Abstract: A magnetic detection device includes a mode switching section capable of switching over a 1-output mode in which a (+) magnetic-field detected signal and a (?) magnetic-field detected signal are both outputted from a first external output terminal, and a 2-output mode in which the (+) magnetic-field detected signal and the (?) magnetic-field detected signal are outputted respectively from the first external output terminal and a second external output terminal. The provision of the mode switching section in an integrated circuit makes it possible to perform mode selection, in particular to realize the mode selection with a simple circuit configuration resulting in a reduction of the production cost.

Abstract: A magnetic detection device of a NS detection type is provided. A magnetic detection device comprising a first series circuit, a second series circuit, and a third series circuit. At least one of a plurality of resistance elements forming the first series circuit includes a first magneto-resistance element using a magneto-resistance effect, of which an electric resistance varies with an external magnetic field of any one direction. At least one of a plurality of resistance elements forming the second series circuit includes a second magneto-resistance element using a magneto-resistance effect, of which an electric resistance varies with an external magnetic field of a direction apposite to the one direction.

Abstract: A magnetic detection device capable of reducing current consumption includes a second series circuit connected in parallel to a first series circuit. The first series circuit includes a first magneto-resistance element, and a third series circuit 30 includes a second magneto-resistance element. The second series circuit includes fixed resistance elements. Electric resistance of the fixed resistance elements is larger than those of respective resistance elements included in a sensor unit, thereby reducing current consumption.

Abstract: Provided is a capacitive acceleration sensor including a silicon substrate, which includes a movable electrode having a comb shape and a fixed electrode having a comb shape opposed to the comb shape of the movable electrode, and a pair of glass substrates having a concave portion forming a cavity on at least one side thereof, wherein the silicon substrate and the glass substrates are bonded to each other so that the movable electrode and the fixed electrode is disposed in the cavity. Accordingly, it is possible to provide the capacitive acceleration sensor having a small size and high sensitivity.

Abstract: A pressure sensor includes a gold-silicon eutectic crystal layer interposed between the contact layer and the silicon substrate. Because the contact layer and the silicon substrate are electrically connected to each other by using a gold-silicon eutectic reaction at the time of bonding the silicon substrate and the glass substrate, a contact resistance between the contact layer and the silicon substrate can be stabilized, and a Q value of the sensor can be stabilized. In addition, since the contact layer and the silicon substrate are bonded to each other by the gold-silicon eutectic reaction, the bonding strength is sufficient.

Abstract: A capacitive pressure sensor and method of manufacturing the same is provided. The capactive pressure sensor includes a glass substrate that has a pair of surfaces opposite to each other. A recessed portion is provided to form a cavity on one of the pair of principal surfaces. A first protruding portion provided in the recessed portion. A first silicon substrate has a fixed electrode formed on the first protruding portion, and a movable electrode disposed with a predetermined interval between the fixed electrode and the movable electrode.

Abstract: A capacitive pressure sensor is provided. The capacitive pressure sensor includes a glass substrate that has a pair of surfaces facing each other. A first silicon substrate has a fixed electrode passing through the glass substrate to be exposed at one surface and a projection passing through the glass substrate to be exposed at the one surface. A second silicon substrate is bonded to the one surface of the glass substrate and is disposed to face the fixed electrode so as to form a cavity between the second silicon substrate and the fixed electrode.

Abstract: A magnetic head includes a first shielding layer, a second shielding layer, an MR element, and a marker layer. The layers and the element are exposed from a medium sliding surface while being inclined at an azimuth angle. A major part of the marker layer is disposed inside two imaginary azimuth lines, which extend straight in one direction through both end portions in the track-width direction of the MR element, in the track-width direction, and both end portions thereof are disposed outside the imaginary azimuth lines in the track-width direction. In the magnetic head, the MR height can be precisely controlled, and changes in asymmetry are reduced.

Abstract: A magnetic head in which two sides, which are defined as viewed in a core width direction, of first, second, and third end surfaces of a magnetic recording head extend along a longitudinal direction of recording tracks, so that it is possible to reduce spreading of leakage magnetic field extending from the two sides of the magnetic recording head in the core width direction between an upper core layer and a lower core layer protrusion through a gap layer. If the leakage magnetic field extending from both sides of the gap layer is reduced, it is possible to prevent the formation of an erased area beyond a multiple recording area. It is possible to maintain the S/N ratio of a reproduction signal at a proper value when reading out magnetic information from a magnetic tape.

Abstract: A multichannel magnetic head assembly includes a head container having thin-film magnetic heads therein. Each of the thin-film magnetic heads includes a gap layer and a pair of core layers, and leading end portions of the gap layer and the core layers are exposed from a medium-sliding surface. The thin-film magnetic heads are disposed inside the head container so that the widths thereof in the track-width direction are inclined at the same azimuth angle. A pair of trimming recesses provided on the medium-sliding surface include edge lines extending on both sides in the track-width direction of the gap layer and the core layers and in the traveling direction of the thin-film magnetic head. The magnetic head assembly maintains a high S/N ratio of reproduction signals, and reduces errors in the relative positions among the thin-film magnetic heads.

