WO2009113526A1 - 基板の法線方位の調整方法 - Google Patents
基板の法線方位の調整方法 Download PDFInfo
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- WO2009113526A1 WO2009113526A1 PCT/JP2009/054524 JP2009054524W WO2009113526A1 WO 2009113526 A1 WO2009113526 A1 WO 2009113526A1 JP 2009054524 W JP2009054524 W JP 2009054524W WO 2009113526 A1 WO2009113526 A1 WO 2009113526A1
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- WIPO (PCT)
- Prior art keywords
- substrate
- normal direction
- irradiated
- pulse laser
- spindle motor
- Prior art date
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B17/00—Guiding record carriers not specifically of filamentary or web form, or of supports therefor
- G11B17/02—Details
- G11B17/022—Positioning or locking of single discs
- G11B17/028—Positioning or locking of single discs of discs rotating during transducing operation
- G11B17/0282—Positioning or locking of single discs of discs rotating during transducing operation by means provided on the turntable
Definitions
- the present invention relates to a method for adjusting the normal direction of a substrate.
- the present invention is a method for adjusting the normal direction of a predetermined region of a substrate, and the background art will be described with an example in which this method can be specifically applied.
- the angle between the light emitting / receiving direction of the optical pickup unit and the rotation axis of the spindle motor is adjusted so that the angle formed between the light emitting / receiving direction of the optical pickup unit and the recording surface of the disc is a right angle (hereinafter referred to as “the spindle motor”). This adjustment is called skew adjustment).
- Japanese Patent Application Laid-Open No. 2002-373485 discloses a laser forming process in which a laser beam is irradiated to an appropriate position on a fixed frame in order to easily and accurately repair the parallelism of a disk mounting surface.
- Japanese Patent Laid-Open No. 2000-094164 discloses a method for adjusting the inclination of a shaft of a motor or the like. This is a method of adjusting the inclination of the shaft by plastic deformation at that time by irradiating a laser beam to the vicinity of the mounting base of the shaft attached to the support base, heating, melting, and cooling. is there.
- Japanese Patent Application Laid-Open No. 2007-317272 discloses a motor in which a relative position is adjusted by heating and deforming a heated region set on the outer periphery of a substantially flat displacement portion provided on a base portion. Has been. JP 2002-373485 A JP 2000-094164 A JP 2007-317272 A
- the amount of displacement may vary depending on the angle range of the irradiation region in laser beam irradiation, and further improvement in adjustment accuracy is desired.
- the shaft inclination adjusting method disclosed in Japanese Unexamined Patent Publication No. 2000-094164 is a method of adjusting the inclination of a press-fitted shaft, and the shaft is also heated and melted.
- An object of the present invention is to provide a method for adjusting the normal direction of a substrate using a laser.
- the present invention provides a method for adjusting the normal direction of a substrate capable of accurately adjusting the perpendicularity between the spindle motor base substrate and the rotation axis of the motor and the perpendicularity between the optical disk drive motor and the rotation axis. .
- the method for adjusting the normal direction of the substrate according to the present invention is as follows.
- the focused area is irradiated with a focused pulse laser to locally melt and cool the predetermined area.
- the method of adjusting the normal direction of the substrate changing the normal direction of the specific region, Within a predetermined region where the pulse laser is irradiated, a plurality of locations where the pulse laser is irradiated, In accordance with the direction in which the normal azimuth is changed, the center position and range of the predetermined area are determined, The amount by which the normal azimuth is changed is increased or decreased by increasing or decreasing the number of portions irradiated with the pulse laser in the predetermined region, The distribution density of the places to be irradiated with the pulse laser is increased when the number of the irradiated spots is increased, and is decreased when the number of the irradiated spots is decreased, The oscillation condition of the pulse laser is characterized by being substantially constant regardless of the direction and amount in which the normal direction is changed.
- the normal direction of a specific region of the substrate can be adjusted. If this adjustment method is applied to the adjustment of the axis inclination of the spindle motor or the optical disk motor, the perpendicularity between the base substrate and the rotating shaft can be adjusted with high accuracy.
- FIG. 1 is a schematic cross-sectional view showing an embodiment of a disk drive device.
- FIG. 2 is a top view of the traverse unit.
- FIG. 3 is a schematic cross-sectional view showing an embodiment of a spindle motor.
- FIG. 4 is a schematic diagram showing an embodiment of the skew adjustment apparatus.
- FIG. 5 is a bottom view of the traverse unit.
- FIG. 6 is an enlarged view of the periphery of the mounting plate in FIG.
- FIG. 7 is a schematic cross-sectional view showing the irradiation part formed on the mounting plate after heating to the heated area by the heating part.
- FIG. 8 is a plan view showing an assembly in the traverse unit, and is a bottom view of the chassis.
- FIG. 9 is an enlarged view of the periphery of the mounting plate in FIG.
- FIG. 10 is a graph showing the relationship between the angle of the pulse laser and the amount of displacement of the irradiated portion when the pulse laser is irradiated to each range of the A phase to the D phase in the heated region of the mounting plate.
- FIG. 11 is a graph showing the relationship between the number of shots of the pulse laser and the amount of displacement of the irradiated part.
- FIG. 12 is a schematic diagram showing a measuring device that measures the amount of axial tilt with respect to a virtual plane formed by the contact surface between the rotating shaft of the spindle motor, the chassis, and the holding jig.
- FIG. 13 is a flowchart showing the manufacturing process of the traverse unit.
- FIG. 13 is a flowchart showing the manufacturing process of the traverse unit.
- FIG. 14 is a plan view showing a state in which the mounting plate is irradiated with a pulse laser, and is a schematic bottom view of the mounting plate.
- FIG. 15 is a schematic cross-sectional view showing another embodiment of the spindle motor.
- FIG. 16 is a schematic top view of the spindle motor of FIG.
- FIG. 17 is a schematic bottom view of the spindle motor of FIG.
- Adjustment method of the present invention A method for adjusting the normal direction of a substrate using a pulse laser according to the present invention will be described below in detail with reference to the drawings. First, the basic technology will be described.
- the surface of a metal substrate is irradiated with a pulse laser, heated locally, melted and cooled.
- the portion irradiated with the pulse laser expands in volume when heated and melted, and deforms with the surface irradiated with the pulse laser convex.
- the heated and melted portion tends to swell due to surface tension, and there is a portion that moves in the substrate member.
- tensile stress is generated, and finally the surface irradiated with the pulse laser is deformed so as to be concave. From this, it can be seen that in order to adjust the normal direction of the substrate, it is sufficient to irradiate a pulse laser to a region 180 degrees opposite to the direction in which the normal direction is inclined.
