Abstract: An optical pickup is provided with a limiting wall spaced a predetermined distance apart from a screw shaft to limit the separation of an interlocking projection away from the screw shaft, so that the interlocking projection cannot be disengaged from the helical groove of the screw shaft and, consequently, the screw shaft becomes unable to rotate. This state in which the screw shaft is unable to be rotated, i.e., a state where the optical pickup has bee moved to its inner limit position, can be detected through the detection of a change in the coil current of a stepping motor by a coil current measuring means or through the detection of the increase of voltage induced by the rotation of the magnet of the stepping motor to a predetermined level on the basis of the measured coil current measured by the current measuring means.

Abstract: A coordinate input device comprises a column-shaped body erected on a base, a plurality of sensors produced in a film form, a flexible cable for leading out sensor signals from the sensors, and a transparent heat-shrinkable tube. In this coordinate input device the sensors are affixed with a thermosetting resin on the side surfaces of the column-shaped body; and the tube is put on the sensors and then heated for shrinking, thereby pressing to affix the sensors on the side surfaces of the column-shaped body with the thermosetting resin and also covering the surfaces of the sensors. Then the cap is mounted on the top of the column-shaped body and the tube is fitted in a recess section inside the cap.

Abstract: A tablet that hardly causes the fluctuation in the sheet resistance on a film substrate despite the small size of the tablet. The edge of one side of the film substrate requiring a notch for connector insertion are provided with other notches having the same depth as that of the notch for connector insertion, thereby notching most of the edge to the same depth.

Abstract: The present invention relates to multilayered filter films, and in particular, a multilayered filter film not having a substrate and a method for making the same. The method for making the multilayered filter film not having a substrate includes a step for forming a filter frame layer having a window on the substrate, a step for forming a multilayered film on the substrate inside the window and on the filter frame layer, and a step for removing the substrate from the filter frame layer and the multilayered film.

Abstract: A light-emitting module has a laser diode (LD) held on an LD holder, and a lens contained in a lens barrel held on a lens holder. The LD holder and the lens holder are combined so that the optical axis of a laser beam emitted by the laser diode is aligned with the optical axis of the lens. The lens holder is provided in its outlet portion with an aperture to adjust the fiber-side NA of the lens to 0.08 or below. Thus, the laser beam can be focused on an inlet end surface of an optical fiber in a spot of a relatively great diameter.

Abstract: A combined-type thin film magnetic head in which a reproducing head portion including a magnetoresistive device and an inductive magnetic head are laminated. A coil support portion made of the same plated layer that forms an upper gap layer of the reproducing head portion having the magnetoresistive device and a lower core portion separated from the magnetic material layer by a gap .delta. are formed on the surface of the upper gap layer. The coil support portion and the lower core portion have areas that enable a coil layer to be formed so that the coil layer is enabled to be formed on a region having no step. An upper core layer is formed on the lower core portion in such a manner that the coil layer is held therebetween. A magnetic gap is formed between the two core layers. Since the magnetic passage of the lower core portion has a small cross sectional area, the inductance of the magnetic circuit can be lowered.

Abstract: A magnetic recording/reproducing device including a top cover having a plurality of leg portions 1e with cutouts that project from each side face of the top cover such that the location of a leg portion at one side face does not correspond to the location of a leg portion at the other side face; and a bottom cover having a plurality of retaining portions 2e in correspondence with the leg portions 1e at each side face of the lower cover formed by bending portions of the side faces. The top cover and the bottom cover are integrally engaged together by fitting the retaining portions into the cutouts of their corresponding leg portions. A plurality of top covers are successively press-cut from a metal plate such that a leg portion of a particular top cover is positioned between the leg portions of another top cover that is adjacent to the particular top cover, thus reducing the amount of scraps produced from the metal plate.

