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    • 1. 发明授权
    • Field controlled thyristor with double-diffused source region
    • 具有双扩散源极区域的场控晶闸管
    • US4514747A
    • 1985-04-30
    • US357594
    • 1982-03-12
    • Kenji MiyataYoshio TerasawaSaburo OikawaSusumu MurakamiMasahiro Okamura
    • Kenji MiyataYoshio TerasawaSaburo OikawaSusumu MurakamiMasahiro Okamura
    • H01L29/08H01L29/10H01L29/744H01L29/74
    • H01L29/744H01L29/0834H01L29/1066
    • Disclosed is a field controlled thyristor in which a first semiconductor region of N.sup.+ -type, a second semiconductor region of N-type, third semiconductor regions of P-type, a fourth semiconductor region of N.sup.- -type and a fifth semiconductor region of P.sup.+ -type are formed in a semiconductor substrate having two main surfaces, the first, second and third semiconductor regions being exposed in the first main surface and the fifth semiconductor region being exposed in the second main surface; and the third semiconductor regions of P-type are spaced from each other by a predetermined spacing. The third semiconductor regions are connected with surface-exposed semiconductor regions exposed in the first main surface. The impurity concentration in the second semiconductor region decreases from the first semiconductor region toward the third semiconductor region so that a low forward voltage drop can be achieved along with a high reverse blocking voltage. Also disclosed is a method for forming the third semiconductor regions and the surface-exposed semiconductor regions through a diffusion process alone.
    • 公开了一种场控晶闸管,其中N +型的第一半导体区域,N型的第二半导体区域,P型的第三半导体区域,N型的第四半导体区域和P + 型形成在具有两个主表面的半导体衬底中,第一,第二和第三半导体区域暴露在第一主表面中,第五半导体区域暴露在第二主表面中; 并且P型的第三半导体区域彼此隔开预定间隔。 第三半导体区域与暴露在第一主表面中的暴露表面的半导体区域连接。 第二半导体区域中的杂质浓度从第一半导体区域朝向第三半导体区域减小,从而可以实现高反向阻断电压的低正向压降。 还公开了通过单独的扩散处理形成第三半导体区域和表面暴露的半导体区域的方法。
    • 3. 发明授权
    • Field controlled thyristor with dual resistivity field layer
    • 具有双电阻率场层的场控晶闸管
    • US4223328A
    • 1980-09-16
    • US911311
    • 1978-06-01
    • Yoshio TerasawaKenji MiyataMasayoshi NaitoTakuzo OgawaMasahiro Okamura
    • Yoshio TerasawaKenji MiyataMasayoshi NaitoTakuzo OgawaMasahiro Okamura
    • H01L29/80H01L29/08H01L29/10H01L29/167H01L29/74H01L29/744
    • H01L29/744H01L29/0834H01L29/1066H01L29/167
    • A field controlled thyristor is disclosed which comprises a first emitter region exposed to one main surface of a semiconductor substrate and having a first conductivity type, a second emitter region exposed to the other main surface of the substrate and having a second conductivity type, a base region connecting the first and the second emitter region, and a gate region provided in the base region. The gate region consists of a slab-like first portion disposed parallel to both the emitter and a second portion connecting the first slab-like portion with one of the main surfaces of the semiconductor substrate. The impurity concentration of the base region is higher in the portion of the base region nearer to the emitter region having the same conductivity type as that of the base region than in the portion of the base region nearer to the emitter region having the opposite conductivity type to that of the base region. The field controlled thyristor has a high forward blocking voltage gain (anode-cathode voltage/gate bias voltage), a large current rating, and a high switching power capability and its switching time is very short.