- the spot irradiated with the pulse laser becomes a melting spot. If the spots overlap greatly, the amount of deformation decreases. For this reason, the adjustment amount of the normal direction with respect to the irradiation pulse of the pulse laser is not quantitative. Therefore, it is preferable that the portions irradiated with the pulse laser do not overlap. Note that when the amount of adjustment of the normal direction is large, the interval between the portions irradiated with the pulse laser is narrowed, and the periphery thereof may overlap. If the overlap is only at the peripheral part, the influence on the quantitativeness between the irradiation pulse and the adjustment amount of the normal direction is small.
- the apparatus for adjusting the normal direction of the substrate can be accommodated by providing a mechanism capable of rotating the substrate around the center of the specific region. That is, the pulse laser may be irradiated in synchronization with the rotation of the substrate.
- FIG. 1 is a schematic cross-sectional view of an embodiment of a disk drive device cut in the axial direction.
- the disk drive device 1 includes a spindle motor 3, an optical pickup unit 41, a pair of guide rails 42, a moving mechanism 43, a chassis 44, a tray 5, and a housing 6. Composed.
- the spindle motor 3 rotates a disk-shaped disk (not shown) around a predetermined center axis J1 (hereinafter referred to as a rotation axis J1).
- the optical pickup unit 41 is disposed on the pair of guide rails 42 and can be moved by the moving mechanism 43 along the guide rails 42.
- the pair of guide rails 42 extend in a radial direction that is a direction perpendicular to the rotation axis J1.
- the chassis 44 fixes the spindle motor 3, the guide rail 42, and the moving mechanism 43 and accommodates the optical pickup unit 41.
- the component group fixed to the chassis 44 is referred to as a traverse unit 4.
- the tray 5 inserts and ejects the disk 2 and guides the disk 2 to the spindle motor 3.
- the housing 6 accommodates the above-described elements.
- the optical pickup unit 41 includes a light emitting unit that emits light to the recording surface of the disk 2 and a light receiving unit that receives light reflected from the recording surface of the disk 2.
- the chassis 44 When the disk 2 placed on the tray 5 is moved coaxially with the rotation axis J1 of the spindle motor 3, the chassis 44 is moved upward so that the disk 2 is moved to the spindle motor 3. When the disk 2 is ejected, the chassis 44 moves downward, so that the disk 2 is detached from the spindle motor 3 and transferred to the tray 5. The tray 5 moves to the outside of the housing 6 so that the disk 2 can be taken out.
- FIG. 2 is a top view of the traverse unit 4.
- FIG. 5 is a bottom view of the traverse unit 4.
- the spindle motor 3 is fixed to a part of a substantially flat chassis 44.
- a housing opening hole 441 for housing the optical pickup unit 41 is formed in the chassis 44.
- the optical pickup unit 41 is movable in the accommodation opening hole 441 along a radial direction (in the direction of arrow 4111 in FIG. 2) centering on the rotation axis J1.
- a plurality of motor mounting portions 442 are formed around a part of the periphery of the accommodation opening hole 441, and a mounting plate 326 (see FIG. 3) of the spindle motor 3 to be described later is fixed. In this case, three motor mounting portions 442 are formed.
- a mounting hole 4421 is formed in each motor mounting portion 442.
- the spindle motor 3 is fixed to the motor mounting portion 442 by tightening the screws 4422 through the mounting holes 4421, respectively.
- Formed on the outer peripheral edge of the chassis 44 are a housing 6 (see FIG. 1) and a housing attaching portion 445 attached via a damper. In this case, three housing mounting portions 445 are formed.
- the attachment plate 326 has a flat portion that is attached to the motor attachment portion 442.
- the traverse unit 4 includes first guide rail mounting portions 443 and 443 for fixing the guide rail 42 with the motor mounting portions 442 sandwiched between the both sides of the spindle motor 3 on the lower surface of the chassis 44. Are formed. Second guide rail mounting portions 444 and 444 are formed at positions where the first guide rail mounting portions 443 and 443 are extended through the accommodation opening holes 441, respectively. By the first guide rail mounting portion 443 and the second guide rail mounting portion 444, the pair of guide rails 42 are arranged parallel to each other and along the radial direction (see FIG. 2).
- optical pickup unit 41 through holes 411 and 412 are formed in the radial direction at positions corresponding to guide rails 42 and 42, respectively.
- the guide rails 42 and 42 are inserted through the respective through holes 411 and 412.
- the optical pickup unit 41 is movable along the pair of guide rails 42.
- One of the pair of guide rails 42 is a feed shaft 421 on the outer peripheral surface of which a male screw corresponding to the female screw formed on the inner peripheral surface of the through hole 411 is formed.
- the other of the pair of guide rails 42 is a sliding shaft 422 that slides with the through hole 412.
- the moving mechanism 43 includes a drive motor 431 having a gear on an output shaft and serving as a rotational drive source, and a reduction gear 432 that meshes with the gear of the drive motor 431.
- the rotation of the drive motor 431 is decelerated by the reduction gear 432 and transmitted to the feed shaft 421.
- the gear of the output shaft rotates and rotates the reduction gear 432.
- the reduction gear 432 rotates, the feed shaft 421 rotates.
- the through hole 411 that meshes with the feed shaft 421 moves in the radial direction of the arrow 4111 in the drawing.
- the moving direction is reversed depending on the rotation direction of the drive motor 431. In this way, the optical pickup unit 41 moves along the arrow 4111 direction.
- FIG. 3 is a schematic cross-sectional view of the spindle motor 3.
- the spindle motor 3 includes a rotating body 31 that rotates about a rotation axis J ⁇ b> 1, a fixed body 32 that rotatably supports the rotating body 31, and a rotating body 31 that rotates integrally with the disk ( And a chucking device 33 capable of holding a non-illustrated).
- the rotating body 31 includes a shaft 311 arranged coaxially with the rotation axis J1, a rotor holder 312 fixed to the shaft 311, a rotor magnet 313 fixed to the rotor holder 312, and a retaining member 314 fixed to the lower surface of the rotor holder 312. And comprising.
- the rotor holder 312 is formed by pressing a thin steel plate.
- the fixed body 32 includes a sleeve 321, a housing 322, a stator 323, a lid member 324, a thrust plate 325, and a mounting plate 326.
- the sleeve 321 is formed of an oil-immersed sintered body serving as a bearing portion that rotatably supports the radial direction of the shaft 311 and has a substantially cylindrical shape.
- the housing 322 has an inner peripheral surface that holds the outer peripheral surface of the sleeve 321.