Abstract: A liquid crystal color display device comprises a liquid crystal cell 3 having a liquid crystal layer with an angle of twist being within a range of 180.degree. to 270.degree. and a pair of electrode substrates intervening the liquid crystal layer therebetween, a twist phase plate 4 serving as a birefringent layer, and a pair of polarizers 2,5. The value of .DELTA.n.cndot.d of the phase plate 4, wherein .DELTA.n represents a refractive index anisotropy and d represents a thickness, and that of the liquid crystal layer in voltage-free condition are substantially at the same level within a range of 1.4 to 2.0 .mu.m. The value of .DELTA.n.cndot.d of the liquid crystal layer can be continuously changed by appropriately controlling a voltage applied thereto. By this, colorization of the device is possible.

Abstract: A giant magnetoresistive material film includes at least two ferromagnetic layers of a NiFe alloy or NiFeCo alloy, which are formed on a substrate through a nonmagnetic layer of Au, Ag, Cu or Cr, wherein magnetization of at lest one of the ferromagnetic layers is pinned by a coercive force increasing layer of .alpha.-Fe.sub.2 O.sub.3 provided adjacent thereto and having a thickness of 200 to 1000 .ANG. so as to increase coercive force of the ferromagnetic layer, and the other ferromagnetic layer has free magnetization so as to produce a change in resistance at a low magnetic field. The present invention also provides a method of producing the giant magnetoresistive material film and a magnetic head provided with the giant magnetoresistive material film.

Abstract: A invention relates to a disk medium and a method of writing data onto the disk medium. The disk medium is formatted in such a manner that: there are provided a plurality of track zones formed into segments of concentric circles separated from each other in radial directions of the disk; a plurality of servo areas are formed along lines which are located at intervals of substantially equal angle and which extend from the center of the disk toward the outer periphery across the track zones; the plurality of track zones each include a plurality of sector areas each provided with a data area; and the length (in bytes) of the data area in each sector area is varied depending on the track zone's location on the disk medium so that no servo area is located within any of data areas.

Abstract: A reflection liquid crystal display device which comprises a display substrate and a back substrate each having an electrode, and disposed in spaced opposition to each other; a liquid crystal layer which is provided between the display substrate and the back substrate, and composed of nematic liquid crystal to which dichromatic dye is added; a reflector plate provided on the back substrate; and a quarter-wave plate provided between the reflector plate and the liquid crystal layer. In the liquid crystal display device, twist pitch P of the liquid crystal and the distance d between the substrates satisfy the following expression:1/4.ltoreq.d/P<3/4.

Abstract: An Fe-based soft magnetic alloy having a high saturated magnetic flux density and having a composition represented by formula (I) below:(Fe.sub.1-a Q.sub.a).sub.b B.sub.x T.sub.y T'.sub.z (I)wherein Q represents at least one element selected from the group consisting of Co and Ni; T represents at least one element selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Mo and W, with Zr and/or Hf being always included; T' represents at least one element selected from the group consisting of Cu, Ag, Au, Ni, Pd and Pt; a, b, x, y and z are real numbers satisfying relationships below:0.ltoreq.a.ltoreq.0.05,0.ltoreq.b.ltoreq.93 atomic %,0.5.ltoreq.x.ltoreq.16 atomic %,4.ltoreq.y.ltoreq.10 atomic %,0.ltoreq.z.ltoreq.4.5 atomic %provided that when 0<z.ltoreq.4.5 atomic %, Q represents Co and 0<b.ltoreq.92 atomic %; and when z=0, 0.5.ltoreq.x.ltoreq.8 atomic % and 4.ltoreq.y.ltoreq.9 atomic %.

Abstract: The present invention provides a resist developing method and apparatus which achieves high in-plane uniformity and high reproducibility of resist pattern accuracy and low consumption of developer. The resist developing method sprays developer on a patterned resist formed on a substrate while rotating the substrate at high speed, drips the developer on the resist while rotating the substrate at low speed, and then, stops the substrate to hold the developer on the surface of the resist. The resist developing apparatus has a rotating substrate holder whose rotation speed is variable, a nozzle for supplying developer onto a substrate, and a device for supplying the developer to the nozzle. The nozzle includes a spray nozzle and a drip nozzle.

