WO2011040100A1 - Tête optique, dispositif d'enregistrement optique et procédé permettant de fixer une tête optique - Google Patents

Tête optique, dispositif d'enregistrement optique et procédé permettant de fixer une tête optique Download PDF

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Publication number
WO2011040100A1
WO2011040100A1 PCT/JP2010/061028 JP2010061028W WO2011040100A1 WO 2011040100 A1 WO2011040100 A1 WO 2011040100A1 JP 2010061028 W JP2010061028 W JP 2010061028W WO 2011040100 A1 WO2011040100 A1 WO 2011040100A1
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WO
WIPO (PCT)
Prior art keywords
optical
optical element
adhesive
slider
light
Prior art date
Application number
PCT/JP2010/061028
Other languages
English (en)
Japanese (ja)
Inventor
博之 新藤
Original Assignee
コニカミノルタオプト株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by コニカミノルタオプト株式会社 filed Critical コニカミノルタオプト株式会社
Publication of WO2011040100A1 publication Critical patent/WO2011040100A1/fr

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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/10—Structure or manufacture of housings or shields for heads
    • G11B5/105—Mounting of head within housing or assembling of head and housing
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/127—Structure or manufacture of heads, e.g. inductive
    • G11B5/31—Structure or manufacture of heads, e.g. inductive using thin films
    • G11B5/3109—Details
    • G11B5/313—Disposition of layers
    • G11B5/3133—Disposition of layers including layers not usually being a part of the electromagnetic transducer structure and providing additional features, e.g. for improving heat radiation, reduction of power dissipation, adaptations for measurement or indication of gap depth or other properties of the structure
    • G11B5/314—Disposition of layers including layers not usually being a part of the electromagnetic transducer structure and providing additional features, e.g. for improving heat radiation, reduction of power dissipation, adaptations for measurement or indication of gap depth or other properties of the structure where the layers are extra layers normally not provided in the transducing structure, e.g. optical layers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B5/60—Fluid-dynamic spacing of heads from record-carriers
    • G11B5/6005—Specially adapted for spacing from a rotating disc using a fluid cushion
    • G11B5/6088—Optical waveguide in or on flying head
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B2005/0002—Special dispositions or recording techniques
    • G11B2005/0005—Arrangements, methods or circuits
    • G11B2005/0021—Thermally assisted recording using an auxiliary energy source for heating the recording layer locally to assist the magnetization reversal

Definitions

  • the present invention relates to an optical head, an optical recording apparatus, and an optical head fixing method.
  • the magnetic bit is significantly affected by the external temperature and the like. For this reason, a recording medium having a high holding force is required.
  • a magnetic field required for recording increases.
  • the upper limit of the magnetic field generated by the recording head is determined by the saturation magnetic flux density, but its value approaches the material limit and cannot be expected to increase dramatically. Therefore, the recording is performed by locally heating at the time of recording to cause magnetic softening, and recording is performed in a state where the holding force is small, and then the heating is stopped and the natural bit is cooled, thereby guaranteeing the stability of the recorded magnetic bit. Recording methods have been proposed. This recording method is called a heat-assisted magnetic recording method.
  • the heat-assisted magnetic recording method it is desirable to instantaneously heat the recording medium. Further, the heating mechanism and the recording medium are not allowed to contact each other. For this reason, heating is generally performed using absorption of light, and a method using light for heating is called a light assist method.
  • a method using light for heating is called a light assist method.
  • the required spot diameter is about 20 nm.
  • the light cannot be condensed to that extent.
  • an optical head using near-field light (sometimes referred to as near-field light) generated from an optical aperture having a size equal to or smaller than the incident light wavelength is used.
  • the optical head receives light from a light source, generates near-field light, and heats a disk area smaller than the diffraction limit of the light, and is provided on the slider to guide light from the light source to the slider.
  • an optical element (deflection prism) In such an optical head, the light emitted from the light source is guided to the optical element (deflection prism) by the optical fiber, and the light emitted from the optical fiber is reflected to the slider side inside the optical element, and the proximity provided on the slider. Irradiate the field light generator.
  • a near-field light generating unit provided on the slider generates near-field light, heats a disk area smaller than the light diffraction limit, and only the heated disk area is magnetically recorded. .
  • a flexure (plate spring) is provided at the tip of the suspension, and the optical head is provided on the flexure so that the optical head floats at a fixed relative position with respect to the recording medium.