- the stator 323 is fixed to the housing 322 and forms a rotating magnetic field with the rotor magnet 313.
- the lid member 324 seals the lower end side of the inner peripheral surface of the housing 322.
- the thrust plate 325 is disposed on the upper surface of the lid member 324, and rotatably supports the shaft 311 in the axial direction.
- the mounting plate 326 is fixed to the outer side in the radial direction of the lid member 324 and to the lower end side of the inner peripheral surface of the housing 322, is fixed to the chassis 44, and has a substantially flat plate shape.
- a through-hole into which the lid member 324 and a part of the housing 322 are inserted is formed in a flat surface portion of the mounting plate 326 that is attached to the motor mounting portion 442 (see FIG. 2).
- a flange portion 3221 is formed on the upper portion of the housing 322.
- a retaining member 314 having an inner diameter smaller than the outer diameter of the flange portion 3221 is disposed below the flange portion 3221. Thereby, the movement of the rotating body 31 in the axial direction with respect to the fixed body 32 is restricted.
- An inner protrusion 322a and an outer protrusion 322b are provided on the lower end surface of the housing 322.
- the inner protrusion 322a fixes the lid member 324.
- the outer protrusion 322b is formed on the outer side in the radial direction than the inner protrusion 322a, and fixes the mounting plate 326.
- the inner protrusion 322a and the outer protrusion 322b each have a substantially annular shape extending downward.
- An inner contact surface 322c that can determine the position of the lid member 324 in the axial direction is formed on the radially inner side of the inner protrusion 322a by contacting the upper surface of the lid member 324.
- An outer contact surface 322d that can determine the position of the mounting plate 326 in the axial direction is formed on the outer side in the radial direction from the outer protrusion 322b.
- the inner contact surface 322c and the outer contact surface 322d are substantially annular planes extending perpendicularly to the rotation axis J1.
- the outer protrusion 322a is plastically deformed radially outward. Accordingly, the attachment plate 326 is fixed to the lower end surface of the housing 322 by being sandwiched between the outer contact surface 322d and the outer protrusion 322a. That is, the mounting plate 326 is caulked and fixed to the housing 322.
- the inner protrusion 322a is plastically deformed radially inward. Accordingly, the lid member 324 is fixed to the lower end surface of the housing 322 by being sandwiched between the inner contact surface 322c and the inner contact surface 322a. That is, the lid member 324 is caulked and fixed to the housing 322. Therefore, the mounting plate 326 and the lid member 324 and the housing 322 are fixed by an inexpensive method without using a fixing member. As a result, an inexpensive motor can be provided.
- the chucking device 33 includes a center case 331, a centering claw 331a, a claw member 332, and an elastic member 333.
- the center case 331 is opposed to the inner peripheral surface of the center opening 21 (see FIG. 1) formed in the disk 2 in the radial direction, and is disposed on the inner side of the center opening 21.
- the aligning claw 331a is provided integrally with the center case 331.
- the alignment claw 331 a adjusts the center of the center opening 21 of the disk 2 and the center of the center case 331 by pressing the inner peripheral surface of the center opening 21 radially outward.
- the claw member 332 is movable in the radial direction for holding the disk 2 by pressing the upper edge of the central opening 21.
- the elastic member 333 biases the claw member 332 radially outward.
- the centering claw 331a is provided integrally with the center case 311 and is provided with three spaced apart in the circumferential direction.
- the claw member 332 is disposed between the alignment claws 331a adjacent in the circumferential direction, and three claw members 332 are provided.
- the elastic member 333 uses a coil spring that expands and contracts in the radial direction.
- a mounting surface 312 a on which the lower surface of the disk 2 is mounted is formed on the upper surface of the rotor holder 312 on the radially outer side.
- the mounting surface 312a is formed by arranging a resin material such as rubber having a larger friction coefficient than the upper surface of the rotor holder 312 in an annular shape.
- skew adjustment which is a specific example when the method is applied to adjustment of the axis inclination of a spindle motor.
- FIG. 4 is a schematic diagram showing an embodiment of the skew adjustment device 7 according to the present invention.
- the skew adjustment device 7 will be described with reference to FIG.
- the skew adjustment device 7 includes a holding unit 71, a measurement unit 72, a heating unit 73, a rotation mechanism 74, a moving mechanism 75, and a control unit 76.
- the holding part 71 holds the assembly AS1.
- the assembly AS1 is a state in which the spindle motor 3 and the chassis 44 in the traverse unit 4 are assembled.
- the measuring unit 72 measures the height in the direction of the central axis J ⁇ b> 2 at a plurality of measurement positions on the chassis 44.
- the heating unit 73 heats the mounting plate 326 held by the holding unit 71.
- the rotation mechanism 74 rotates the assembly AS1 together with the holding unit 71.
- the moving mechanism 75 moves the holding unit 71 relative to the heating unit 73.
- the control unit 76 controls these configurations.
- the central axis J2 is the rotation center of the rotation mechanism 74.
- the chassis 44 is disposed with respect to the holding portion 71 so that the contact position J1a between the central axis J2, the shaft 311 of the spindle motor 3 and the thrust plate 325 (see FIG. 3) is substantially the same.
- three holding portions 71 are provided.
- FIG. 5 is a plan view of the traverse unit 4 as viewed from below.
- the assembly AS ⁇ b> 1 is held by the holding unit 71 with the side on which the spindle motor 3 is mounted in the motor mounting unit 442 of the chassis 44 facing the upper side in the axial direction. Thereby, the position of the axial direction with respect to the holding part 71 of the chassis 44 is determined.
- a measurement unit 72 is disposed above the holding unit 71.
- the upper side of the holding portion 71 is a side on which the spindle motor 3 is attached to the chassis 44.
- the measuring unit 72 measures the height in the axial direction from the reference position (reference plane).
- the reference position (reference plane) is an imaginary plane 446 (see FIG. 5) that connects contact surfaces (Z1, Z2, and Z3 in FIG. 5) between the holding portion 71 and a plane having the same height on the lower surface of the chassis 44. ).
- the heating part 73 is arrange
- the lower side of the holding portion 71 is the lower surface side of the chassis 44 that is opposite to the side on which the spindle motor 3 is attached.
- the heating unit 73 heats the mounting plate 326 by locally irradiating a pulsed pulse laser from the lower surface side of the mounting plate 326.
- the moving mechanism 75 is a so-called XY table that moves the chassis 44 together with the holding unit 71 in two directions parallel to the virtual plane 446 and perpendicular to each other.
- the assembly AS1 held by the holding portion 71 is rotated at a constant speed by the rotation mechanism 74 around the central axis J2.
