摘要:
Normal column selection signal switching device (20) is provided to switch a signal outputted from normal column selection signal generating device (19) in response to a test-mode signal (TMC1). Even if the normal column selection signal generating device (19) outputs a signal to disable a normal column decoder (3), the normal column selection signal switching device (20) switches the signal to enable the normal column decoder (3) to operate in the test operation. Having this configuration, a semiconductor memory device enables writing of data into all the normal memory cells even after some of the normal memory cells are replaced by spare memory cells.
摘要:
A guide wire includes a first wire located at the distal end of the guide wire, a second wire located at the proximal end of the guide wire and having a flexural rigidity greater than that of the first wire, and a tubular connector for joining the first and second wires. The connector has one or more grooves or slits formed on the distal side of the boundary between the first wire and the second wire. The connector is formed of a material different from the material of the first wire. The proximal portion of the first wire is provided with a thin metal coating. The first wire is joined to the connector by brazing at the portion provided with the thin metal coating.
摘要:
In a method of fabricating a semiconductor device, an interlayer insulating film is selectively etched to remove a level difference at an area of the interlayer insulating film on a cell plate on cylindrical capacitors and simultaneously form a concave portion on a fuse portion. Since the etching is ended to a degree that the cell plate is not exposed, the concave portion can be formed on the fuse portion not exposed. This does not add a step of forming a protection film on the fuse portion.
摘要:
Normal column selection signal switching device (20) is provided to switch a signal outputted from normal column selection signal generating device (19) in response to a test-mode signal (TMC1). Even if the normal column selection signal generating device (19) outputs a signal to disable a normal column decoder (3), the normal column selection signal switching device (20) switches the signal to enable the normal column decoder (3) to operate in the test operation. Having this configuration, a semiconductor memory device enables writing of data into all the normal memory cells even after some of the normal memory cells are replaced by spare memory cells.
摘要:
An electrophotographic photoreceptor is disclosed. The photoreceptor has an interlayer and a photosensitive layer provided on a conductive support, in which the interlayer comprising: an alkoxy metallic chelate compound of titanium or aluminum having a chelate group of acetoacetic ester or .beta.-diketone; and a silane coupling reagent having an organic functional group, the end of which is methacryloxy or amino group. A method of forming an electrophotographic image is also disclosed.
摘要:
A semiconductor memory device includes a first conductivity type well in a first conductivity type semiconductor substrate surrounded by a second conductivity type well, one of a memory cell and an external input circuit arranged on the first conductivity type well and the other disposed outside the second conductivity type well. A predetermined power supply voltage is applied to the second conductivity type well and the first conductivity type well is connected to ground. In the structure, charge carriers injected from the external input circuit are absorbed in the second conductivity type well. As a result, the charge carriers are prevented from reaching the memory cell and destroying data stored therein. Therefore, it is possible to miniaturize transistors and increase integration density of dynamic random access memory devices without degrading the source to drain dielectric strength.
摘要:
In a tandem mill system, at least one first type rolling mill is arranged in the upstream side and at least one second type rolling mill is arranged in the downstream side. The first type rolling mill is of the so-called work roll crossing mill in which a pair of work rolls are inclined with respect to a pair of back-up rolls supporting the work rolls and simultaneously crossed each other in a horizontal plane to control transverse thickness distribution of a strip. The second type rolling mill is of the so-called HC mill which controls the strip crown and shape by a combination of axial movement of intermediate rolls and work roll bending. Such an arrangement makes it possible to increase a capability of controlling the strip crown and shape, particularly, a capability of correcting the quarter buckle, and eliminate a fear of causing scratches on the strip and roll surfaces, with the result of improved production efficiency. Plural lines of lubricant supply device are also provided to stop supply of a lubricant immediately before biting of the strip into the work roll crossing mill and start the supply again after the biting. A system of lubricating the work roll crossing mill is thereby improved.
摘要:
To eliminate a vertically asymmetrical deflection, a rolling mill comprises a device for measuring horizontal deflections of upper and lower work rolls 2, 3 during rolling, a device for comparing values measured on the upper and lower sides and calculating the difference therebetween, and a horizontal deflection controller four determining whether the difference exceeds a predetermined range or not and imparting a horizontal bending to at least one of the work rolls. To eliminate a transversely asymmetrical deflection, a rolling mill comprises a device for measuring horizontal deflections of at least one of the work rolls at axially spaced positions during rolling, a device for comparing values measured on at the axially spaced positions and calculating the difference therebetween, and a horizontal deflection controller for determining whether the difference exceeds a predetermined range or not and imparting a horizontal bending to the one work roll at least one of the axially spaced positions. This prevents an adverse effect by the work rolls being horizontally deflected in a vertically or transversely asymmetrical way, reduces the diameter of the work rolls, and increases the allowable rolling load. Stable rolling of high-quality strips with good shape or flatness is thus achieved.
摘要:
Disclosed is an output buffer circuit for allowing a reduction in overshoot and undershoot without a decrease in output speed of an output signal. This output buffer circuit includes a PMOS transistor and an NMOS transistor complementarily connected to each other, an impedance increasing circuit connected in parallel to PMOS transistor, and an impedance increasing circuit connected in parallel to NMOS transistor. Impedance increasing circuit increases output impedance in accordance with an increase in voltage on an output node of a CMOS circuit. Impedance increasing circuit increases output impedance in accordance with a decrease in voltage on output node of the CMOS circuit.
摘要:
A rolling mill for rolling metal strip moving in a horizontal rolling direction, has work rolls which engage the strip and are supported vertically by backup rolls through which drive is applied. The work rolls are supported in the horizontal rolling direction by support rollers contacting them at locations confined to intermediate regions between the work regions and bearings. The work rolls are shiftable in the horizontal rolling direction. To provide control of the horizontal forces during rolling, there are position control means for the support rollers operable to move and locate the support rollers so as to shift the work rolls to a predetermined location at which the vertical axial plane of the work rolls is offset in the horizontal rolling direction from the vertical axial plane of the backup rolls. The support rollers maintain the work rolls at the predetermined location during rolling.