Abstract:
An injection molding die for producing a molded product having an appearance surface, an injection molding method for producing a molded product having an appearance surface, and a resin molded product molded by the injection molding method which is free from occurrence of appearance deficiency such as a flow mark or the like that is a drawback in appearance. A molten thermoplastic resin material is injected into a cavity defined by a molded product's appearance surface forming portion (4a) and a molded product's rear surface forming portion (6a) through one or more direct gates and one or more hot runners to fill the cavity with the molten resin material, thereby performing injection molding.
Abstract:
A hydraulic power transmission is provided with a frictional engagement element as a lock-up clutch between a hydraulic power transmission chamber, housing a pump impeller and a turbine runner, and a servo oil chamber of the lock-up clutch. A lock-up oil passage that supplies lock-up hydraulic pressure to the servo oil chamber is connected to a hydraulic pressure supply circuit that is used in common with a circulation oil passage that supplies hydraulic pressure for circulation to the hydraulic power transmission chamber. An orifice is disposed in the circulation oil passage. It is thus possible to perform lock-up with different supply pressures. A common oil supply for the lock-up oil passage and the circulation oil passage is provided, for example, by disposing a converting circuit that adapts an oil passage connection to hydraulic transmissions with different types of lock-up clutches.
Abstract:
A lattice-like delay circuit is configured wherein a plurality of logic gate circuits which are respectively provided with impedance elements for respectively coupling two input signals inputted to first and second input terminals and respectively form output signals obtained by inverting the input signals inputted to the first and second signals, are used so as to be disposed in lattice form in a first signal transfer direction and a second signal transfer direction. In the lattice-like delay circuit, input clock signals are successively delayed in the first signal transfer direction and thereafter inputted to the respective logic gate circuits extending from the first to the last as seen in the first signal transfer direction. Output signals are obtained from output terminals of a plurality of logic gate circuits placed in at least a plural-numbered stage as seen in the second signal transfer direction and arranged in the first signal transfer direction.
Abstract:
A testing circuit using ALPG is mounted in a testing board in which sockets for mounting semiconductor memories as devices to be tested in the board is mounted and a volatile memory for storing a data table for generating a random pattern is provided in the testing circuit so that a test using a test pattern having no regularity is performed using the data table in addition to a test using a test pattern having regularity generated by the ALPG.
Abstract:
The conventional semiconductor element testing equipment is arranged to position each probe accurately and need a burdensome operation for fixing, and includes only a limited number of electrode pads and chips to be tested at a batch. An equipment for testing a semiconductor element is arranged to keep each of electrode pads formed on a semiconductor element to be tested in direct contact with each of probes formed on a first substrate composed of silicon, one of electric connecting substrates disposed in the equipment. On the first substrate, each probe is formed on a cantilever and a wire is routed from a tip of each probe along a tip of the cantilever to the electrode pad formed on an opposite surface to the probe forming surface through an insulating layer.
Abstract:
A double-acting hydraulic actuator structure for use in an automatic transmission has a two-layered structure which includes first and second frictional engagement element hydraulic actuators. The first hydraulic actuator includes a drum member and a first piston fitted hermetically and slidably in the drum member. The second hydraulic actuator is formed by the interior of the first piston and a second piston fitted hermetically and slidably mounted within the first piston. The first and second pistons are both urged toward their disengaged positions by the action of a common return spring. A second spring is provided for urging the second piston alone against the force of the return spring.
Abstract:
A hydraulic power transmission is provided with a frictional engagement element as a lock-up clutch between a hydraulic power transmission chamber, housing a pump impeller and a turbine runner, and a servo oil chamber of the lock-up clutch. A lock-up oil passage that supplies lock-up hydraulic pressure to the servo oil chamber is connected to a hydraulic pressure supply circuit that is used in common with a circulation oil passage that supplies hydraulic pressure for circulation to the hydraulic power transmission chamber. An orifice is disposed in the circulation oil passage. It is thus possible to perform lock-up with different supply pressures. A common oil supply for the lock-up oil passage and the circulation oil passage is provided, for example, by disposing a converting circuit that adapts an oil passage connection to hydraulic transmissions with different types of lock-up clutches.
Abstract:
A semiconductor inspecting apparatus having a plurality of electrical connection boards arranged in the inspecting apparatus and a plurality of probes respectively provided on a plurality of beams formed on a first board of said plurality of electrical connection boards, the probes being adapted to be individually brought into contact with a plurality of electrode pads of a semiconductor device for inspection, so as to inspect the semiconductor device while establishing electrical connection therebetween. A one-end supported beam is used as each of the beams, and each of the probes is formed at a portion shifted in a rectangular direction to a center line of a longitudinal direction of the one-end supported beam.
Abstract:
A semiconductor inspection apparatus which is possible to inspect a plurality of semiconductor devices collectively at one time, which has conventionally been difficult because of precision or the like of probes. A method of manufacturing the semiconductor inspection apparatus comprises the steps of forming a cover film on a surface of the silicon substrate and forming a plurality of probes of a polygonal cone shape or a circular cone shape through etching after patterning by photolithography, after the cover film is removed, again forming a cover film on the surface of the silicon substrate and forming a beam or a diaphragm for each probe through etching after patterning by photolithography, after the cover film is removed, again forming a cover film on the surface of the silicon substrate and forming a through hole corresponding to the probe through etching after patterning by photolithography, and after the cover film is removed, forming an insulating film on the surface of the silicon substrate, forming a metal film on a surface of the insulating film, and forming a wiring lead through etching after patterning by photolithography.
Abstract:
Semiconductor device chips manufacturing and inspecting method is disclosed in which a semiconductor wafer is cut into individual LSI chips. The LSI chips are rearranged and integrated into a predetermined number. The cut LSI chips are integrated in a jig having openings with a size commensurate with the dimensions of the LSI chip. At least one part of the jig having such openings has a coefficient of thermal expansion that is approximately equal to that of the LSI chips. The integrated predetermined number of chips are subjected to an inspection process in a subsequent inspection step thereby improving efficiency and reducing cost.