- a pulsed laser from the heating unit 73 is irradiated on a small irradiation area of the mounting plate 326 of the spindle motor 3 on the lower surface side of the mounting plate 326.
- the pulse laser falls within a predetermined irradiation angle range in an annular region 3261 formed radially outward from the outer protrusion 322b of the housing 322 on the lower surface side of the mounting plate 326 of the spindle motor 3 (see FIG. 1). (See FIG. 6).
- This region 3261 is heated by the pulse laser irradiation.
- the region 3261 is referred to as a “heated region 3261”.
- FIG. 6 is an enlarged view of the periphery of the mounting plate 326 in the spindle motor 3 of FIG.
- FIG. 7 is a schematic cross-sectional view showing the irradiation unit 3262 formed on the attachment plate 326 after heating the heated region 3261 by the heating unit 73.
- the heated region 3261 is heated from the lower surface side of the mounting plate 326, so that the heated region 3261 is once melted and plastically deformed to the lower surface side (downward in FIG. 7). It expands with accompanying. Thereafter, as the temperature decreases, the heated region 3261 contracts and deforms upward in FIG. This is to deform in the opposite direction to the deformation direction during heating.
- the substantially flat portion 3262 surrounded by the heated region 3261 is displaced to the side opposite to the heating unit 73 side with respect to the central axis J2, as indicated by a two-dot chain line in FIG.
- the portion 3262 of the mounting plate 326 is referred to as an “irradiation unit 3262”.
- FIG. 8 is a view showing an assembly in the traverse unit 4 of the present invention, and is a plan view seen from the lower side of the chassis 44.
- the center of gravity P1 of the second virtual plane 446a connecting the three motor mounting portions 442 and the rotation axis J1 of the spindle motor 3 are provided at different positions.
- the lower surface of the mounting plate 326 that forms the heated region 3261 has an asymmetric shape in the circumferential direction about the central axis J1. Therefore, the heated region 3261 (see FIGS. 6 and 7) has different strengths in the circumferential direction. Therefore, even when the pulse laser is irradiated in the circumferential direction with a constant output, the deformation amount of the irradiation unit 3262 in the heated region 3261 differs depending on the irradiated circumferential position.
- FIG. 9 is an enlarged view in which the periphery of the mounting plate in the spindle motor 3 in FIG. 3 is enlarged. Therefore, as shown in FIG. 9, the heated region 3261 in the spindle motor 3 (see FIGS. 6 and 7) is divided into four equal parts in the circumferential direction around the rotation axis J1, and each phase is divided into A phase, B phase, C phase and D phase (corresponding to A to D in FIG. 9). Each of the A phase to D phase is irradiated by a pulse laser whose irradiation angle range is changed. Thereby, data on the relationship between the range of the pulse laser irradiation angle in each range of the A phase to the D phase and the displacement amount of the irradiation unit 3262 is created.
- FIG. 10 is a graph showing the relationship between the angle of the irradiation range and the amount of displacement (angle) of the irradiation unit 3262.
- the angle of the irradiation range means an arc-shaped angle centered on the central axis J2 of the pulse laser when each of the A phase to D phase in the heated region 3261 of the mounting plate 326 is irradiated with the pulse laser.
- the A phase to the D phase are positions set at equal intervals of 90 degrees in the circumferential direction around the central axis J2 (or the rotation axis J1), and pulse lasers are arranged on both sides in the circumferential direction around this position. Irradiate half of the irradiation angle range.
- the pulse laser is irradiated approximately 90 degrees in the circumferential direction around each range of the A phase to the D phase.
- the displacement amount of each irradiation unit 3262 is 60 ° to 120 ° or 240 ° or more in the irradiation angle range. The difference is getting bigger.
- the range of the irradiation angle is approximately 180 degrees, the difference in the displacement amount of the irradiation unit 3262 is the smallest. Therefore, in each range of the A phase to the D phase, the amount of displacement of the irradiation unit 3262 can be made substantially constant by irradiating the pulse laser in the range of about 180 degrees.
- the predetermined area to be irradiated with the pulse laser may be substantially half a circle centered on the center of the specific area.
- the center of the circular substrate is irradiated with a pulse laser, the result is not as described above, and it is assumed that there is little difference in the amount of displacement at any phase. Since the substrate used in this experiment has the shape shown in FIG. 9, the peripheral shape of the region irradiated with the pulse laser differs depending on the phase, that is, the peripheral edge of the substrate differs in the circumferential direction. It is presumed that there was a difference in displacement.
- FIG. 11 is a graph showing the relationship between the number of shots of the pulse laser and the displacement amount (adjustment amount (angle)) of the irradiation unit 3262.
- the amount of displacement of the irradiation unit 3262 changes in proportion to the number of shots of the pulse laser.
- the amount of displacement of the irradiation unit 3262 can be quantitatively controlled by controlling the number of shots of the pulse laser.
- the number of shots of the pulse laser is the number of times the pulse laser is irradiated within the irradiation angle range of the pulse laser. For example, when the number of shots of the pulse laser is 30, assuming that the irradiation angle range of the pulse laser is approximately 180 degrees, the pulse laser is irradiated approximately every 6 degrees.
- the virtual plane 446 is a virtual plane formed by a contact surface between the holding portion 71 and the chassis 44 of the assembly AS1.
- FIG. 12 is a schematic diagram showing the measuring device 8 that measures the amount of axial inclination of the rotation axis J1 of the spindle motor 3 with respect to the virtual plane 446.
- the measuring device 8 includes an autocollimator 81, a holding jig 82 that comes into contact with the position where the holding portion 71 of the chassis 44 contacts, a dummy disk 83 that is mounted on the spindle motor 3 and reflects light from the autocollimator 81, Is provided.
- the holding jig 82 forms an imaginary plane 446 by contacting the same part of the chassis 44.
- the chassis 44 contacts the holding portion 71 of the skew adjustment device 7.
- the autocollimator 81 includes a lens unit 811 that emits and receives light, and a display 812 that displays data of light emission and light reception of the lens unit 811.
- the dummy disk 83 is rotated by the spindle motor 3.
- Light emitted from the lens unit 811 of the autocollimator 81 toward the dummy disk 83 and perpendicular to the virtual plane 446 is reflected by the dummy disk 83 and received by the lens unit 811 again.
- the axis tilt amount and direction of the rotation axis of the spindle motor are calculated from the deviation data between the light emitting position and the light receiving position of the lens unit 811 and displayed on the display 812.
- FIG. 13 is a flowchart showing the manufacturing flow of the present invention. In the present embodiment, the flow of manufacturing the traverse unit 4 will be described in particular.
