Abstract: A racetrack-shaped apparatus for generating a magnetic field on a target surface for magnetron sputtering, comprising on a magnetic base (a) a vertically magnetized center permanent magnet arranged straight; (b) vertically magnetized peripheral permanent magnets surrounding the center permanent magnet; (c) vertically magnetized first intermediate permanent magnets, horizontally magnetized second intermediate permanent magnets and vertically magnetized third intermediate permanent magnets arranged on both sides of the center permanent magnet; and (d) vertically magnetized fourth intermediate permanent magnets arranged separately from both longitudinal ends of the center permanent magnet; each second intermediate permanent magnet being arranged with one magnetic pole opposing a near-target side surface portion of each first intermediate permanent magnet.

Abstract: A voice coil motor includes a disk-shaped lower yoke, three columnar pole yokes provided on one surface of the lower yoke, a integrally molded ring-shaped bonded magnet having three hole portions into which the pole yokes are inserted, an upper yoke having three hole portions into which the pole yokes are inserted at positions circumferentially aligned with the hole portions of the ring-shaped bonded magnet, three cylindrical coils into which the respective poles yokes are inserted, and a coil support supporting the coils. The ring-shaped bonded magnet is configured such that parts of the outer surfaces of the three ring magnets equally placed in a circumferential direction are integrally joined.

Abstract: A racetrack-shaped apparatus for generating a magnetic field on a target surface for magnetron sputtering, comprising on a magnetic base (a) a vertically magnetized center permanent magnet arranged straight; (b) vertically magnetized peripheral permanent magnets surrounding the center permanent magnet; (c) vertically magnetized first intermediate permanent magnets, horizontally magnetized second intermediate permanent magnets and vertically magnetized third intermediate permanent magnets arranged on both sides of the center permanent magnet; and (d) vertically magnetized fourth intermediate permanent magnets arranged separately from both longitudinal ends of the center permanent magnet; each second intermediate permanent magnet being arranged with one magnetic pole opposing a near-target side surface portion of each first intermediate permanent magnet.

Abstract: A racetrack-shaped magnetic-field-generating apparatus for magnetron sputtering comprising a linear portion and corner portions, the linear portion comprising a magnetic base, a center permanent magnet disposed on its surface, and side permanent magnets disposed on both sides thereof with a gap; the center and side permanent magnets being vertically magnetized with opposite polarities; the corner portions comprising a non-magnetic base, a center magnetic pole member disposed on its surface, a semicircular or semi-polygonal, peripheral magnetic pole member, and plural permanent magnets arranged between both magnetic pole members with their magnetization directions in parallel to a target surface; and the magnetic poles of plural permanent magnets opposing the center magnetic pole member having the same polarity as those of the center permanent magnet opposing the target.

Abstract: A racetrack-shaped magnetic-field-generating apparatus for magnetron sputtering having a linear portion and corner portions, which comprises a center magnetic pole member; a peripheral magnetic pole member surrounding the center magnetic pole member; pluralities of permanent magnets arranged between the center magnetic pole member and the peripheral magnetic pole member to have magnetic poles aligned in one direction; and a non-magnetic base member supporting them; permanent magnets arranged in at least the linear portion being inclined with their surfaces on the side of the center magnetic pole member lower, and with their outside magnetic pole surfaces not in contact with the peripheral magnetic pole member in lower portions; the distance between the center magnetic pole member and the target being the same as the distance between the peripheral magnetic pole member and the target, thereby generating a uniform magnetic field on a target surface.

Abstract: A racetrack-shaped magnetic-field-generating apparatus for magnetron sputtering comprising a straight portion and corner portions, which comprises, on a non-magnetic base, (a) a straight center magnetic pole member; (b) a peripheral magnetic pole member surrounding the center magnetic pole member; (c) pluralities of vertical permanent magnets arranged between the center magnetic pole member and the peripheral magnetic pole member, which are magnetized in a perpendicular direction to the target surface; and (d) pluralities of first and second horizontal permanent magnets arranged on both sides thereof, which are magnetized in parallel to a target surface; the magnetic poles of the first and second horizontal permanent magnets opposing the vertical permanent magnets being the same in polarity as those of the vertical permanent magnets opposing the target surface.

