Abstract: A solid electrolytic capacitor is manufactured by repeating a plurality of times a first step of immersing a substrate made of a valve metal whose surface is roughened and which is formed with an insulating oxide film in an ethylene dioxythiophene solution and a second step of bringing the substrate into contact with an oxidizing agent solution containing quadrivalent cerium salt at a concentration of 1% to 7% by weight so that the cumulative total time during which the second step is performed is shorter than five minutes, thereby forming a solid high molecular polymer electrolyte layer on the surface of the substrate.

Abstract: A multi-layer information medium which is less likely to be deflected and twisted is provided. Such medium is also provided at low cost. The optical information medium comprises a substrate or a pair of substrates, and at least two information-storing layers for storing recorded information and/or tracking servo information disposed on said substrate or between said pair of substrates, and at least one information-storing layer is recorded or read by the recording beam or the reading beam which has passed through other information-storing layer(s). In this medium, the medium has at least one cured intermediate layer comprising an active energy radiation-curable resin, and at least one of said cured intermediate layer(s) has a tensile elongation at break of 15 to 200% and a tensile modulus of 20 to 1,000 MPa.

Abstract: Provided are a thin film magnetic head capable of local minimization of a pole width with high accuracy, a method of manufacturing the same, and a method of forming a magnetic layer pattern, which is capable of forming a long, narrow magnetic layer pattern with high accuracy. A precursory magnetic layer is formed so that the layer has a greater width and an edge extending in a width direction of a rear edge portion of the layer forms a straight line, and then the precursory magnetic layer is selectively etched by RIE using as a mask a top magnetic layer (a first pole front end portion) formed on the precursory magnetic layer. The use of this method allows forming a second pole front end portion having a locally minimum uniform width (e.g., 0.1 &mgr;m) and a straight edge extending in a width direction of a rear edge surface.

Abstract: The invention allows a thin-film magnetic head that meets specifications required by the customer to be provided in a short period of time and manufacturing costs to be reduced. A slider of a magnetic head of the invention comprises two thin-film magnetic head element portions formed near an end face orthogonal to the direction of air flow. On the end face four pad-shaped electrodes are provided for electrically connecting the two head element portions to an external device. The electrodes are selectively connected to one of the head element portions through four conductors.

Abstract: There is provided a thin film magnetic head which can improve electromagnetic conversion characteristics and a method of manufacturing the same. A recording gap layer is formed on a lower magnetic pole layer. A stepped portion of a nonmagnetic material having an almost vertically formed end face at a side facing an ABS surface is formed on the recording gap layer. A space portion is formed at the end face. An upper magnetic pole layer magnetically connected to the lower magnetic pole layer to constitute a closed magnetic path is formed on the recording gap layer, the space portion, and the stepped portion. A thin film coil is formed between the upper and lower magnetic pole layers through an insulating layer. A side of the upper magnetic pole layer facing the space portion includes an inclined surface connecting the surface of the recording gap layer and the stepped portion.

Abstract: Reduction in noise of the read out signal as well as enhanced storage reliability are realized in an optical recording medium comprising a supporting substrate, and a reflective layer, a recording layer, and a light-transmitting substrate disposed on the supporting substrate in this order. The optical recording medium comprises a supporting substrate 20, and an intermediate layer 10 comprising an amorphous material, a reflective layer 5 comprising a polycrystalline material, a recording layer 4, and a light-transmitting substrate 2 disposed on the supporting substrate in this order. The write beam and the read beam are directed through the light-transmitting substrate 2.

Abstract: A magnetic recording medium for use in reproduction with an MR head, which comprises: a non-magnetic substrate; a non-magnetic layer including a binder resin having dispersed therein a non-magnetic powder on the non-magnetic substrate; and a magnetic layer on the non-magnetic layer, wherein the magnetic layer is obtained by applying a magnetic coating material on the applied, dried and cured non-magnetic layer, the magnetic layer includes a metal magnetic powder with a mean major axis length of from 0.03 to 0.08 &mgr;m, and a saturation magnetization &sgr;s of from 100 to 130 Am2/kg, and the center line mean roughness Ra of the magnetic layer surface is 5 nm or less.

Abstract: A contents providing system is provided with a server which stores two or more contents files, a 1st terminal device which issues a recording medium recorded with download permission information for permitting download of at least one of the contents files is recorded and a 2nd terminal device which reads the download permission information from the recording medium and transmits it to the server. The server permits download of the corresponding contents file among the two or more contents files based on the download permission information transmitted from the 2nd terminal device.

Abstract: An electroplated magnetic thin film consisting of an electroplated film of Fe—Co alloy containing Fe by an amount of 52-86 wt % and having a highly packed fine crystal grain structure, a flat and glossy surface, a high saturation magnetic flux density not less than 2.1 T, a low coercive force of 5-10 Oe, and being particularly suitable as a pole portion of a thin film magnetic head is proposed. The electroplated magnetic thin film is deposited on a substrate by an electroplating process with a pulsatory current or direct current having a current density of 3-120 mA/cm while using an electroplating bath containing one or both of sulfate salt and hydrochloric salt serving as supply sources of Fe ions and Co ions, saccharin sodium serving as a stress relaxation agent by an amount not less than 1 g/l, boric acid as a pH buffer agent, ammonium chloride as an electrically conductivity salt, and sodium lauryl sulfate as a surfactant.