- the spindle motor 3 is attached to the motor attachment portion 442 of the chassis 44 formed by pressing (step S1).
- the spindle motor 3 is fixed to the motor mounting portion 442 by fastening with screws.
- the measuring device 8 measures the amount of axial inclination and the circumferential position of the rotation axis J1 of the spindle motor 3 with respect to the virtual plane 446 (step S2). ).
- the chassis 44 is brought into contact with the holding jig 82 of the measuring device 8 and held.
- a virtual plane 446 is formed by connecting the contact surfaces of the holding jig 82 and the chassis 44. This virtual plane 446 is taken as a reference plane.
- the dummy disk 83 is attached to the spindle motor 3.
- the lens portion 811 of the autocollimator 81 is disposed on the upper side of the dummy disk 83 so that the light hits the upper surface of the dummy disk 83.
- the lens unit 811 is set to be perpendicular to the virtual plane 446.
- the irradiation condition of the pulse laser in the following procedure. (1) A plurality of assemblies in which a spindle motor and a chassis are assembled are prepared, and a pulse laser is irradiated on the assembly by changing the irradiation angle range and the number of shots. (2) A quantitative relationship between the irradiation angle and the number of shots and the amount of displacement of the irradiation unit 3262 is obtained. (3) From the above results, the optimum irradiation angle range and the number of shots are determined.
- the optimum pulse laser irradiation angle range is approximately 180 degrees as shown in FIG. Further, the quantitative relationship between the number of shots of the pulse laser and the displacement amount of the irradiation unit 3262 is shown in FIG.
- FIG. 11 is compared with the amount of tilt of the rotation axis J1 of the spindle motor 3 measured in step S2 in FIG. 13, and the optimum number of shots of the pulse laser is selected. Then, the pulse laser is irradiated over a range of approximately 180 degrees around the position in the circumferential direction of the axis inclination of the rotation axis J1 of the spindle motor 3. That is, a range of approximately 90 degrees from the circumferential position of the axis tilt of the rotation axis J1 of the spindle motor 3 toward both sides in the circumferential direction is irradiated with a pulse laser (see FIG. 14). Thereby, the amount of axial inclination of the rotation axis J1 of the spindle motor 3 is adjusted.
- heated region 3261 is irradiated in an arc of approximately 180 degrees toward the axis tilt direction side of rotation axis J1.
- the mounting plate 326 on the axis tilt direction side of the rotation axis J1 is displaced upward in the axial direction.
- the housing 322 is also displaced upward in the axial direction.
- the inner peripheral surface of the through-hole holding the sleeve 321 of the housing 322 is displaced to the opposite side with respect to the central axis J1 with respect to the axial inclination direction.
- the sleeve 321 is similarly displaced to the opposite side with respect to the central axis J2 with respect to the axial inclination direction. Accordingly, the shaft 311 supported on the inner peripheral surface of the sleeve 321 is similarly displaced to the opposite side with respect to the central axis J2 with respect to the axial inclination direction. As a result, since the shaft 311 and the rotation axis J1 are coaxial, the rotation axis J1 is adjusted within a preset allowable range. See FIG. 3 for housing 322, sleeve 321, and shaft 311.
- the measuring device 8 which is step S2 in FIG. 13 measures the amount of axial inclination and the position of the rotation axis J1 of the spindle motor 3 with respect to the virtual plane 446.
- the axis inclination amount of the rotation axis J1 of the spindle motor 3 with respect to the virtual plane 446 is again compared with the preset allowable range. If the axis inclination amount of the rotation axis J1 of the spindle motor 3 with respect to the virtual plane 446 is outside the set allowable amount range, the skew adjustment which is step S3 in FIG. 13 is performed again.
- the dummy disk 83 is removed from the spindle motor 3.
- a pair of guide rails 42 to which the optical pickup unit 41 is attached in advance are attached to the first guide rail attachment portion 443 and the second guide rail 444 of the chassis 44 (step S4 in FIG. 13).
- the moving mechanism 43 is attached to the chassis 44 at the same time. Thereby, the traverse unit 4 is assembled.
- the irradiation area of the pulse laser is specified in a specific angle range, variation in the amount of displacement due to the irradiation of the pulse laser can be reduced. Therefore, the amount and direction of the axis tilt of the rotation axis J1 with respect to the virtual plane 446 that is the reference plane can be managed with high accuracy.
- the rotation axis J1 of the spindle motor 3 in the traverse unit 4 and the light emission direction of the optical pickup unit 41 can be adjusted substantially in parallel. That is, the rotation axis J1 of the spindle motor 3 and the light emission direction of the optical pickup unit 41 can be set within the range of the relative inclination amount set in advance. Therefore, the light emission direction of the optical pickup unit 41 and the recording surface of the disk 2 can be perpendicularly made with high accuracy. As a result, it is possible to provide a disk drive device that can sufficiently prevent a recording / reproducing error caused by the inclination of the rotating shaft. Furthermore, it is possible to provide a disk drive device that can reduce vibrations generated by the rotation of the spindle motor.
- the method for adjusting the axis inclination of the rotation axis J1 using the skew adjustment device 7 according to the present invention can adjust the axis inclination amount with respect to the virtual plane 446 with high accuracy. For this reason, it is particularly suitable as an adjustment method when the press-processed rotor holder 312 is used for the spindle motor 3. Note that press working has a limit in improving processing accuracy. Furthermore, the method is particularly suitable as an adjustment method in the case where a fixed body 32 in which a mounting plate 326 and a housing 322 are caulked is used for the spindle motor 3. The caulking structure between the mounting plate 326 and the housing 322 has a particularly strong influence on the axis inclination of the rotation axis J1. These spindle motors 3 are mounted on the disk drive device 1.
- FIG. 15 is a schematic cross-sectional view taken along the axial direction, showing another embodiment of the spindle motor of the present invention.
- FIG. 16 is a plan view of the spindle motor of FIG. 15 viewed from the upper side in the axial direction.
- FIG. 17 is a plan view of the spindle motor of FIG. 15 viewed from the lower side in the axial direction.
- the spindle motor 3a in FIGS. 15 to 17 uses the same members as the spindle motor 3 except for the mounting plate 326a.
- description of the same member as the spindle motor 3 is omitted, and the shape of the mounting plate 326a will be described.
- the mounting plate 326a of the spindle motor 3a includes a first flat portion 326a1, a bent portion 326a2, and a second flat portion 326a3.
- the first flat portion 326a1 has a substantially circular shape to which the housing 322 is fixed.
- the bent part 326a2 is bent upward from the first plane part 326a1.