Abstract: A voice coil motor for moving a correction lens including a magnet unit having a pair of yokes and at least one permanent magnet for defining a magnetic gap, and a coil disposed in the magnetic gap. The permanent magnet having different magnetic poles adjacent to each other along the movement direction on a surface opposing the magnetic gap; the width of the permanent magnet in the movement direction being two times the width Wm of the magnetic poles; the width Wa of the coil in the movement direction being smaller than the width 2Wm of the permanent magnet; and the effective conductor width Wb of the coil, the magnetic pole width Wm of the permanent magnet and the longest movement distance St of the correction lens meeting the conditions of Wm=(Wb+St)×K, wherein K is a constant meeting 1<K?1.5.

Abstract: A racetrack-shaped magnetic-field-generating apparatus for magnetron sputtering having a linear portion and corner portions, which comprises a center magnetic pole member; a peripheral magnetic pole member surrounding the center magnetic pole member; pluralities of permanent magnets arranged between the center magnetic pole member and the peripheral magnetic pole member to have magnetic poles aligned in one direction; and a non-magnetic base member supporting them; permanent magnets arranged in at least the linear portion being inclined with their surfaces on the side of the center magnetic pole member lower, and with their outside magnetic pole surfaces not in contact with the peripheral magnetic pole member in lower portions; the distance between the center magnetic pole member and the target being the same as the distance between the peripheral magnetic pole member and the target, thereby generating a uniform magnetic field on a target surface.

Abstract: A racetrack-shaped magnetic-field-generating apparatus for magnetron sputtering comprising a linear portion and corner portions, the linear portion comprising a magnetic base, a center permanent magnet disposed on its surface, and side permanent magnets disposed on both sides thereof with a gap; the center and side permanent magnets being vertically magnetized with opposite polarities; the corner portions comprising a non-magnetic base, a center magnetic pole member disposed on its surface, a semicircular or semi-polygonal, peripheral magnetic pole member, and plural permanent magnets arranged between both magnetic pole members with their magnetization directions in parallel to a target surface; and the magnetic poles of plural permanent magnets opposing the center magnetic pole member having the same polarity as those of the center permanent magnet opposing the target.

Abstract: A voice coil motor for moving a correction lens comprising a magnet unit comprising a pair of yokes and at least one permanent magnet for defining a magnetic gap, and a coil disposed in the magnetic gap, to cause the relative linear movement of the magnet unit and the coil by current supplied to the coil; the permanent magnet having different magnetic poles adjacent to each other along the movement direction on a surface opposing the magnetic gap; the width of the permanent magnet in the movement direction being two times the width Wm of the magnetic poles; the width Wa of the coil in the movement direction being smaller than the width 2Wm of the permanent magnet; and the effective conductor width Wb of the coil, the magnetic pole width Wm of the permanent magnet and the longest movement distance St of the correction lens meeting the conditions of Wm=(Wb+St)×K, wherein K is a constant meeting 1<K?1.5.

Abstract: A rotor has magnets segmented in a circumferential direction of a periphery of a shaft, wherein magnetizing directions of the segmented magnets continuously vary, and a non-magnetic material or a ferromagnetic material is interposed in a circumferential gap between the segmented magnets. Further, a method of manufacturing a rotor comprises steps of arranging coils so that a longitudinal direction of each of the coils is along an axis of the shaft and magnetizing the segmented magnets. Still further, a rotary machine uses the rotor.

Abstract: An magnetic-field-generating apparatus comprising permanent magnet segments arranged to form a ring-shaped magnetic circuit having a center hole; adjacent permanent magnet segments having such different magnetization directions that their magnetization directions successively change along a circumferential direction of the magnetic circuit; a basic magnetization phase angle ? between the magnetization directions of the adjacent permanent magnet segments being 720/N (°); and a magnetization direction of at least one permanent magnet segment in an essential unit obtained by circumferentially dividing the ring to ¼ being deviated from the basic magnetization phase angle ? by such a deviating angle that a uniform magnetic flux flows in one direction along a diameter of the center hole.

