value less than the maximum value referred to above, continues to flow, and this provides a logic circuit in which three distinct conditions may be detected. In the circuit of Fig. 5 these are detected by directly sensing the level of the collector current using two amplitude level sensing means, such as Schmidt trigger circuits, 40 1 , 42 1 , set to trigger respectively at the intermediate and maximum collector current levels. The outputs of circuits 40 1 , 42 1 are coupled to binary logic circuit 44 in turn coupled to indicating means 46. In the circuit of Fig. 1 level sensing means 40, 42 are set to detect the presence or absence of collector and base currents respectively, and the outputs thereof supply a binary logic circuit 44 to provide indication of the same three logic states as in the previous embodiment. Constructionally, the switch material 4 or 8 1 is preferably r.f.-sputtered on to a Si body containing the other two device regions, e.g. formed by epitaxy. The switch material may be of either "threshold" or "memory" types, and several suitable materials are disclosed. Reset mechanisms appropriate to the particular type of switch material are employed (i.e. simple interruption of the emitter-collector current for a "threshold" material, and application of a reset current pulse for a "memory" material).