Abstract: A method for manufacturing a cofired multi-layer piezoelectric transformer device includes forming first and second green shapes of a sinterable ceramic composition and applying metallization layer therebetween. Upon cofiring, the composite structure comprises first and second electroactive members bonded together by a conductive layer therebetween. External electrodes are applied and the electroactive members are polarized in a thickness direction, between their two major faces. The first and second electroactive members are arranged such that deformation of one electroactive member results in corresponding deformation of the other electroactive member. The device provides substantial transformation ratios in which relatively high power may be transferred in relation to the size of the unit, operability over wide input and output frequency bandwidths, and electrical isolation of the input voltage and current from the output voltage and current.

Abstract: An EAS marker and method of manufacturing same. In a preferred embodiment, the EAS marker comprises a rigid bottom piece of molded plastic having the shape of an open rectangular box. An elongated resonator is disposed in the bottom piece, the resonator being bowed downwardly about its longitudinal axis. A rigid separator of molded plastic is positioned over the open top of the bottom piece, thereby loosely encasing the resonator in the bottom piece. The foregoing bottom piece, resonator and separator are all positioned within the cavity of a rigid top piece of molded plastic having the shape of an inverted open rectangular box, the separator being press-fit against the interior surface of the top wall of the top piece, the bottom piece being press-fit against the interior surfaces of the side walls and end walls of the top piece. The top wall of the top piece is provided with a recessed area in which a biasing element is disposed, the biasing element being retained in the recessed area by the separator.

Abstract: A method for improving the coupling of an acoustic window or lens to a RFI shield by modifying the surface of the shield to promote adhesion. The surface of the shield can be chemically modified with an epoxy and/or mechanically modified by creating an unsmooth top surface.

Abstract: A bi-layer encapsulation system for a planar acoustic wave device, e.g., a SAW device, employs a layer of controlled particles to contact the active surface of the SAW device, and another layer to lock the first layer in place. A back surface of the device is bonded to a supporting substrate, e.g., a ceramic backing. The particles may be glass microspheres of a nominal 50 micron size. A layer of microspheres cover the acoustically active area of the device. Then, an epoxy or other suitable potting material covers the glass microspheres and bonds to the device and to the supporting substrate. The glass spheres may be solid glass or balloon-like microspheres filled with nitrogen or another gas. A second layer of glass microspheres may be applied over the first layer and around the edges of the first layer. This layer may contain an appropriate B-stage epoxy or a commercially available syntactic foam material. A plurality of devices can be packaged and encapsulated together while in wafer form.

Abstract: A method for manufacturing a magnetic head apparatus includes a step of forming a plurality of flexure pieces coupled with each other and kept in substantially flat, each of the flexure pieces being provided with conductive connection pattern, a step of mounting sliders with magnetic head elements on the respective flexure pieces, or mounting head IC chips on the respective flexure pieces and after that mounting sliders with magnetic head elements on the respective flexure pieces, and a step of separating the flexure pieces with the sliders into individual pieces.

Abstract: The encapsulated transducer (10) includes an injection molded encapsulation (20) having a front end (22) and a back end (24). The encapsulation (20) ensconces a sensing element (40) proximate the front end (22) and a portion of a cable (60) which extends from the back end (24). The sensing element or coil (40) is electrically and mechanically connected to the cable (60) by a pair of suitably sized front and rear ferrules (80), (90) secured to a center and coaxial conductor (66), (70) of the associated cable (60) thereby forming a coil and cable assembly (110). At least the rear ferrule (90) includes a shoulder (100) for firmly anchoring the coil and cable assembly (110) within the encapsulation (20). In addition an injection molding process provides the durable encapsulation (20) which bonds with a dielectric (68) of the cable (60) and symmetrically locks the coil and cable assembly (110) therein.

Abstract: Magnetic materials which are divided into a plurality of blocks or divided corresponding to respective magnetic pole teeth are connected by means of thin portions. The respective magnetic pole teeth are wound continuously with wire without cutting the wire at the positions in which the thin portions are connected. When a stator is assembled, a plurality of blocks or magnetic pole teeth are disposed on a substrate by separating or bending the thin portions.

Abstract: A slider producing method in which a slider bar is lapped from the side of a base to the side of a thin-film element of a slider, in a fixed direction substantially perpendicular to the slider bar. Thereafter, the slider bar is polished by making it reciprocate in a direction perpendicular to the lapping operation, whereby smears are removed. The slider producing method makes it possible to prevent, in the lapping process of a slider, the formation of a stepped portion between a rail and the thin-film element of the slider, and the occurrence of a short circuit at each of the element layers of the thin-film element.

Abstract: A suspension includes a resilient flexure for supporting a magnetic head slider near its one end, and a load beam with a base end portion, for supporting the flexure. Particularly, connection conductors are formed on the flexure in a thin film pattern, and one ends of the connection conductors are to be connected to the magnetic head slider and the other ends of the connection conductors are positioned near the other end of the flexure. The other end of the flexure extends to at least a position of the base end portion of the load beam.

Abstract: A method for manufacturing a commutator adapted to be mounted on a shaft of an electric motor for cooperation with electrical contacts of the motor, wherein a support member is molded from an electrically insulating material, the support member having a major outer surface portion divided into subsections of lesser area by a plurality of rib members extending upwardly from the outer surface portion. A sheet of electrically conductive material with minimum waste, is cut into commutator segments of predetermined shape and dimensions preferably by a stamping process for attachment to the outer surface portions of the subsections. The commutator segments are then adhesively attached to the outer surface portions of the subsections such that the segments form commutator surfaces interrupted by the rib members, with the upper surface of each segment being slightly higher than the upper surface of each of the adjacent rib members.