Abstract: An magnetic-field-generating apparatus comprising permanent magnet segments arranged to form a ring-shaped magnetic circuit having a center hole; adjacent permanent magnet segments having such different magnetization directions that their magnetization directions successively change along a circumferential direction of the magnetic circuit; a basic magnetization phase angle &thgr; between the magnetization directions of the adjacent permanent magnet segments being 720/N (°); and a magnetization direction of at least one permanent magnet segment in an essential unit obtained by circumferentially dividing the ring to ¼ being deviated from the basic magnetization phase angle &thgr; by such a deviating angle that a uniform magnetic flux flows in one direction along a diameter of the center hole.

Abstract: A heat-treating furnace with a magnetic field comprising (a) a magnetic field-generating means constituted by an outer, ring-shaped, permanent magnet assembly comprising a plurality of permanent magnet segments combined with their magnetization directions oriented such that a magnetic flux flows in a diameter direction, and an inner, ring-shaped, permanent magnet assembly disposed inside the outer, ring-shaped, permanent magnet assembly and comprising a plurality of permanent magnet segments combined with their magnetization directions oriented such that a magnetic flux flows in a diameter direction; and (b) a heat treatment means disposed in a center hole of the inner, ring-shaped, permanent magnet assembly and comprising a cooling means, a heating means, and a heat-treating container containing heat-treating holder for holding a plurality of articles to be heat-treated in this order from outside, wherein an axial center of a magnetic field generated by the inner and outer ring-shaped, permanent magnet assem

Abstract: The present invention provides a ring magnet made of hard magnetic material having a ring shape, which has an orientation ratio of 50% by volume or more of easy magnetization axis in the radial direction at the pole center position. The present invention also provides a method of manufacturing a ring magnet comprising a step of orientating magnetic powder of hard magnetic material, which comprises molding the magnetic powder filled in a ring shaped mold under a pressure in an axial direction of the ring, and applying magnetic field to the ring shaped mold with a magnetic field generating means disposed to the periphery of the mold.

Abstract: A rotor has magnets segmented in a circumferential direction of a periphery of a shaft, wherein magnetizing directions of the segmented magnets continuously vary, and a non-magnetic material or a ferromagnetic material is interposed in a circumferential gap between the segmented magnets. Further, a method of manufacturing a rotor comprises steps of arranging coils so that a longitudinal direction of each of the coils is along an axis of the shaft and magnetizing the segmented magnets. Still further, a rotary machine uses the rotor.

Abstract: A heat-treating furnace with a magnetic field comprising (a) a magnetic field-generating means constituted by an outer, ring-shaped, permanent magnet assembly comprising a plurality of permanent magnet segments combined with their magnetization directions oriented such that a magnetic flux flows in a diameter direction, and an inner, ring-shaped, permanent magnet assembly disposed inside the outer, ring-shaped, permanent magnet assembly and comprising a plurality of permanent magnet segments combined with their magnetization directions oriented such that a magnetic flux flows in a diameter direction; and (b) a heat treatment means disposed in a center hole of the inner, ring-shaped, permanent magnet assembly and comprising a cooling means, a heating means, and a heat-treating container containing heat-treating holder for holding a plurality of articles to be heat-treated in this order from outside, wherein an axial center of a magnetic field generated by the inner and outer ring-shaped, permanent magnet assem

Abstract: A voice coil motor including (a) an E-shaped yoke having a center yoke portion and side yoke portions and constituted by a plurality of thin plates having the same configuration and stacked together; (b) a counter yoke member secured to an open end of the yoke; (c) permanent magnets secured to inner sides of the side yoke portions such that the same magnetic poles are opposed; (d) a hollow, cylindrical, movable coil supported for movements along the center yoke portion; and (e) a covering made of a corrosion-resistant material and provided integrally on outer surfaces of the yoke and the permanent magnets.