摘要:
A tape cassette has a magnetic tape wound and housed in a casing, the magnetic tape having a magnetic recording layer in the form of a ferromagnetic thin metal film. The tape cassette has a trap layer disposed near a portion of the magnetic tape. The trap layer is made of a resin having at least an amino group or an amide group. Even when the tape cassette is used in harsh environments in the presence of corrosive gases, the trap layer adsorps corrosive gases which have entered the tape cassette, thereby protecting the magnetic tape against deterioration.
摘要:
A method of manufacturing a magnetic recording medium includes providing a substrate that is a magnetic recording medium substrate having a disc shape, having two main surfaces, and having defined therein a center hole; holding the center hole of the substrate from both main surfaces with two holding members that each have a disc shape to hold the substrate and to cover at least the periphery of the center hole adjacent to the two main surfaces of the substrate; and applying resist liquid simultaneously to both main surfaces of the substrate using spin coating to form a resist layer simultaneously on both main surfaces while maintaining the periphery of the center hole immediately adjacent to the two main surfaces of the substrate resist-free as an unapplied portion. The method enables efficient formation of uniform resist layers without defects on both faces of the substrate.
摘要:
A method for manufacturing a circuit board on which an electronic component is mounted, includes at least the steps of (a) supplying a liquid photo-polymerizable adhesive containing conductive particles dispersed therein to a surface of a printed board, to form an adhesive layer on the board surface; (b) irradiating the photo-polymerizable adhesive with ultraviolet light to turn into a gel, to provide adhesiveness to the adhesive layer; and (c) pressing the electronic component against the component mounting portion of the printed board from an upper surface side of the adhesive layer, to form an electrical connection between the electronic component and the component mounting portion, and in the method, the photo-polymerizable adhesive is a delayed reactive adhesive.
摘要:
Based on information indicating the signal transmission amount between the first and second circuit blocks, a switching device switches an optical signal communication form which uses a first and second optical signal transmitting/receiving devices and an electric signal communication form which uses a first and second electric signal transmitting/receiving devices. Thereby, in a portable information terminal apparatus with a separate main body operation unit and a separate screen display unit, power consumed by the optical signal communication can be suppressed.
摘要:
A press-molding die comprises a base material, an intermediate layer formed on a surface of the base material and a protective layer formed on the intermediate layer. The base material comprises an inorganic oxide. The intermediate layer comprises a material that adheres to both the base material and the protective layer and is heat resistant at high temperatures wherein the die is used. The protective layer comprises at least one metal film selected from the group consisting of tungsten (W), platinum (Pt), palladium (Pd), rhodium (Rh), ruthenium (Ru), iridium (Ir), osmium (Os), rhenium (Re), tantalum (Ta) and alloys thereof.
摘要:
A substrate connecting member connects two circuit boards connected together while maintaining high reliability of the junctions between itself and the circuit boards even if the circuit boards are warped by temperature change of an impact load. The substrate connecting member includes a frame member made of an insulating resin; slit grooves formed in at least one of the inner and outer surfaces of frame side portions composing the frame member, the slit grooves being formed throughout the entire length of the frame side portions in the direction perpendicular to the thickness direction of the frame side portions; and connection conductor portions having connection terminals provided on the top and bottom surfaces, respectively, of the frame side portions in the thickness direction and connecting conductors each connecting connection terminals.
摘要:
A method of manufacturing a glass substrate for a storage medium by pressing a glass material between an upper and a lower dies. The method includes a heating step of heating the glass material arranged between the upper and lower dies, a pressing step of pressing the heated glass material via the upper and lower dies, and a cooling step of having, after the pressing step, a cooling member contact the upper and lower dies to cool them together with the molded glass material arranged between the upper and lower dies. During the heating step and the pressing step, a vacuum atmosphere is maintained in a space containing the dies and the glass material. When the pressing step has completed, an inert gas is filled in the space to set a pressure in the space equal to an ambient pressure.
摘要:
An optical waveguide includes a first cladding, a second cladding, and a core. The core is embedded in the first cladding so as to be exposed on one principal surface of the first cladding that is opposed to the second cladding. The first cladding and the second cladding are arranged so as to sandwich the core. The core is a product formed by a reaction in which a polymeric material that includes branched polysilane and polysiloxane is subjected to at least one process selected from heating and ultraviolet irradiation. The refractive index of the core is higher than the refractive indices of the first cladding and the second cladding.
摘要:
A magnetic recording medium comprises steep mountain-shaped protrusions having heights ranging 50-600 .ANG. and distributed at a rate of 1.times.50.sup.5 -1.times.10.sup.8 protrusions/mm.sup.2 on a surface of ferromagnetic metal layer and further thereon a lubricant layer; the magnetic recording medium is suitable for VTR tape which has a satisfactory durability for repeated use and eliminates head clogging and squealing.
摘要:
A method of manufacturing a magnetic recording medium includes providing a substrate that is a magnetic recording medium substrate having a disc shape, having two main surfaces, and having defined therein a center hole; holding the center hole of the substrate from both main surfaces with two holding members that each have a disc shape to hold the substrate and to cover at least the periphery of the center hole adjacent to the two main surfaces of the substrate; and applying resist liquid simultaneously to both main surfaces of the substrate using spin coating to form a resist layer simultaneously on both main surfaces while maintaining the periphery of the center hole immediately adjacent to the two main surfaces of the substrate resist-free as an unapplied portion. The method enables efficient formation of uniform resist layers without defects on both faces of the substrate.