  • a V-shaped groove (V-groove) for fixing the optical fiber is formed in the reflecting portion, and the optical fiber is made into a V-groove using an adhesive. Glued and fixed.
  • an adhesive escape portion intersecting with the V-groove portion is provided in the optical element so that the adhesive does not flow out and adhere to the reflecting surface when the optical fiber is bonded to the V-groove portion. A large amount of adhesive was released to the adhesive escape portion (for example, Patent Document 1).
  • the surface on which the V-groove portion is formed and the slider are bonded. Furthermore, by providing the slider with a convex protrusion that fits into the adhesive escape portion, the bonding area between the optical element and the slider is widened to increase the bonding strength and increase the mechanical strength.
  • Patent Document 1 discloses a structure for increasing the adhesive strength between the slider and the optical element, but does not disclose the fixing between the optical head and the flexure.
  • an optical element that guides light to the slider is added to the optical head, so that the weight of the optical head increases by the amount of the optical element. Therefore, the adhesive strength between the optical head and the flexure needs to be higher than that of the optical head in which no optical element is installed. Further, when the optical head is assembled, even if tension due to the drawing of the optical fiber is applied to the optical element and the flexure, the adhesive strength is required so that the optical element does not peel from the flexure.
  • the present invention solves the above-described problems, and an object thereof is to provide an optical head capable of increasing the adhesive strength with a flexure, and an optical recording apparatus including the optical head. It is another object of the present invention to provide an optical head fixing method for fixing an optical head to a flexure.
  • a first aspect of the present invention includes a slider that irradiates a recording medium with light emitted from a light source, and an optical element that is provided on the slider and guides light emitted from the light source to the slider.
  • An optical head in which a flexure tongue portion provided in a portion is bonded to the optical element and moves relative to the recording medium, and the optical element causes light emitted from the light source to enter the inside.
  • the optical surface of the flexure tongue piece is provided on an incident surface, a deflection surface that deflects light incident on the incident surface and guides the light to the slider, and a surface opposite to the surface facing the slider.
  • An optical head comprising: an adhesive reservoir having an area larger than an area of a surface to be bonded to the element.
  • a second aspect of the present invention includes a recording medium, a slider that irradiates the recording medium with light emitted from a light source, and an optical element that is provided on the slider and guides the light emitted from the light source to the slider.
  • the adhesive is preferably a photo-curable adhesive.
  • the adhesive reservoir has a hollow shape, and the adhesive reservoir is provided with a protrusion having a height lower than the depth of the adhesive reservoir.
  • an opening is formed in a part of the tongue piece.
  • the adhesive flows out through the opening to the surface of the tongue piece that is opposite to the surface that adheres to the optical element.
  • either one of the incident surface and the deflection surface has an optical power for converging light emitted from the light source.
  • the incident surface is preferably an aspherical surface.
  • the deflection surface is preferably a spheroid or a paraboloid.
  • the optical element may further include a light guide that guides light emitted from the light source to the incident surface, and a fixing portion that fixes the light guide to a surface side on which the incident surface is formed. preferable.
  • a lens that allows the light emitted from the light source to enter the incident surface.
  • an optical head having a slider that irradiates a recording medium with light emitted from a light source, and an optical element that is provided on the slider and guides light emitted from the light source to the slider.
  • An adhesive reservoir having an area larger than the area, and a step of applying a photocurable adhesive to the adhesive reservoir, and the adhesive reservoir to which the photocurable adhesive is applied.
  • a method of fixing an optical head comprising: a step of bringing a tongue piece portion of a flexure into contact; and a step of curing the photocurable adhesive by irradiating the photocurable adhesive with light. is there.
  • the optical element is provided with an adhesive reservoir having a larger area than the area of the surface of the flexure tongue that contacts the optical element.
  • the adhesive is applied to the entire surface of the adhesive reservoir, and the tongue piece of the flexure is pressed against the adhesive reservoir, thereby covering the peripheral portion of the tongue piece.
  • the peripheral portion of the tongue piece is bonded and fixed in a state of being sandwiched by the adhesive, so that the optical head and the flexure are It becomes possible to bond more firmly.
  • FIG. 1 is a perspective view of an optical element according to a first embodiment of the present invention.
  • FIG. 4 is a cross-sectional view of the optical element according to the first embodiment of the present invention, and is a cross-sectional view taken along the line IV-IV of the optical element shown in FIG.