Abstract: A magnetic recording apparatus includes first magnetic recording elements and second magnetic recording elements. The first magnetic recording elements precede the second magnetic recording elements. The second magnetic elements record signals to form second signal tracks between wide signal tracks previously formed by the first magnetic recording elements by recording signals so that the second signal tracks partly overlap the first signal tracks on both sides of the second signal tracks.

Abstract: A magnetic head includes a first shielding layer, a second shielding layer, an MR element, and a marker layer. The layers and the element are exposed from a medium sliding surface while being inclined at an azimuth angle. A major part of the marker layer is disposed inside two imaginary azimuth lines, which extend straight in one direction through both end portions in the track-width direction of the MR element, in the track-width direction, and both end portions thereof are disposed outside the imaginary azimuth lines in the track-width direction. In the magnetic head, the MR height can be precisely controlled, and changes in asymmetry are reduced.

Abstract: A thin-film magnetic head assembly includes a core block, a magnetoresistive element disposed adjacent to an insulating layer inside the core block, a base plate on which the core block is mounted, an insulating junction substrate mounted on at least one surface of the base plate, and lines connecting the magnetoresistive element to terminals disposed on the junction substrate. The relationship CPWB/CMR<1.5 is satisfied, wherein CMR is the capacitance of the core block including the magnetoresistive element, and CPWB is the capacitance of a section including the junction substrate and the base plate.

Abstract: First and second embodiments of thin-film magnetic heads each including a magnetoresistive element for reading out information as a result of moving relative to a magnetic recording medium. Each thin-film magnetic head includes a base, a lower shield layer that is formed on the base, a lower insulating layer, the magnetoresistive element, an upper insulating layer which is formed on the magnetoresistive element, and an upper shield layer. In order to make uniform the separation between each upper shield layer and its corresponding lower shield layer in the vicinity of its corresponding magnetoresistive element, a middle insulating layer is formed in the same film plane as its corresponding magnetoresistive element.

Abstract: A magnetic head in which two sides, which are defined as viewed in a core width direction, of first, second, and third end surfaces of a magnetic recording head extend along a longitudinal direction of recording tracks, so that it is possible to reduce spreading of leakage magnetic field extending from the two sides of the magnetic recording head in the core width direction between an upper core layer and a lower core layer protrusion through a gap layer. If the leakage magnetic field extending from both sides of the gap layer is reduced, it is possible to prevent the formation of an erased area beyond a multiple recording area. It is possible to maintain the S/N ratio of a reproduction signal at a proper value when reading out magnetic information from a magnetic tape.

Abstract: A magnetic recording/reproducing apparatus includes first magnetic heads including at least two magnetic reproducing elements disposed at a first azimuth angle, and second magnetic heads including at least two magnetic reproducing elements disposed at a second azimuth angle. The first and second magnetic heads are mounted to a rotating drum. The magnetic reproducing elements of the magnetic heads scan at the same time recording tracks formed by recording signals at the same azimuth angle, with an odd number of at least three recording tracks being disposed between the recording tracks that are scanned.

Abstract: A magnetic recording/reproducing apparatus includes a servo head amplifier, including first and second signal processors, comparator circuit, and tape speed controller. The first signal processor processes a first signal read from first servo device into a third signal, and the second signal processor processes a second signal read from second servo device into a fourth signal. The comparator circuit compares the third and fourth signals. If a signal output difference exists, the tape speed controller changes the magnetic tape transport speed, so that a signal is recorded to form a signal track with constant width. Therefore, it is possible to provide a magnetic head capable of stably recording signals to form signal tracks with constant width using servo technology, a magnetic recording apparatus including the magnetic head, and a magnetic recording/reproducing apparatus which can stably record signals to form signal tracks with constant width and restrict variations in reproduction signals.

Abstract: A magnetic head and a manufacturing method for the same are provided. An abutting plane is formed on a first core, and the abutting plane is butted to a bonding surface of a second core. This allows the first core and the second core to be brought partly into surface contact with each other, and the abutting plane to be planarly machined with high accuracy. Hence, the planar bondability of the first core and the second core can be improved, and the bonding strength can be uniformly enhanced.

Abstract: A thin film magnetic head includes a head element portion stacked on a side surface of a substrate having two opposed planes, two opposed side surfaces intersecting the planes, and a tape slide surface provided at one end portion of the planes and the side surfaces. At least one of a magnetic gap Gb of an induction type magnetic head and a magneto-resistive effect element Ga of a magneto-resistive effect type magnetic head are exposed on the tape slide surface, and a bonding pad 3 is connected to the head element portion, wherein an angle made by one of the side surfaces on which the head element portion and the bonding pad are provided and one of the planes constitutes an azimuth angle.

Abstract: A thin film magnetic head that is ready for positioning of the elevation of the MR layer and most suitable for high density recording to be used for the helical scan type magnetic recording and reproducing apparatus, comprising a lower shield layer formed on a substrate, a lower gap layer formed on the upper shield layer, a magnetoresistive layer formed on the lower shield layer via the lower gap layer, an upper gap layer formed on the magnetoresistive layer, and an upper shield layer formed on the magnetoresistive layer via the upper gap layer, besides providing a convex portion on the principal face of the upper shield layer.