- the second flat portion 326a3 is continuous with the bent portion 326a2, forms a plane parallel to the first flat portion 326a1, and has a plurality of attachment portions 326a4 attached to a chassis (not shown). In the present embodiment, three attachment portions 326a4 are provided.
- the bent portion 326a2 is formed at a part of the outer peripheral edge of the first flat portion 326a1 in the circumferential direction.
- the reference plane of the spindle motor 3a is a virtual plane 446b formed by connecting a plurality of mounting portions 326a4 (see FIG. 17). Then, the axis inclination amount and direction of the rotation axis J1 of the spindle motor 3a are measured with respect to the virtual plane 446b. As a result, the plurality of attachment portions 326a4 are directly attached to the chassis, and thus become an important part for determining the position and inclination of the spindle motor 3a with respect to the chassis. Therefore, by using the virtual plane 446b formed by the plurality of attachment portions 326a4 as the reference plane, highly accurate skew adjustment can be performed.
- the mounting plate 326a is formed with a bent portion 326a2 at a part of the outer peripheral edge of the first flat portion 326a1, the first flat portion 326a1 has a circumferential strength around the rotation axis J1. Is non-uniform.
- the heated region 3261 and the irradiation unit 3262 irradiated with the pulse laser are at the same position as the spindle motor 3.
- the skew adjustment of the spindle motor 3a is performed in the same manner as described above, in the step of setting the irradiation angle range of the pulse laser that is a heating unit in advance, and the number of shots of the pulse laser is changed with respect to the set irradiation angle range of the pulse laser. And a step of obtaining data on the relationship with the change in the displacement amount of the irradiation section. Then, after measuring the amount and direction of the axis tilt of the rotation axis J1 with respect to the virtual plane 446b of the spindle motor 3a, the pulse laser is irradiated with the axis tilt direction as the center. Thereby, the spindle motor 3a can be perpendicular to the virtual plane 446b with high accuracy.
- the first flat surface portion 326a1 of the mounting plate 326a is divided into a plurality of ranges having different intensities (in this embodiment, it is divided into four ranges). Then, a pulse laser in which a plurality of irradiation angle ranges are changed for each of the divided ranges is irradiated, and data obtained by measuring the amount of displacement is collected. Based on the collected data, the irradiation angle range of the pulse laser with the least variation in the amount of displacement of the irradiation unit in each range is set. In this embodiment, the irradiation angle range of the pulse laser is approximately 180 degrees.
- the number of shots of the pulse laser is changed, in the step of obtaining the relationship between the number of shots and the amount of displacement of the irradiation part, the number of shots is changed within the set irradiation angle range of the pulse laser. Irradiate. Thereby, quantitative data of the relationship between the change in the number of shots of the pulse laser and the amount of displacement of the irradiation unit can be obtained.
- the skew adjustment in the above-described embodiment is performed in the state of the assembly AS1, but the present invention is not limited to this.
- the skew may be adjusted after the traverse unit 4 is assembled.
- the range of the mounting plates 326 and 326a is divided into four ranges around the rotation axis J1.
- the invention is not limited to this.
- the range of the mounting plate is not limited to four ranges, but may be a plurality of ranges.
- the mounting plates 326 and 326a are not limited to the above-described embodiment.
- the chassis and the mounting plate may be configured by the same member to serve as the mounting base.
- the disk 2 is conveyed by the tray 5, but the present invention is not limited to this.
- the disk may be conveyed by providing rollers on both sides of the opening hole for inserting and discharging the disk in the housing of the disk drive device.
- the disk drive device described above was a device for driving an optical disk.