  • FIG. 5 is a cross-sectional view of the optical element according to the first embodiment of the present invention, taken along the line VV of the optical element shown in FIG. 3. It is sectional drawing of the optical head and head support part which concern on 1st Embodiment of this invention.
  • FIG. 1 is a perspective view of an optical head according to a first embodiment of the present invention and an enlarged sectional view around an adhesive reservoir. It is a figure which shows the tongue piece part of the flexure which concerns on the modification 1.
  • FIG. 10 is a cross-sectional view of an optical element and a head support according to Modification 2.
  • FIG. 10 is a cross-sectional view of an optical element and a head support unit according to Modification 3.
  • FIG. It is a perspective view of the optical element which concerns on 2nd Embodiment of this invention.
  • FIG. 12 is a cross-sectional view of an optical element according to a second embodiment of the present invention, which is a cross-sectional view of the optical element shown in FIG. 11 taken along the line XII-XII.
  • FIG. 12 is a cross-sectional view of an optical element according to a second embodiment of the present invention, which is a cross-sectional view of the optical element shown in FIG. 11 taken along the line XII-XI
  • FIG. 12 is a cross-sectional view of an optical element according to a second embodiment of the present invention, which is a cross-sectional view of the optical element shown in FIG. It is an expanded sectional view of the tongue piece part of the optical element and flexure which concern on 2nd Embodiment of this invention. It is a perspective view which shows another example of the optical element which concerns on 2nd Embodiment of this invention. It is a perspective view which shows another example of the optical element which concerns on 2nd Embodiment of this invention. It is a perspective view which shows another example of the optical element which concerns on 2nd Embodiment of this invention. It is a perspective view which shows another example of the optical element which concerns on 2nd Embodiment of this invention. It is a perspective view of the optical element and the tongue piece part of a flexure which concern on 3rd Embodiment of this invention.
  • FIG. 1 shows a schematic configuration of an optical recording apparatus (for example, a hard disk apparatus) equipped with an optically assisted magnetic recording head.
  • the optical recording apparatus 1 includes a plurality of recording disks (magnetic recording media) 2, a head support 4, a tracking actuator 6, and an optically assisted magnetic head 3 (hereinafter “optical head 3”). And a driving device (not shown) in the housing 1A.
  • the head support portion 4 is provided to be rotatable in the direction of arrow A (tracking direction) with the support shaft 5 as a fulcrum.
  • the tracking actuator 6 is attached to the head support portion 4.
  • the optical head 3 is attached to the tip of the head support 4.
  • a drive device (not shown) rotates the disk 2 in the direction of arrow B.
  • the optical recording apparatus 1 is configured such that the optical head 3 can move relatively while flying over the disk 2.
  • FIG. 2 is an exploded perspective view of the optical head 3 and the head support unit 4 according to the first embodiment.
  • the optical head 3 is an optical head that uses light for information recording on the disk 2 and includes an optical element 31 and a slider 32.
  • the head support portion 4 includes a suspension arm 41 and a flexure (plate spring) 44.
  • the suspension arm 41 and the flexure 44 are fixed by welding or the like.
  • a rectangular opening 42 is formed at the tip of the suspension arm 41.
  • a pivot (protruding portion) 43 that protrudes toward the inside of the opening 42 is provided on one side of the opening 42.
  • a rectangular opening 45 is formed at the tip of the flexure 44.
  • a tongue piece 46 having a flat surface is provided on one side of the opening 45. The tongue piece 46 protrudes toward the inside of the opening 45, and is further bent and protruded in a direction perpendicular to the plate-like surface of the flexure 44.
  • the optical element 31 has an adhesive reservoir 31g having a recessed shape on the surface (upper surface 31a) opposite to the surface (lower surface 31b) in contact with the slider 32. ing.
  • the tongue piece 46 of the flexure 44 is bonded to the adhesive reservoir 31g via an adhesive.
  • the area of the adhesive reservoir 31g is wider than the area of the surface of the tongue piece 46 that contacts the adhesive reservoir 31g.
  • the opening 42 and the pivot 43 are provided on the suspension arm 41 so that the pivot 43 provided on the suspension arm 41 abuts near the center of the tongue piece 46. Then, the pivot 43 comes into contact with the vicinity of the center of the tongue piece 46 and presses the tongue piece 46 toward the optical element 31.
