摘要:
A method of manufacturing a semiconductor device, wherein a semiconductor wafer having a first impurity-doped layer and a second impurity-doped layer having a higher impurity concentration than that of the first impurity-doped layer is formed. A first silicon substrate, having a first impurity-doped layer and a third impurity-doped layer which has a higher impurity concentration than that of the first impurity-doped layer and the same conductivity type as that of the second impurity-doped layer, and whose surface is mirror-polished, is brought into contact with a second silicon substrate which has a higher impurity concentration than that of the first impurity-doped layer and the same conductivity type as that of the second impurity-doped layer, and whose surface is mirror-polished, so that the mirror-polished surfaces thereof are in contact with each other. The contacting substrates are then placed in a clean atmosphere so that virtually no foreign substances are present therebetween, and annealed at a temperature of not less than 200.degree. C. so as to bond them together, thereby forming the second impurity-doped layer consisting of the third impurity doped layer and the second silicon substrate.
摘要:
A composite integrated circuit device includes a semiconductor element chip, a positioning guide formed on the semiconductor element chip, and an electronic element set in a preset position on the semiconductor element chip in a self-alignment manner by means of the positioning guide and mounted thereon. Also disclosed is are lateral, thin film devices with tapered shapes to reduce breakdown.
摘要:
A thyristor with insulated gates includes turn-off and turn-on MOSFETs. The turn-on MOSFET has a turn-on gate employing a p-type base as a channel and extending over an n-type base and an n-type emitter. The turn-off MOSFET has n-type drain and source layers formed in a p-type base layer, and a turn-off gate extending over the drain and source layers. The n-type drain layer is short-circuited with the p-type base layer via a drain electrode. The drain electrode is formed near an n-type emitter layer. When the thyristor is to be turned off, the first voltage is applied to the turn-on gate, and the second voltage is applied to the turn-off gate while the first voltage is applied to the turn-on gate. After the application of the second voltage continues for a predetermined period of time, the application of the first voltage to the turn-on gate is stopped. With this operation, the thyristor can be turned off even with a large current.
摘要:
A dielectric isolation substrate comprises a first semiconductor wafer, a second semiconductor wafer bonded on the first semiconductor wafer with a first insulating layer interposed therebetween, a semiconductor layer formed on the second semiconductor wafer, a first groove formed in the semiconductor layer and the second semiconductor wafer so as to reach the first insulating layer, thereby isolating the semiconductor layer and the second semiconductor wafer, and a second insulating layer formed on the side face of the first groove or embedded in the first groove. In this dielectric isolation substrate, a high breakdown voltage element and a low breakdown voltage element are formed in a region isolated by the first groove.
摘要:
A turn-on/off driving method for an insulated gate thyristor which has a first gate electrode insulatively provided above a first base layer and functioning as the gate of MOSFET, and a second gate electrode formed on the second base layer. To execute the turn-off driving operation, a first voltage is applied to the second gate electrode to produce reverse biasing between the second emitter layer and the second base layer, thereby to quench this thyristor. A second voltge which renders the transistor nonconductive is applied the first gate electrode before the application of the first voltage. The turn-on driving operation of the thyristor may be performed by using the first gate electrode.
摘要:
A turn-on/off driving technique for an insulated gate thyristor which has a first gate electrode insulatively provided above a first base layer and functioning as a gate of MOSFET, and a second gate electrode formed on the second base layer. To drive the turn-on of the thyristor, a first voltage for rendering the MOSFET conductive is applied to the first gate electrode, while substantially simultaneously a second voltage for producing forward biasing between the second base layer and a second emitter layer is applied to the second gate electrode. To turn-off drive the thyristor, a third voltage for reverse biasing between the second emitter layer and the second base layer to stop the operation of the thyristor is applied to the second gate, while the MOSFET is kept conductive. The thyristor starts turning off in response to the voltage application. At this time, charge carriers exhausted from the second emitter layer are allowed to flow into the first base layer through the channel region of the MOSFET, thereby suppressing the local concentration of the turn-off current in the thyristor.
摘要:
A gate turn-off thyristor drive system with low power loss when it is in the turn-off mode, is disclosed. A first turn-off pulse of a predetermined amplitude is applied to a first gate electrode. A second turn-off pulse is applied to a second gate electrode. An amplitude of the second turn-off pulse is smaller in absolute value than that of the first turn-off pulse. The fall time of the anode current at the time of turn-off is reduced, and the initial value of the tail current of the anode current is reduced. The power loss as the product of the anode voltage and the anode current is reduced.
摘要:
An integrated circuit device comprising an active layer of a first conductivity type insulatively disposed over a semiconductor substrate, a lateral bipolar transistor fabricated in the active layer, the lateral bipolar transistor comprising a first base layer of a second conductivity type which is formed in the active layer, an emitter layer of the first conductivity, and a collector of the first conductivity which is formed in the active layer on a lateral side of the first base layer, a MOS transistor fabricated in the active layer, the MOS transistor comprising a second base layer of the second conductivity type, a source layer of the first conductivity type which is formed in the second base layer, a drain layer of the first conductivity type which is formed in the active layer, and a gate electrode insulatively disposed over the second base layer between the source layer and the drain layer, and an isolation layer formed in the active layer for separating the bipolar transistor and the MOS transistor from each other.
摘要:
A composite integrated circuit device includes a semiconductor element chip, a positioning guide formed on the semiconductor element chip, and an electronic element set in a preset position on the semiconductor element chip in a self-alignment manner by means of the positioning guide and mounted thereon.
摘要:
A thyristor is disclosed which has a laminated structure of a first emitter layer of n.sup.+ conductivity type, a first base layer of p type, a second base layer of p.sup.- type, a second emitter layer of n type, and a second emitter layer of p.sup.+ type. The first base layer has a first exposed surface portion which is in lateral contact with the first emitter layer, and a second exposed surface portion which is in lateral contact with the second base layer. The second surface portion defines a layer portion of the second base layer which is positioned between the first base layer and the second emitter layer. An anode electrode is connected to said second emitter layer, whereas a cathode electrode is connected to the second base layer and the first emitter layer. A first gate electrode is formed on the first surface portion of the first base layer. A second gate electrode is insulatively disposed above the second surface portion of the first base layer to form a MOSFET together with the first base layer and the second emitter layer. The layer portion of the second base layer serves as a channel region of the MOSFET.
摘要翻译:公开了一种晶闸管,其具有n +导电类型的第一发射极层,p型的第一基极层,p型的第二基极层,n型的第二发射极层和n型的第二发射极层 p +型。 第一基层具有与第一发射极层侧向接触的第一暴露表面部分和与第二基底层侧向接触的第二暴露表面部分。 第二表面部分限定位于第一基底层和第二发射体层之间的第二基底层的层部分。 阳极电极连接到所述第二发射极层,而阴极连接到第二基极层和第一发射极层。 第一栅电极形成在第一基层的第一表面部分上。 第二栅电极被绝对地设置在第一基极层的第二表面部分上方,以与第一基极层和第二发射极层一起形成MOSFET。 第二基极层的层部分用作MOSFET的沟道区。