- the mounting plate 326 is often a steel plate.
- the disk drive device is not limited to this, and may be a hard disk drive device.
- the substrate on which the motor is mounted is often made of aluminum die cast.
- the present invention can also be applied to an aluminum die-cast substrate.
- the present invention has been described using the disk drive device as an example.
- the present invention is not limited to this, and the pulse laser oscillation condition is constant regardless of the direction and amount of change in the normal direction of the substrate, the normal direction of the substrate can be adjusted, and the operability is good and preferable. It is.
- the present invention can change the normal direction of the substrate without changing the oscillation condition of the pulse laser. Therefore, the present invention can be applied not only to the adjustment of the normal direction on the mounting plate of the disk drive device described above and the adjustment of the axis inclination of the spindle motor, but also to the adjustment of the normal direction of various substrates.
Landscapes
- Rotational Drive Of Disk (AREA)
Abstract
Description
基板上のある特定領域の法線方位を変化させる方向および量に応じて、前記特定領域の周囲の所定領域に、収束させたパルスレーザを照射して局部的に溶融・冷却させることにより、前記特定領域の法線方位を変化させる、基板の法線方位の調整方法において、
前記パルスレーザを照射する所定領域内において、前記パルスレーザを照射する箇所を複数とし、
前記法線方位を変化させる方向に応じて、前記所定領域の中心位置と範囲を定め、
前記法線方位を変化させる量は、前記所定領域内における前記パルスレーザを照射する箇所の数を増減することにより増減させ、
前記パルスレーザを照射する箇所の分布密度は、前記照射する箇所を増やす場合には高くし、前記照射する箇所を減らす場合には低くし、
前記パルスレーザの発振条件は、前記法線方位を変化させる方向および量に拘わらず、実質的に一定としたことを特徴とする。
2 ディスク
3、3a スピンドルモータ
31 回転体
311 シャフト
312 ロータホルダ
312a 載置面
313 ロータマグネット
32 固定体
321 スリーブ(軸受部)
322 ハウジング
326、326a 取付板
3261 被加熱領域
3262 照射部
33 チャッキング装置
4 トラバースユニット
41 光ピックアップユニット
42 ガイドレール
44 シャーシ
441 収容開口穴
442 モータ取付部
446、446a 仮想平面
5 トレイ
6 筐体
J1 回転軸
J2 中心軸
S1~S4 ステップ(工程)
本発明によるパルスレーザを用いた基板の法線方位の調整方法について、図面を参照しながら、以下に詳細に説明する。
まず、基本となる技術について説明する。
このように考えると、基板の法線方位の調整するための装置において、特定領域の中央を中心として、基板を回転できる機構を備えれば、対応できる。つまり、パルスレーザは、基板の回転に同期して照射されればよい。
本発明を適用しうる一例示としては、ディスク駆動装置の基板と回転軸との垂直度の調整が挙げられる。
そこでまず、ディスク駆動装置における一実施形態について、図1と図2を用いて説明する。図1は、ディスク駆動装置の一実施形態を、軸方向に切った模式断面図である。
図1を参照して、ディスク駆動装置1は、スピンドルモータ3と、光ピックアップユニット41と、一対のガイドレール42と、移動機構43と、シャーシ44と、トレイ5と、筐体6と、から構成される。
トレイ5は、ディスク2の挿入および排出し、ディスク2をスピンドルモータ3へ案内する。筐体6は、上述した要素を収容する。
ディスク2を排出する際には、シャーシ44が下側に移動することによって、ディスク2はスピンドルモータ3から外れ、トレイ5に移される。トレイ5は、筐体6の外側まで移動して、ディスク2を取り出せるようにする。
トラバースユニット4の構成について、図2および図5を用いて説明する。図2は、トラバースユニット4の上面図である。図5は、トラバースユニット4の下面図である。
本発明を適用しうるスピンドルモータの全体構造の一実施形態について、図3を用いて説明する。図3は、スピンドルモータ3の模式断面図である。
スリーブ321は、シャフト311の径方向を回転自在に支持する軸受部となる、油を浸した焼結体にて形成され、略円筒形状をしている。ハウジング322は、スリーブ321の外周面を保持する内周面を有する。ステータ323は、ハウジング322に固定され、ロータマグネット313との間にて回転磁界を形成する。
蓋部材324は、ハウジング322の内周面の下端側を封止する。スラストプレート325は、蓋部材324の上面に配置され、シャフト311を回転自在に軸方向に支持する。取付板326は、蓋部材324の径方向外側で、かつハウジング322の内周面の下端側に固定され、シャーシ44に固定され、略平板状をしている。
取付板326における、モータ取付部442(図2参照)に取り付けられる平面部には、蓋部材324とハウジング322の一部が挿入される貫通穴が形成される。
センターケース331は、ディスク2に形成された中心開口部21(図1参照)の内周面と径方向に対向し、この中心開口部21より内側に配置される。調芯爪331aは、センターケース331と一体に設けられている。調芯爪331aは、中心開口部21の内周面を径方向外側に押圧することによって、ディスク2の中心開口部21の中心とセンターケース331の中心とを調整する。爪部材332は、中心開口部21の上端縁を押圧することによって、ディスク2を保持する径方向に移動自在である。弾性部材333は、爪部材332を径方向外側に付勢する。
スピンドルモータ、ディスク駆動装置において、スキュー調整装置およびスキュー調整の方法について、図4から図12を用いて説明する。
図4を参照して、スキュー調整装置7について説明する。スキュー調整装置7は、保持部71と、計測部72と、加熱部73と、回転機構74と、移動機構75と、制御部76と、を備える。
保持部71は、組立体AS1を保持する。ここで、組立体AS1は、トラバースユニット4における、スピンドルモータ3とシャーシ44とを組立てた状態のものをいう。計測部72は、シャーシ44上の複数の計測位置における、中心軸J2方向の高さを計測する。加熱部73は、保持部71に保持された取付板326を加熱する。回転機構74は、組立体AS1を保持部71とともに回転する。移動機構75は、保持部71を加熱部73に対して相対的に移動させる。制御部76は、これらの構成を制御する。
スキュー調整装置7において、組立体AS1は、シャーシ44のモータ取付部442におけるスピンドルモータ3が取り付けられる側を、軸方向の上側に向けて、保持部71によって保持される。これにより、シャーシ44の保持部71に対する軸方向の位置が決定される。保持部71の上側には、計測部72が配置される。保持部71の上側は、スピンドルモータ3がシャーシ44に対して取り付けられる側である。
以下の説明では、取付板326の部位3262を「照射部3262」とする。
図8を参照して、3個のモータ取付部442を結んだ第2仮想平面446aの重心P1とスピンドルモータ3の回転軸J1とは異なる位置に設けられる。また、被加熱領域3261を形成する取付板326の下面は、中心軸J1を中心に周方向に非対称な形状である。したがって、被加熱領域3261(図6および図7参照)は、周方向に強度が異なる。そのため、パルスレーザを周方向に一定の出力にて照射したとしても、被加熱領域3261の照射部3262の変形量は、照射された周方向の位置によって異なる。
そこで、図9に示すように、スピンドルモータ3における被加熱領域3261(図6および図7参照)を、回転軸J1を中心として周方向に4等分し、各位相をA位相、B位相、C位相、D位相とする(図9中のA~Dに対応する)。これらA位相~D位相のそれぞれについて、照射角度範囲を変化させたパルスレーザによって照射する。これにより、A位相~D位相の各範囲におけるパルスレーザの照射角度の範囲と、照射部3262の変位量との関係のデータを作成する。
次に、図12を用いて、仮想平面446(図5参照)に対する、スピンドルモータ3の回転軸J1の軸傾き量の測定方法について説明する。この仮想平面446は、保持部71と組立体AS1のシャーシ44との接触面にて形成された仮想平面である。
