摘要:
The disclosed thyristor comprises an n.sup.- semi-conductor layer, a p.sup.- semiconductor layer disposed on one surface of the n.sup.- layer to form a pn junction between them, an n.sup.+ and a p.sup.+ semiconductor layer disposed on the other surfaces of the n.sup.- and p.sup.- layers respectively to serve as main electrodes and a p.sup.+ and a n.sup.+ apertured gate layers disposed within the n.sup.- and p.sup.- layers respectively and provided with a gate electrode. An intrinsic semiconductor layer may be substituted for the n.sup.- and p.sup.- layers. A process of producing such a thyristor is also disclosed.
摘要:
A semiconductor device includes a substrate crystal of a type for epitaxial growth thereon. The substrate crystal has a (111)A face and a (111)B face. Also provided are at least two semiconductor regions of different conductivity types deposited by way of epitaxial growth on the (111)A face of the substrate crystal according to metal organic chemical vapor deposition, thereby providing a structure having a source and a drain. A gate side includes the (111)B face of the substrate crystal. A gate insulating layer is deposited by way of epitaxial growth on the gate side according to molecular layer epitaxy. Alternatively, the at least two semiconductor regions may be deposited on the (111)B face of the substrate crystal according to molecular layer epitaxy, and the gate insulating layer may be deposited on the (111)A face of the substrate crystal according to metal organic chemical vapor deposition.
摘要:
A semiconductor material to be etched is held in a reaction chamber at a predetermined temperature. A reactive etching gas such as a chlorine gas is introduced into the reaction chamber for a first period of time. Thereafter, the reaction chamber is evacuated for a second period of time, and ultraviolet radiation is applied to the semiconductor material for a third period of time within the second period of time for thereby etching the semiconductor material to a depth on the order of a molecular or atomic layer.
摘要:
A semiconductor device has an n.sup.+ source region, a first n.sup.- channel region, a barrier layer, a second n.sup.- channel region, a pair of n.sup.+ drain regions, an insulating film, and a pair of metal electrodes over the respective n.sup.+ drain regions, all successively disposed on an upper surface of an n.sup.+ crystal substrate. The drain regions and the metal electrodes jointly provide a storage electric capacitance. A source electrode is disposed on the lower surface of the n.sup.+ crystal substrate. Bit information can be written and read at a high speed by tunneling through the barrier layer. According to a method of manufacturing the above semiconductor device, the n.sup.+ source region, the first n.sup.- channel region, the barrier layer, the second n.sup.- channel region, the n.sup.+ drain regions, the insulating film, and the metal electrodes are successively deposited on the n.sup.+ crystal substrate in a growing apparatus. The metal electrodes and the source electrode are formed by depositing a metal and a low-resistance semiconductor selectively or both in one location within the growing apparatus.
摘要:
A notched insulation gate static induction transistor integrated circuit ording to the present invention comprises an enhancement mode CMOS logic circuit including a notched insulation gate static induction transistor in which a threshold voltage is determined to prevent current from flowing in a standby mode, and a depletion enhancement mode CMOS logic circuit including a notched insulation gate static induction transistor in which a threshold voltage is determined to cause current to slightly flow in the standby mode. The enhancement mode CMOS logic circuit and the depletion enhancement mode CMOS logic circuit are formed on a major surface of a substrate, and the depletion enhancement mode CMOS logic circuit is used in a circuit in which an average power consumption in a switching operation is higher than that in the standby mode.
摘要:
Material and impurity gases are introduced into a crystal growth chamber to grow a crystal film on a GaAs substrate. A light beam emitted from a variable-wavelength light source is applied to the crystal film being grown on the substrate while varying the wavelength of the light beam. The dependency, on the wavelength of the light beam, of the intensity of light reflected by the crystal film is measured, and an optimum wavelength is selected for measurement depending on the type of molecules adsorbed while the crystal film is being grown. Light is then applied at the optimum wavelength to the crystal film being grown, and a time-dependent change in the intensity of light reflected by the crystal film is measured. The rate at which the material gases are introduced into the crystal growth chamber is adjusted to control the growth rate of the crystal film, the composition ratio of a mixed crystal thereof, and the density of the impurity therein.
摘要:
A double gate static induction thyristor comprises a semiconductor substrate, a first gate region formed at a first principal surface of the substrate, and a first semiconductor region of a first conduction type formed on the same first principal surface. A second gate region is formed at a second principal surface of the substrate, and a second semiconductor region of a second conduction type is formed on the same second principal surface. Gate electrodes are formed on the first and second gate regions, and main electrodes are formed on the first and second semiconductor regions, so that portions of the semiconductor regions surrounded by the gate regions form a current path between the main electrodes. Further, impurity is deeply diffused in portions of the first and second gate regions formed with the gate electrodes.
摘要:
A high sensitivity semiconductor photo-electric converter is provided by electrically isolating the gate region of a static induction transistor which exhibits non-saturating current versus voltage characteristic. Optically ionized minority carriers are stored in the gate region to control the potential thereof. A semiconductor gate region provided with a insulated gate is very effective to enhance the dynamic range of the converter. Non-saturating characteristic enables enlargement of the output current simply by increasing the drain voltage. A high-speed and high sensitivity image pick-up device can be materialized by integrating a multiplicity of the static induction type photo-electric converter elements. A switching transistor may be merged in the gate region of each photo-electric converter element to enhance the operation speed of the image pick-up device.
摘要:
In a static induction type thyristor comprising a low impurity concentration channel region having opposed first and second major surfaces, a first main electrode region having one conductivity type and a second main electrode region having another conductivity type opposite to the one conductivity type and provided on the first and second major surfaces, respectively, and a gate region provided in the vicinity of the first main electrode region, there intervenes, between the channel region and the second main electrode region, a thin layer region having the same conductivity type as that of first main electrode region. The provision of this thin layer reegion contributes to allowing a markedly low impurity concentration as well as a decreased thickness of the channel region for a given maximum forward blocking voltage, making it feasible to obtain a high maximum forward blocking voltage and a high switching speed.
摘要:
In a method of performing a solution growth of a ZnSe crystal using Se as a solvent and relying on the temperature difference technique, the growth is performed under the conditions that the vapor pressure of Zn which is lower than the vapor pressure of Se is applied, under controlled manner, to the solvent during the growth process, in which the value of the Zn vapor pressure is held constant at 7.2 atm. .+-.30%, whereby a ZnSe crystal having a good crystal perfection is obtained.