摘要:
A replaceable gang head machine tool including a machine base, a working unit thereon, plural gang heads on the periphery of the working unit, and an index table on the upper side of the working unit, further including a supporting base positioned above the machine tool, a stock apparatus mounted on the supporting base comprising a center support, plural gang heads on the periphery of the center support, and an index table on the upper side thereof; and a replacing apparatus positioned away from the machine tool and the stock apparatus extending between the machine tool and the stock apparatus for effecting a replacement between the gang heads on the machine tool and the gang heads on the stock apparatus.
摘要:
A transfer type working system including a transfer line for intermittently conveying workpieces thereon. The transfer line has plural stages of working stations disposed in front and rear relationship. Each of the working stations has at least one machine tool for working on one of the workpieces on that station. Each of the machine tools comprises a ganghead replaceable machine tool having plural gangheads arranged to be selectively operable. Each of the working stations has, at a preceding position thereof, a front sensor for reading the kind of workpiece on a preceding position so that, in the course of conveying any of the workpieces to each of the working stations, one of the gangheads that corresponds to the kind of workpiece read is previously selected for operation by a signal obtained at the front sensor.
摘要:
An apparatus for driving an index table which includes a first shaft, an index table rotatably mounted on the first shaft having grooves therein forming a Geneva gear and a mechanism for driving the table in rotation including a drive motor, a second shaft driven by the motor, a crank mounted on the second shaft, and a Geneva pin mounted on the crank. The grooves have force bearing walls which include straight portions and sector portions. The Geneva pin is engaged in the grooves in the table to effect stepwise rotation of the table to equispaced, predetermined angular positions. The second shaft and the grooves are spaced from each other such that the distance from the axis of the second shaft to the circumferential surface of the pin is less than the distance from the axis of the shaft to the straight portions of the force bearing walls of the grooves. The sector portions of the force bearing walls of the grooves are recessed such that the distance from the axis of the second shaft to the circumferential surface of the pin is equal to the distance from the axis of the second shaft to the sector portions of the force bearing walls of the grooves. Thus the circumferential surface of the pin transfers from bearing against the walls of the straight portion to bearing against the walls of the recessed sector portion prior to the index table finishing rotation to one of the predetermined angular positions. The index table thereafter completes rotation to the predetermined angular position powered solely by its inertia.
摘要:
In an integrated circuit comprising an IIL and a high frequency npn bipolar transistor which has a deep p.sup.- -type base region 45 for its inverted npn output transistors, circuit elements such as a resistor part R, a capacitor part C, a diode part D and an isolated crossing connection part Cr are provided with deep p.sup.- -type regions 54, 54', 65', 71 and 82 which are formed at the same time with the p.sup.- -type region 45 in the IIL, and thereby, reliability of the circuit elements as well as characteristic thereof are improved, thereby further improving manufacturing yields.
摘要:
A memory array divided into a plurality of sub-memory-arrays is disposed on a chip so that, if a specified sub-memory-array is selected by a sub-memory-array selecting circuit, a normal read/write operation is performed with respect to the sub-memory-array based on an address indicated by a group of external address signals. At the same time, a clock generator for self-refresh mounted on a chip generates a word-line basic clock for self-refresh and a word-line basic clock for refresh, thereby selecting the word lines in the sub-memory-arrays which have not been selected. Prior to a predetermined time at which the sub-memory-array subjected to a refresh operation is subsequently selected, a refresh halt signal is outputted so as to forcibly halt the refresh operation, thereby preventing insufficient recharging of a memory cell. Each of the plurality of sub-memory-arrays stores, of sequential sets of image data, data on one frame or one field.
摘要:
A visible telephone includes a housing in which a video camera is accommodated in a manner that an aperture thereof is directed to the front. The camera is fixed to a rotatable holder which is rotated by an operation of a knob outside the housing, responsively, an angle of declination or elevation of the aperture of the camera is changed. The camera includes a lens system and a solid-state image sensor which converts a light image from the lens system into an electrical signal (video signal), which is mounted on a circuit board. The solid-state image sensor is responsive to at least an infrared light. On the same or the other circuit board, an infrared LED is mounted. The infrared LED is lightened at necessary timing to expose a person or subject in the front of the aperture of the camera.
摘要:
A machine tool comprises an upstanding column, a tool-driving unit vertically movable on the column, and a pair of guide rails on a front surface of the column to extend vertically thereon and horizontally spaced apart from each other for guiding the upward and downward movement of the tool-driving unit. The tool-driving unit includes a lift frame on the guide rails and a tilting-type turret head which is supported on a front surface of the lift frame and is rotatable about an axis inclined relative to the longitudinal direction of the frame in a horizontal plane. One of the pair of guide rails is relatively disposed forwardly of the other guide rail, so that the individual guide rails both assume positions close to the turret head thereby to minimize the amount of overhang of the tool-driving unit.
摘要:
The invention provides a method for manufacturing a semiconductor device, wherein a semiconductor substrate is vertically etched to form a groove, antioxidant insulating films are formed on the side walls of the groove, and local oxidation is performed. Lateral extrusion of an oxide film which is a so-called bird's beak and a projection of the oxide film which is a so-called bird's head are substantially eliminated. As a result, the active region of the transistor, that is, the element formation region may not be narrowed, providing high packing density and high precision. Furthermore, the surface of the semiconductor substrate is flattened to prevent short-circuiting and disconnections of wiring layers. Stable manufacturing process provides a high yield of the semiconductor device. Electrical characteristics of the semiconductor device are greatly improved.
摘要:
A photoconductive film comprises a first region containing Se in which Te and an element capable of forming deep levels in Se are added at concentrations lower than 10 atomic % inclusive on average, respectively, a second region disposed on the first region and containing Se in which Te is added with a continuous distribution of concentration having a peak value greater than 15 atomic % inclusive, a third region disposed on the second region and containing Se in which an element capable of forming deep levels in Se is added with a continuous distribution of concentration having a peak value greater than 15 atomic % inclusive, and a fourth region disposed on the third region and containing Se in which Te and an element capable of forming deep levels in Se are added at concentrations lower than 10 atomic % inclusive on average, respectively.
摘要:
According to one embodiment, a substrate processing method is disclosed. The above method includes: grinding an outer edge portion on a back surface of a semiconductor wafer with a semiconductor element formed on its front surface with a first grindstone or blade to thereby form an annular groove; grinding a projecting portion on an inner side of the groove with a second grindstone to thereby form a recessed portion integrally with the groove on the back surface of the semiconductor wafer; and grinding a bottom surface of the recessed portion including a ground surface made by the second grindstone with a third grindstone.