Abstract: A method of producing a transponder (20) comprising the following steps: demarcating the various turns (8) of a coil in a sheet (1), including a dielectric substrate covered by at least one conducting layer (2), by stamping said conducting layer with a stamping die (5) having sharp-edged surfaces (6) for contact with the superficial conducting layer (2; 2"'), connecting at least one electronic component (25) to the turns (8), and mounting at least one protective sheet (22; 27) covering the coil and the electronic component (25). To facilitate the stamping and to obtain clean incisions, the conducting layer is covered, before stamping, with a synthetic film. To prevent short circuits over the incisions, the incisions are preferably filled in with an adhesive, varnish or lacquer.

Abstract: A disk drive recording device comprises at least two platters for storing magnetic recording data and a spindle motor rotating at high speed for mounting the platters. The disk drive is assembled by using pushing devices to push the platters toward the center of the spindle motor in respective directions to bring a portion of an inside circumference of a concentric center hole of each of the platters in contact with an outer circumference of the spindle motor so that the center of gravity of each platter coincides with a center axis of the spindle motor.

Abstract: A magnetic head is provided that has an extremely small first shield layer and first and second leads of a read head that extend from a magnetoresistive (MR) sensor to first and second pads without any vias therebetween. This is accomplished by patterning the first shield layer into its final shape before the first gap layer and subsequent layers are formed. An alumina mask with a recess at the ABS of the size of the first shield layer is formed followed by forming the first shield layer in the recess. A very thin first gap layer and an optional supplemental first gap layer are then formed, the supplemental first gap layer insulating any potential exposure of the first shield layer at its junction with the alumina layer. After constructing the MR sensor, first and second leads for the MR sensor are constructed from the MR sensor to sites of the first and second pads.

Abstract: A process for producing a dielectric filter by bonding coaxial dielectric resonators of predetermined size as arranged side by side. The process comprises forming interstage coupling windows by removing an outer conductor layer from the same region of each of adjoining surfaces of the resonators to be adjacent to each other, and bonding the resonators as arranged side by side in proximity to each other on a smooth-surfaced table with an electrically conductive bonding material applied to at least one of the outer conductive layers remaining on the adjoining surfaces.

Abstract: A chip inductor of a sealed type having a square-shaped winding comprises a bobbin for winding, which has a square-shaped flange on its both ends, and a metal terminal sticking out from the outer side surface of each respective flange and each respective metal terminal being bent inside each respective flange upward so as to stick out to the upper side surface of the flange, also have the foregoing metal terminal further bent along the upper side surface of the flange, and further make insert-molding of the foregoing bent terminal possible to form the bobbin for winding.

Abstract: A vibrating gyro which includes a vibrator formed by joining two piezoelectric substrates, which are polarized in opposite directions, by a metal layer. Electrodes are formed on the main outer surfaces of the piezoelectric substrates. One of the electrode is split into six electrode portions. As the metal layer, a material having a melting point lower than the Curie point of the piezoelectric substrates is used. Cut portions are formed on the joining sides of the piezoelectric substrates, and high-temperature metal wires or the like are passed through the cut portions, thereby forming support members.

Abstract: A multipole brushless DC motor stator is formed with a pair of complementary opposable claw pole stator structures in which each of the stator structures comprises a stator base formed of a plurality of stacked sheet metal laminations. A plurality of stator pole members extend from the stator base and are formed by compression molding of a ferromagnetic material. In one form, the ferromagnetic material is molded in situ on the stator base by positioning the stator base in a compression mold having the slots in which a powdered or flaked ferromagnetic material can be positioned and compressed by a die. In another form, the ferromagnetic pole members may be independently compression molded of powdered or flaked ferromagnetic material and then adhesively bonded to the stacked laminations forming the stator base. In either method, the stacked laminations are formed with a plurality of receptacles for receiving one end of each of the stator poles and holding the stator poles to the stator base.

Abstract: An apparatus for merging magnetized magnet segments to form a composite magnet for assembly in a voice coil motor for a disc drive. The apparatus includes first and second magnet segment nests for removably supporting magnetized magnet segments for assembly. The magnet segment nests are supported for operation between first and second positions. In the first position, the first and second magnet segment nests are spaced and in the second position, the first and second magnet segment nests are located in close proximity to merge first and second magnet segments.

Abstract: An actuator structure includes a flexure suspension with a flag appendage having a cantilevered portion extending parallel to the arm-suspension to form a gap therebetween. The flex cable that connects to the device electronics has an elongated portion secured to the side of the arm-suspension assembly presenting termination pads, which extend to the cable edge, along the elongated portion side and in alignment with the gap between arm-suspension and flag. The leads extending from the transducer are fanned out and extend across the gap. The leads are bonded to the arm-suspension and to the lead cantilevered portion immediately adjoining the gap. To terminate the leads, the flag is folded down 90 degrees, bringing the leads into contact with the te nation pads where they are ultrasonically bonded. The flag is then bent toward its original position causing the fine lead wires to separate between the flag cantilever portion bond and the ultrasonically bonded termination.

Abstract: A resonator device having an insulating substrate, a strip-shaped vibrating element which is mounted on said insulating substrate and is provided with driving electrodes formed on the main opposing surfaces of a piezoelectric substrate, and terminal electrodes which are provided on said insulating substrate so as to be electrically connected with said driving electrodes and to which driving signals are applied by an external signal source. At least the longitudinal side portions of said vibrating element are coated with a surface active agent. With such a constitution, fluctuations in resonant resistance which are due to the excitation level can be suppressed, thereby contributing to the stable operation of the device, reducing the number of producing steps, and raising the yield rate in production.