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    • 38. 发明授权
    • Field-effect transistor with perovskite oxide channel
    • 具有钙钛矿氧化物通道的场效应晶体管
    • US5418389A
    • 1995-05-23
    • US149554
    • 1993-11-09
    • Yukio Watanabe
    • Yukio Watanabe
    • H01L21/8247G11C13/00H01L29/45H01L29/49H01L29/786H01L29/788H01L29/792H01L29/80H01L39/14H01L29/78C04B35/46G11C11/22H01L39/22
    • H01L29/7869G11C13/0007H01L29/45H01L29/4908G11C2213/31G11C2213/53
    • A field-effect transistor (FET) is described having a source; a drain; a channel formed between the source and the drain; and a gate electrode. The channel is composed of a film layer of oxide having the perovskite structure comprised of: (1) at least one metal selected from the group consisting of the metal elements in Group IV through Group XI of the Periodic Table of Elements and Bi; and (2) at least one metal selected from the group consisting of alkali metals, alkaline earth metals and rare earth metals. The layer has a film thickness of not larger than 1000 .ANG. and the electrical resistivity not less than 2 million centimeters. The channel of the oxide film layer is provided with a metal oxide insulator layer formed directly or through another metal oxide insulator layer and a gate electrode in electrical contact therewith. It is possible to make memories using this FET. In addition, it also becomes possible to reduce the size of devices using the FET of the invention.
    • 描述具有源极的场效应晶体管(FET) 排水 在源极和漏极之间形成的沟道; 和栅电极。 所述通道由具有钙钛矿结构的氧化物膜层组成,所述氧化物具有:(1)选自元素周期表第Ⅳ至Ⅺ族中的金属元素和Bi中的至少一种金属; 和(2)选自碱金属,碱土金属和稀土金属中的至少一种金属。 该层的膜厚不大于1000安培,电阻不小于200万厘米。 氧化膜层的沟道设置有直接或通过另一金属氧化物绝缘体层和与其电接触的栅电极形成的金属氧化物绝缘体层。 可以使用该FET进行记忆。 此外,也可以减小使用本发明的FET的器件的尺寸。
    • 39. 发明授权
    • High-voltage/large-current generator apparatus and method for generating
high-voltage/large-current
    • 高电压/大电流发电机装置及其生成高压/大电流的方法
    • US4725941A
    • 1988-02-16
    • US939108
    • 1986-12-08
    • Yukio Watanabe
    • Yukio Watanabe
    • G21B1/21H02M7/162H02M9/00H02M9/06H02M7/12
    • H02M7/1626
    • An apparatus of the invention includes an AC power source for providing AC electric power, a thyristor converter, being formed of self-extinctive switching elements, for converting the AC electric power to a DC excitation current, a coil for storing magnetic energy corresponding to the excitation current, and a bypass circuit coupled in parallel to the coil. The above appartus uses a method having the steps of: (a) circulating the excitation current between the thyristor converter and the coil when the excitation current reaches a reference value, and (b) commutating the circulated excitation current from the thyristor converter to the bypass circuit after a given elapsed period of time from when the excitation current reaches the reference value, so that the coil generates a high voltage or induces a large current corresponding to the magnitude of the stored magnetic energy.
    • 本发明的装置包括用于提供交流电力的交流电源,由自灭绝的开关元件形成的用于将交流电力转换为直流励磁电流的晶闸管转换器,用于存储对应于所述直流励磁电流的磁能的线圈 励磁电流和与线圈并联耦合的旁路电路。 上述程序使用的方法有以下步骤:(a)当激励电流达到参考值时,使可控硅转换器和线圈之间的励磁电流循环,(b)将循环的励磁电流从晶闸管转换器换向旁路 在从激励电流达到基准值开始经过一定时间后,线圈产生高电压或者产生与所存储的磁能的大小对应的大电流。