Abstract:
The present invention is to provide a positive tab lead capable of being connected with each other with a sufficient connection strength at a low energy cost. It is constituted such that a partial coating layer (13) made of nickel, tin or solder is formed on at least a part of a region of an aluminum plate (11) exposed to an outside of an outer cover. It is preferable to form a chitosan layer (14) containing one or more compounds selected from the group consisting of chitosan and chitosan derivatives on the surface of the tab lead.
Abstract:
An aluminum foil to be etched for use as the electrolytic condenser electrodes is composed of a foil body of an aluminum purity of 99.9% or higher, and an oxide layer 20-70 .ANG. thick and formed due to contact of the foil body with an oxidizing atmosphere. At least one etching nuclei-forming element is concentrated in a boundary region and/or in an outermost surface region of the oxide layer, the boundary region being disposed between the foil body and the oxide layer, and both the regions having a thickness of 20 .ANG. or less. The ratio in ion intensity of a maximum concentration of the elements in these regions to a concentration of the elements in the inner layer of the foil body is 1.2-30. There are three patterns in distribution of the elements, so that the maximum concentration is in a predetermined ratio to the concentration in the surface region, the inner layer or a minimum concentration appearing between the regions. The foil will be etched to be ready for use as the electrolytic condenser electrodes.
Abstract:
Aluminum foils used as a material of electrodes in electrolytic capacitors are manufactured by a method which comprises a step of forming at first an initial internal oxide coating 5 to 50 .ANG. thick on the surface of the aluminum foils before they are electrochemically or chemically etched later. The aluminum foils are then subjected to high temperature heat treatment such that the whole thickness of the oxide coating does not exceed 70 .ANG..
Abstract:
An inquiry system is provided for detecting the location of a selected object. The system comprises an answering device having its own identifying address which responds to a detecting command. An answering device is provided on each object to be selected. The detecting command is transmitted from a controller device which communicates with the answering devices through the use of an address.
Abstract:
A receiver side of a two-wire type remote control system accurately determines the polarity of data. The reception buffer inverts an input from one of the data and electric communication lines, and adds the inverted input to an input of the other line. Then, when the result of the addition is 0 or close to 0, the reception switches buffer logic data to be output to indicate the inversion of the level of the equilibrium pulse-like power received from the communication lines. The polarity identifying portion identifies the polarity when the logical data sent from the reception buffer is maintained at a logic level for a predetermined period of time. The polarity identifying portion sends pulse group data to the data processing portion in accordance with the identified polarity.
Abstract:
The present invention provides an abrasive composition for polishing magnetic recording disk substrates that results in a low surface roughness of the magnetic recording disk, allows the attaining of high-density recording without the occurrence of protrusions or polishing scratches, and enables polishing to be performed at an economical speed. The present invention discloses an abrasive composition for polishing magnetic recording disk substrates comprising water, silicon dioxide, antigelling agent, aluminum nitrate and hydrogen peroxide.
Abstract:
The present invention is to provide a positive tab lead capable of being connected with each other with a sufficient connection strength at a low energy cost. It is constituted such that a partial coating layer (13) made of nickel, tin or solder is formed on at least a part of a region of an aluminum plate (11) exposed to an outside of an outer cover. It is preferable to form a chitosan layer (14) containing one or more compounds selected from the group consisting of chitosan and chitosan derivatives on the surface of the tab lead.
Abstract:
The wiring case has a detachable display device for displaying contents of data and electric transmission/reception communications established with a predetermined controlling device. In the display device, a pair of wiring members are prepared. The tip end portions of the wiring members are directed towards the bottom surface portion of the wiring case, and the each tip end portion has a contact point. The wiring case has an opening at a section opposing to the bottom surface portion, and a stopper portion is formed at end portion of each of sidewalls of the long-scale box.
Abstract:
A magnetic hard disc substrate made of an aluminum alloy for memory devices such as a computer must correspond to an improved structure in which the interval between a head and a medium is made narrower to attain high density recording. In order to prevent head crash, it is required that the magnetic hard disc substrate have a smooth surface and decreased defects. The present invention provides a process for manufacturing a magnetic hard disc substrate made of an aluminum alloy which satisfies the above requirements and also provides a disc substrate which has a surface roughness Ra≦0.5 nm and is free from abrasive flaws with a depth of 5 nm or more and from micro-waviness or provides a disc substrate which has a surface roughness Ra≦5 angstroms and a surface roughness Rmax≦80 angstroms and in which the number of scratches with a depth of 50 angstroms or more is 5 or less and the number of pits with a depth of 50 angstroms or less is 5 or less in the surface.
Abstract:
Magnetic disk substrates are produced by subjecting glass substrates to at least steps of degreasing, etching, sensitization with tin chloride, activation and sensitivity-enhancing treatment in that order, then plating the pretreated substrates with a nickel/phosphorus film, and thereafter polishing the plated substrates. In the process, the substrates being processed are washed with hot pure water at a temperature of not lower than 50° C. for a period of from 20 to 90 seconds, after the sensitization step but before the activation step, and heated at a temperature of not lower than 70° C. for a period of from 5 to 100 minutes, after the sensitization step but before the nickel/phosphorus-plating step.