Abstract: A pin contact of a connector and a method of fabricating the pin contact which enables a substantial decrease of manufacturing cost, and smooth installation of the pin connector without a change in the pitch of arrangement at the time of press-fitting into a pin housing. A flat metal sheet undergoes blanking and pressing to form a narrow piece including a strip portion of decreased area of a fracture. Then an approximately L-shaped connecting portion is bent at right angles to raise the narrow piece sideways. Thereafter the strip portion of the narrow piece is pressed along the direction of rising, to thereby form an approximately cylindrical contact section. A raised piece at the rear of the contact section is provided with a locking section which faces approximately at right angles with the direction of arrangement.

Abstract: A stepping motor driver drives, for example, a stepping motor incorporated into an optical recording/reproducing apparatus to move an optical pickup in the radial direction of an optical disk during a seek operation. A current measuring device measures a current flowing through the stepping motor, and a control circuit changes the excitation phase of the stepping motor on the basis of the variation of the current detected by the current measuring device.

Abstract: The present invention relates to an optical waveguide device, particularly a structure for positioning end faces of an optical waveguide and end faces of optical fibers with respect to each other, as well as a method of realizing such a structure. V grooves for positioning optical fibers are formed on a glass substrate by hot pressing, and the optical fibers are put in the V grooves to position end faces of the optical fibers and end faces of an optical waveguide with respect to each other, thereby forming the optical waveguide device of the invention.

Abstract: A pin contact of a connector and a method of fabricating the pin contact which enables a substantial decrease of manufacturing cost, and smooth installation of the pin connector without a change in the pitch of arrangement at the time of press-fitting into a pin housing. A flat metal sheet undergoes blanking and pressing to form a narrow piece including a strip portion of decreased area of a fracture. Then an approximately L-shaped connecting portion is bent at right angles to raise the narrow piece sideways. Thereafter the strip portion of the narrow piece is pressed along the direction of rising, to thereby form an approximately cylindrical contact section. A raised piece at the rear of the contact section is provided with a locking section which faces approximately at right angles with the direction of arrangement.

Abstract: A switching device which can be changed into a lock type switching device, or a non-lock type switching device with the least number of replacement components is disclosed. The switching device includes: first and second fixed contacts mounted in parallel on the bottom of a base; first and second contact pieces which are pivotally arranged on the first and second fixed contacts, and which can be in contact with the first and second fixed contacts, respectively; a lever pivotally supported by the base; two driving rods which are elastically held in the lever in a removable manner, and whose tips slide on the first and second movable contact pieces, respectively, while being in contact therewith; and a locking member which is replaceable with the first movable contact piece (or the second movable contact piece 21), and having a convex cam surface formed on the upper surface thereof with which one of the driving rods slidably comes into contact.

Abstract: A position sensor for a throttle valve, the position sensor including a housing having a partition wall separating an attachment chamber and a sensor accommodating chamber, each of which include an outer opening. The partition wall defines a central opening. The housing is connected to a case of the throttle valve such that the outer opening of the attachment chamber is closed by the throttle valve case. A drive shaft of the throttle valve is connected to a driven shaft mounted in the attachment chamber, the driven shaft being rotatably supported on the partition wall. A sliding-element receiver is located within the accommodating chamber and is connected through the central opening in the partitioning wall to the driven shaft. The driven shaft and the sliding-element receiver cooperate to close the central opening of the partition wall. A insulating substrate is disposed within the accommodating chamber opposite to the sliding-element receiver.

Abstract: A magnetic head device includes a magnetic head, a mount on which the magnetic head is provided, and first and second pairs of tape guides. The first tape guides are provided on the mount at positions approximately adjacent to and on opposite sides of the magnetic head. The second tape guides are provided on the mount at positions separated from the magnetic head such that one of the first tape guides is positioned between each of the second tape guides and the magnetic head. The mount is formed of a high-accuracy material, and the first and second tape guides are formed of materials having low friction properties which include portions molded into holes provided in the high-accuracy material to form an integral unit. The inner wall of one of the projections of each of the first tape guide is formed as a perpendicular surface and the inner wall of the other projection of each of the first tape guides is formed as an inclined surface.