摘要:
A vibration isolation apparatus for preventing shaking and vibration of a stage of an exposure apparatus or the like uses a vibration isolation mount formed of a spring buffer system employing a spring member and a fluid buffer system employing a viscous fluid as a vibration isolation base which is disposed between a base member on which an exposure unit is mounted and an installation surface on which the base member is installed so as to support the base member. The coefficient of viscous drag of the viscous fluid is varied to vary a damping coefficient which depends on the coefficient of viscous drag thereby to vary rigidity of the vibration isolation mount, whereby vibration transmitted from an external source and vibration associated with a stage movement are damped.
摘要:
The invention provides a semi-conductor light valve device and a process for fabricating the same. The device comprises a composite substrate having a supporte substrate, a light-shielding thin film formed on said supporte substrate and semiconductive thin film disposed on the light-shielding thin film with interposing an insulating thin film. A switching element made of a transistor and a transparent electrode for driving light valve are formed on the semiconductive thin film, and the switching element and the transparent electrode are connected electrically with each other. The transistor includes a channel region in the semiconductive thin film and a main gate electrode for controlling the conduction in the channel region, and the light-shielding thin film layer is so formed as to cover the channel region on the side opposite to said channel region, so as to prevent effectively a back channel and shut off the incident light.
摘要:
A non-volatile memory device in which gate electrodes are formed on an upper surface and a lower surface of the channel via insulating layers, respectively, one of them is used as a read electrode and the other is used as a write electrode, whereby, at a read operation, the reading is carried out with a reduced influence upon stored charges stored at the time of writing. Particularly, it has a structure in which a source and drain region of the non-volatile semiconductor memory device is formed in the semiconductor layer formed on the insulating layer and, at the same time, one of the read electrode and write electrode is buried in the insulating layer.
摘要:
A movable mirror supporting mechanism for supporting a movable mirror forming a part of an interferometric measurement system and having a rectangular cross-section onto an object, with a reflecting surface of said movable mirror being arranged normal to a measuring direction. The movable mirror supporting mechanism includes at least two fixtures for securing the movable mirror from above onto respective movable mirror supporting portions provided on the object. Positions on the movable mirror at which the movable mirror is secured onto the measuring object by the fixtures are defined to be out of that area of the reflecting surface of the movable mirror which is utilized for interferometric measurement.
摘要:
A light valve device has a drive substrate integrated with a drive electrode. A transistor is connected to the drive electrode and a driving circuit energizes the drive electrode through the transistor. An opposed substrate is provided opposed to the drive electrode, and an electrooptical material layer is disposed between the drive substrate and the opposed substrate. The drive substrate has a structure comprising a substrate layer and a semiconductor single crystal thin film layer. The semiconductor single crystal thin film layer is made by thinning a semiconductor single crystal wafer which has been bonded to the substrate layer. The light valve device has a small size and high pixel density and can be formed using miniaturization technology. The light valve can be used for a small size, high resolution video projector and a color matrix display device.
摘要:
A linear motor has two relatively members moveable a coil mounted to one of the two members, a magnet mounted to the other of the two members, a circulating pump for circulating a cooling medium via a circulating pipe in an outer tube surrounding the coil, a pressure detecting device for detecting the pressure of the cooling medium, and a control system for controlling the operation of the circulating pump based on the detected pressure value from the pressure detecting device.
摘要:
A photoelectric cell of the present invention comprises a first conduction type first semiconductor region; a second conduction type second semiconductor region formed in the surface of the first semiconductor region so as to form a pn junction together with the first semiconductor region; a first conductive region formed in the surface of the first semiconductor region so as to be separated from the second semiconductor region and to form a first rectifier junction together with the first semiconductor region; a second conductive region formed in the surface of the first semiconductor region so as to be separated from the first conductive region and to be electrically connected to the second semiconductor region to form a second rectifier junction together with the first semiconductor region; a third conductive region formed in the surface of the second semiconductor region so as to form a third rectifier junction together with the second semiconductor region; a first insulated gate formed on a first channel forming region in the surface of the first semiconductor region defined between the first conductive region and the second conductive region on and a second insulated gate formed on a second channel forming region in the surface of the second semiconductor region defined between the first semiconductor region and the third conductive region.
摘要:
A semiconductor memory cell, or a semiconductor memory cell for ASICs, of the structure is provided which ensures stable transistor operation, which does not require a large-capacitance capacitor as required in conventional DRAMs, which ensures reliable reading and writing of information, that permits short-channel design, and that allows the cell area to be reduced. The semiconductor memory cell includes: an information storage transistor TR.sub.1 comprising a semiconductor channel layer Ch.sub.1, first and second conductive gates G.sub.1, G.sub.2, and first and second conductive layers L.sub.1, L.sub.2 ; and a switching transistor TR.sub.2 comprising a semiconductor channel forming region Ch.sub.2, a third conductive gate G.sub.3, and third and fourth conductive layers L.sub.3, L.sub.4, wherein the fourth conductive layer L.sub.4 is connected to the second conductive gate G.sub.2, the first conductive gate G.sub.1 and the third conductive gate G.sub.3 are connected to a first memory-cell-selection line, the first conductive layer L.sub.1 and the third conductive layer L.sub.3 are connected to a second memory-cell-selection line, the second conductive layer L.sub.2 is connected to a fixed potential, and the semiconductor channel forming region Ch.sub.2 is connected to a read/write selection line.
摘要:
A forced air cooling apparatus having a blower for blowing air taken in from an intake surface or inlet of the blower to be blown against an electronic device in an installation wherein the blower is mounted for operation on a casing or a rack, and in which the apparatus has a flow regulating plate vertically intersecting the intake surface that is installed immediately before the intake surface. With this construction, eddy air current flow in the vicinity of the intake surface is prevented and the cooling ability obtained from the blower is optimized to thereby attain the effect that the electronic devices can be efficiently cooled without requiring the same separation distance between an intake surface of the blower and a wall surface of the frame or casing in which the blower is installed, as compared with a conventional installation of the same equipment in the same casing without the flow regulating plate.
摘要:
A light intensity deterioration detecting circuit which includes a photodiode which receives light from a laser diode and having a cathode connected to a power supply and an anode connected to a first end of a resistor. A reference current source is connected between the power supply and a first input of a comparator which has the first input connected to a first end of a resistor and a second input connected to the first end of the resistor, and which compares a comparison voltage provided at the first end of the resistor and a comparison voltage provided at the second end of the resistor to output an output voltage on the basis of the comparison result. Errors of a resistance ratio are reduced to a negligible level if relatively large errors are produced in individual resistances, thus correctly detecting deterioration of a current to light output characteristic of the laser diode without an offset control.