測定装置8は、オートコリメータ81と、シャーシ44における保持部71が接触した位置に接触する保持治具82と、スピンドルモータ3に装着し、オートコリメータ81からの光を反射するダミーディスク83と、を備える。保持治具82は、シャーシ44の同一の部位と接触することによって、仮想平面446を形成する。シャーシ44は、スキュー調整装置7の保持部71と接触する。
本発明におけるトラバースユニット4の製造方法について、図13を用いて説明する。図13は、本発明の製造の流れを示すフロー図である。本実施例では、特にトラバースユニット4の製造の流れについて説明する。
まず、測定装置8の保持治具82にシャーシ44を接触させて、保持する。この際、保持治具82とシャーシ44との接触面を結ぶことによって仮想平面446が形成される。この仮想平面446を基準平面とする。
次に、スピンドルモータ3には、ダミーディスク83を装着させる。そしてダミーディスク83の上面に光が当たるように、ダミーディスク83の上側にオートコリメータ81のレンズ部811が配置される。このレンズ部811は、仮想平面446に対して垂直となるように設定されている。
そしてスピンドルモータ3の回転軸J1の仮想平面446に対する軸傾き量が、予め設定された設定許容範囲内である場合(Yes)、図13中のステップS4であるガイドレール42の取付工程へと進む。
(1)スピンドルモータとシャーシとを組立てた組立体を複数用意し、これに照射角度範囲とショット数とを変化させて、パルスレーザを照射する。
(2)照射角度およびショット数と、照射部3262の変位量との、定量的な関係を求める。
(3)以上の結果から、最適な照射角度範囲およびショット数を決定する。
したがって、スリーブ321の内周面に支持されるシャフト311が同様に、軸傾き方向に対して中心軸J2に対して反対側に変位する。その結果、シャフト311と回転軸J1とは同軸であるために、回転軸J1が予め設定された設定許容範囲内に調整される。ハウジング322、スリーブ321、およびシャフト311に関しては、図3を参照のこと。
さらに、スピンドルモータ3に、取付板326とハウジング322とがかしめられた固定体32を用いる場合の調整方法として、特に適している。取付板326とハウジング322とのかしめ構造は、回転軸J1の軸傾きに特に強い影響がある。
これら、スピンドルモータ3はディスク駆動装置1に搭載される。
スピンドルモータを組立てた状態におけるスキュー調整について、図15から図17を用いて説明する。図15は、本発明のスピンドルモータの他の実施形態を示した、軸方向に切った模式断面図である。図16は、図15のスピンドルモータを軸方向上側より見た平面図である。図17は、図15のスピンドルモータを軸方向下側より見た平面図である。図15から図17におけるスピンドルモータ3aは、取付板326a以外は、スピンドルモータ3と同一部材を用いている。
以下、スピンドルモータ3と同一部材についての説明は省略し、取付板326aの形状について説明する。
本実施形態では、取付部326a4は3箇所設けられる。折曲げ部326a2は、第1平面部326a1の外周縁の周方向の一部に形成される。
Claims (10)
- 基板上のある特定領域の法線方位を変化させる方向および量に応じて、前記特定領域の周囲の所定領域に、収束させたパルスレーザを照射して局部的に溶融・冷却させることにより、前記特定領域の法線方位を変化させる、基板の法線方位の調整方法において、
前記パルスレーザを照射する所定領域内において、前記パルスレーザを照射する箇所を複数とし、
前記法線方位を変化させる方向に応じて、前記所定領域の中心位置と範囲を定め、
前記法線方位を変化させる量は、前記所定領域内における前記パルスレーザを照射する箇所の数を増減することにより増減させ、
前記パルスレーザを照射する箇所の分布密度は、前記照射する箇所を増やす場合には高くし、前記照射する箇所を減らす場合には低くし、
前記パルスレーザの発振条件は、前記法線方位を変化させる方向および量に拘わらず、実質的に一定としたことを特徴とする基板の法線方位の調整方法。 - 請求項1に記載の基板の法線方位の調整方法において、
前記所定の領域に前記パルスレーザを照射する箇所の数と、前記特定領域の法線が変化する方向および量との関係を予め把握しておき、
前記関係に基づき、前記法線方位を変化させる量に応じて前記パルスレーザを照射する箇所の数を決定する、基板の法線方位の調整方法。 - 請求項1に記載の基板の法線方位の調整方法において、
前記所定領域は、特定領域の中央付近を中心として、略環状であり、
複数の前記照射箇所は、前記略環状の所定領域内にあり、
前記照射箇所の分布密度は、特定領域の中央と照射する位置との距離と、互いに隣接する照射箇所の間の距離とによって制御する、基板の法線方位の調整方法。 - 請求項3に記載の基板の法線方位の調整方法において、
前記所定領域は、特定領域の中央を中心として、一定の角度範囲とした、基板の法線方位の調整方法。 - 請求項4に記載の基板の法線方位の調整方法において、
前記所定領域は、前記特定領域の中央を中心として略半周に亘って広がっている、基板の法線方位の調整方法。 - 請求項1から5のいずれに記載の基板の法線方位の調整方法において、
前記基板は、前記パルスレーザの局所的な照射による加熱・冷却により、変形を起こす材料よりなる、基板の法線方位の調整方法。 - 請求項6に記載の基板の法線方位の調整方法において、
前記基板はアルミニウム合金または鋼板である、基板の法線方位の調整方法。 - 請求項7に記載の基板の法線方位の調整方法において、
前記基板はスピンドルモータのベース基板である、基板の法線方位の調整方法。 - 請求項8に記載の基板の法線方位の調整方法において、
前記ベース基板は、スピンドルモータの軸受部が固定される平面を有し、前記平面の周縁は周方向に剛性が異なる、基板の法線方位の調整方法。 - 請求項7に記載の基板の法線方位の調整方法において、
前記基板は光ディスクドライブ用モータのベース基板である、基板の法線方位の調整方法。
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JPH0724534A (ja) * | 1993-07-12 | 1995-01-27 | Ishikawajima Harima Heavy Ind Co Ltd | 線状加熱による金属板の曲げ加工方法 |
JPH10146621A (ja) * | 1996-11-13 | 1998-06-02 | Ishikawajima Harima Heavy Ind Co Ltd | 線状加熱による金属板の曲げ加工方法 |
JP2002373485A (ja) * | 2001-06-15 | 2002-12-26 | Sankyo Seiki Mfg Co Ltd | ディスク駆動装置、並びにディスク駆動装置の製造方法及び製造装置 |
JP2007317272A (ja) * | 2006-05-24 | 2007-12-06 | Nippon Densan Corp | モータ部品、モータ部品の製造方法、および、モータ部品製造装置 |
Family Cites Families (2)
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KR20070087629A (ko) * | 2004-11-30 | 2007-08-28 | 코닌클리케 필립스 일렉트로닉스 엔.브이. | 자동 디스크 기울기 교정 방법 및 장치 |
JP4390769B2 (ja) * | 2005-12-27 | 2009-12-24 | 三洋電機株式会社 | 光ピックアップ装置 |
-
2009
- 2009-03-10 WO PCT/JP2009/054524 patent/WO2009113526A1/ja active Application Filing
- 2009-03-10 KR KR1020107020170A patent/KR101233518B1/ko not_active IP Right Cessation
- 2009-03-10 CN CN200980103426.7A patent/CN101933091B/zh not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0724534A (ja) * | 1993-07-12 | 1995-01-27 | Ishikawajima Harima Heavy Ind Co Ltd | 線状加熱による金属板の曲げ加工方法 |
JPH10146621A (ja) * | 1996-11-13 | 1998-06-02 | Ishikawajima Harima Heavy Ind Co Ltd | 線状加熱による金属板の曲げ加工方法 |
JP2002373485A (ja) * | 2001-06-15 | 2002-12-26 | Sankyo Seiki Mfg Co Ltd | ディスク駆動装置、並びにディスク駆動装置の製造方法及び製造装置 |
JP2007317272A (ja) * | 2006-05-24 | 2007-12-06 | Nippon Densan Corp | モータ部品、モータ部品の製造方法、および、モータ部品製造装置 |
Also Published As
Publication number | Publication date |
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CN101933091A (zh) | 2010-12-29 |
KR101233518B1 (ko) | 2013-02-14 |
KR20100119790A (ko) | 2010-11-10 |
CN101933091B (zh) | 2013-05-22 |
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