Abstract: An embedded type optically irreversible circuit device which achieves both low insertion loss and high return loss is provided, in which an optical element, comprised of an incoming side polarizer, a Faraday rotator, and an outgoing side polarizer superposed in the order of mention in the direction of an optical path, is embedded in the optical path of an optical fiber or optical waveguide having an light axis, the device has a slot extending across the light axis in a direction slanted with respect to the light axis, the optical element is inserted in the slot and the spaces between the optical element and the incoming and outgoing sides of the slot are filled with an optical adhesive portion; and at least one of interfaces between the incoming side polarizer, the Faraday rotator, the outgoing side polarizer and the optical adhesive portions is inclined at an angle reversely from the plane normal to the light axis as viewed from the slanted incoming side of the slot.

Abstract: The present invention relates to a dielectric device that is suitable for miniaturization and height reduction and is surface-mountable. In a resonator unit Q1, a first hole 41 is provided to a dielectric substarate 1, extends from a surface 21 toward a surface 22 opposite thereto, opens in the surface 21, and has a first internal conductor 61 in the interior. A second hole 51 is provided to the dielectric substarate 1, opens in a surface 23 adjacent to the surface 21, extends from the surface 23 toward a surface 24 opposite thereto, and is connected with the first hole 41 in the interior of the dielectric substarate 1. The second hole 51 has a second internal conductor 81 in the interior, and the second internal conductor 81 is connected to the first internal conductor 61 in the interior of the dielectric substarate 1.

Abstract: An MR thin-film magnetic head includes a lower shield layer, an MR multilayer laminated on the lower shield layer, in the MR multilayer, a current flowing in a direction perpendicular to surfaces of layers of the MR multilayer, an upper gap layer made of a nonmagnetic electrically conductive material and laminated on the MR multilayer, an insulation gap layer made of insulation material and formed between the lower shield layer and the upper gap layer, and an upper shield layer laminated on the upper gap layer. A thickness of the insulation gap layer is larger than that of the upper gap layer.

Abstract: A magnetic recording medium comprises a non-magnetic substrate and a metal thin film magnetic layer formed by an oblique evaporating method on the substrate, the non-magnetic substrate being an aromatic polyamide film. The film has a thickness of 3.0 &mgr;m to 6.0 &mgr;m, has a Young's modulus in the transverse direction of 16000 MPa to 18000 MPa, and has a thermal contraction coefficient (in the transverse direction; 180° C. for 30 minutes) of 0.7% to 1.3%. With this structure, it has been found that the thermal deformation (cupping) after the thin film is formed can be prevented to improve head touch and the electromagnetic conversion properties.

Abstract: A thin-film magnetic head comprises first and second magnetic layers, a gap layer provided between the first and second magnetic layers, and a thin-film coil at least a part of which is disposed between the first and second magnetic layers. The second magnetic layer has a pole portion layer, a yoke portion layer, and a coupling portion. The yoke portion layer is magnetically connected to the rear end surface of the pole portion layer and both side surfaces of the pole portion layer in the width direction. The rear end surface of the pole portion layer and the side surfaces of the pole portion layer in the width direction are each inclined relative to the direction perpendicular to the surface of the pole portion layer that faces the gap layer.

Abstract: A magnetoresisive device comprises: an MR element having two surfaces that face toward opposite directions and two side portions that face toward opposite directions; two bias field applying layers that are located adjacent to the side portions of the MR element and apply a longitudinal bias magnetic field to the MR element; and two electrode layers that are located adjacent to one of the surfaces of each of the bias field applying layers and feed a sense current to the MR element. The electrode layers overlap the one of the surfaces of the MR element. The magnetoresistive device further comprises two nonconductive layers that are located between the one of the surfaces of the MR element and the two electrode layers and located in two regions that include ends of the MR element near the side portions thereof, the two regions being parts of the region in which the electrode layers face toward the one of the surfaces of the MR element.

Abstract: An SAW element 11 comprises a first wiring section 20 formed between an input terminal 18 and an output terminal 19, a plurality of first SAW resonators 15 which are located in serial to the first wiring section 20, a plurality of second SAW resonators 16 which are located in serial to the first wiring section 20 at the side of the input terminal 18 or at the side of the output terminal 19 with respect to the first SAW resonators 15, a plurality of second wiring section 22 which are formed between an intermediate point of the second SAW resonators 16 each other in the first wiring section 20 and a reference voltage electrode 21, and a plurality of third SAW resonators 17 which are located in the second wiring section 22, respectively, and which have anti-resonant frequencies corresponding with resonant frequencies of the second SAW resonators 16.

Abstract: An optical recording medium includes a recording layer and a dielectric layer formed in the vicinity of the recording layer and the dielectric layer contains an oxide as a primary component and being added with nitrogen. The thus constituted optical recording medium can exhibit excellent optical characteristics with respect to a laser beam of desired wavelength used for recording data and reproducing data.

Abstract: In a magnetic disk apparatus including a base, a magnetic head, a magnetic disk, and a spindle motor having a stator fixed to the base and a rotor for mounting the magnetic disk, a ramp road structure for parking the magnetic head is fixed to the stator.

Abstract: A HGA includes a magnetic head slider having at least one thin-film magnetic head element, an IC chip having a circuit for the at least one thin-film magnetic head element, and a suspension for supporting the magnetic head slider and the IC chip. All surfaces of the IC chip are coated by additional insulation layers.