    • 公开了一种场控晶闸管,其包括暴露于半导体衬底的一个主表面并具有第一导电类型的第一发射极区域,暴露于衬底的另一个主表面并具有第二导电类型的第二发射极区域, 连接第一和第二发射极区域的区域,以及设置在基极区域中的栅极区域。 栅极区域由平行于发射极的板状第一部分和将第一板状部分与半导体衬底的主表面中的一个连接的第二部分组成。 基极区域的杂质浓度比基极区域具有与基极区域相同的导电类型的发射极区域的部分比在具有相反导电类型的发射极区域更靠近的部分的基极区域更高 到基地区。 场控晶闸管具有高正向阻断电压增益(阳极 - 阴极电压/栅极偏置电压),大额定电流和高开关功率能力,其开关时间非常短。
    • 5. 发明授权
    • Lateral field controlled thyristor
    • 横向场控晶闸管
    • US4258377A
    • 1981-03-24
    • US19567
    • 1979-03-12
    • Kenji MiyataTatsuya KameiMasahiro Okamura
    • Kenji MiyataTatsuya KameiMasahiro Okamura
    • H01L29/10H01L29/74H01L29/744
    • H01L29/102H01L29/7436H01L29/744
    • An improvement in a semiconductor switching device is disclosed which comprises a semiconductor substrate of a first conductivity type, an anode region of a second conductivity type formed in the semiconductor substrate adjacent to a major surface thereof, a gate region of the second conductivity type formed a distance from the anode region, and a cathode region of the first conductivity type formed in the gate region and having a higher impurity concentration than the semiconductor substrate. A channel region is formed immediately below the cathode region thereby to directly contact the cathode region to the semiconductor substrate. A current path extending from the anode region to the cathode region through the semiconductor substrate is interrupted by a depletion layer produced in the vicinity of the channel region upon application of a reverse bias across a pn-junction formed between the gate region and the cathode region. When no reverse bias voltage is applied, the anode region, the semiconductor substrate and the gate region cooperate to function as a thyristor. The semiconductor switching device has a high dv/dt capability and is easily implemented in integrated circuits.
    • 公开了一种半导体开关器件的改进,其包括第一导电类型的半导体衬底,形成在与其主表面相邻的半导体衬底中的第二导电类型的阳极区域,第二导电类型的栅极区形成为 与阳极区域的距离以及形成在栅极区域中并且具有比半导体衬底更高的杂质浓度的第一导电类型的阴极区域。 沟道区形成在阴极区的正下方,从而直接接触阴极区到半导体衬底。 通过在栅极区域和阴极区域之间形成的pn结上施加反向偏压,在由沟道区域附近产生的耗尽层将中断通过半导体衬底从阳极区延伸到阴极区的电流路径 。 当不施加反向偏置电压时,阳极区域,半导体衬底和栅极区域配合作为晶闸管。 半导体开关器件具有高的dv / dt能力,并且易于在集成电路中实现。
    • 7. 发明授权
    • Antenna system
    • 天线系统
    • US06310582B1
    • 2001-10-30
    • US09493658
    • 2000-01-28
    • Tatsuya UetakeMasahiro OkamuraMidori TairaAkito KobayashiKen Satou
    • Tatsuya UetakeMasahiro OkamuraMidori TairaAkito KobayashiKen Satou
    • H01A300
    • H01Q21/28H01Q1/125H01Q3/08
    • When communication is performed simultaneously with two moving bodies such as a satellite, an antenna construction in which a plurality of antennas do not become an obstacle to each other's communication and the direction (the azimuth angle and the elevation angle) adjusting mechanism thereof can be realized with a simple construction. The two antennas have another movable portion (a rotation mechanism with respect to the axis) independently, while sharing the direction adjusting mechanism for the azimuth angle and the elevation angle. The rotation axis of the rotation mechanism of each antenna faces the same direction on the same plane, and each rotation mechanism is separately arranged in an area defined by a plane obtained by extending the axis of the azimuth angle adjusting mechanism toward the axial direction of the elevation angle adjusting mechanism. The azimuth angle and the elevation angle of respective antennas can be separately adjusted by the rotation mechanism with respect to the axis, hence the antennas can be directed to the communication targets existing in the two different directions simultaneously from the reception point.
    • 当与诸如卫星的两个移动体同时进行通信时,可以实现多个天线不会成为彼此通信的障碍物的天线结构以及其方向(方位角和仰角)调节机构 施工简单。 两个天线独立地具有另一个可移动部分(相对于轴线的旋转机构),同时共享用于方位角和仰角的方向调节机构。 每个天线的旋转机构的旋转轴线在相同的平面上面向相同的方向,并且每个旋转机构分开布置在由通过使方位角调节机构的轴线朝向轴向方向延伸而获得的平面所限定的区域中 仰角调整机构。 可以通过旋转机构相对于轴分别调整各个天线的方位角和仰角,从而可以从接收点同时将天线指向存在于两个不同方向上的通信对象。