  • the optical element 31 will be described with reference to FIGS. 4 is a sectional view taken along the line IV-IV in FIG. 3, and FIG. 5 is a sectional view taken along the line VV in FIG.
  • the optical element 31 has a concave adhesive reservoir 31 g formed on the upper surface 31 a opposite to the lower surface 31 b in contact with the slider 32.
  • the optical element 31 is formed with a recess 31 c on the lower surface 31 b side in contact with the slider 32.
  • the depression 31c has an opening on the side of the lower surface 31b in contact with the slider 32 and an incident surface 31e on the closed side.
  • a fixing portion 31d for fixing the optical fiber 300 which is a linear light guide that guides light from a light source (not shown), is formed in the recess 31c.
  • the fixing portion 31d is, for example, a V-shaped groove portion, and the optical fiber 300 is bonded and fixed to the groove portion.
  • the entrance surface 31e is an aspherical surface that is rotationally symmetric with respect to the optical axis and has a positive optical power.
  • the incident surface 31 e allows light emitted from the optical fiber 300 to enter the optical element 31.
  • a part of the upper surface 31a of the optical element 31 is inclined, and the inclined surface is a deflection surface 31f.
  • the light incident from the incident surface 31e reaches the deflection surface 31f.
  • the deflecting surface 31 f is a flat surface, and reflects the light incident on the incident surface 31 e and guides it to the optical waveguide 32 a provided on the slider 32.
  • the slider 32 includes an optical waveguide 32a, a magnetic recording unit 32b, and a magnetic reproducing unit 32c.
  • the optical waveguide 32 a guides the light spot formed by the incident surface 31 e and the deflection surface 31 f of the optical element 31 and emits it toward the disk 2.
  • the magnetic recording unit 32 b writes magnetic information to the recording portion of the disk 2.
  • the magnetic reproducing unit 32 c reads magnetic information recorded on the disk 2.
  • the magnetic reproducing unit 32c, the optical waveguide 32a, and the magnetic recording unit 32b are arranged in this order from the entry side to the exit side (the direction of the arrow in FIG. 6) of the recording area of the disk 2. The order is not limited to this order. Since the magnetic recording unit 32b may be positioned immediately after the exit side of the optical waveguide 32a, for example, the optical waveguide 32a, the magnetic recording unit 32b, and the magnetic reproducing unit 32c may be arranged in this order.
  • the optical element 31 is made of an optically transparent resin or glass.
  • the optical element 31 is manufactured by injection molding, an imprint manufacturing method, a glass mold method, or the like.
  • the resin for injection molding include polycarbonate which is a thermoplastic resin (for example, AD5503, Teijin Chemicals Ltd.) and ZEONEX 480R (Nippon Zeon Corporation).
  • the resin for imprint manufacturing include PAK-02 (Toyo Gosei Co., Ltd.), which is a photocurable resin.
  • FIG. 7 the perspective view of the optical element 31 and the tongue piece part 46, and the expanded sectional view of the adhesive reservoir part 31g vicinity are shown.
  • the adhesive 50 is applied to the adhesive reservoir 31g of the optical element 31, and the tongue piece 46 is pressed against the adhesive reservoir 31g.
  • a photocurable adhesive such as an ultraviolet curable adhesive is used for the adhesive 50.
  • the adhesive 50 flows into the upper surface of the tongue piece 46.
  • the adhesive 50 is cured by irradiating the adhesive 50 with ultraviolet rays.
  • the optical element 31 is optically transparent and transmits ultraviolet light
  • the ultraviolet light is irradiated toward the adhesive 50 also from the side surface of the optical element 31.
  • sufficient ultraviolet light is also applied to the adhesive 50 between the flexure 44 and the adhesive reservoir 31g of the optical element 31, and the portion behind the flexure 44 can also be bonded and fixed. it can.
  • the adhesive 50 can be cured by irradiating the adhesive surface with ultraviolet rays through the optical element 31, so that the adhesive can be fixed in a short time.
  • thermosetting adhesive is mainly used for bonding the slider and the flexure. Since the thermosetting adhesive needs to be cured for a long time (for example, 120 ° C., 45 minutes) in a high temperature furnace, the manufacturing time of the optical head becomes long. On the other hand, in the optical head 3 according to this embodiment, since the optical element 31 is made of resin and the adhesive 50 is made of an ultraviolet curable adhesive, the time required for bonding can be shortened. It becomes possible.
  • the head unit in which the optical fiber 300 is integrated with the optical head 3 including the optical element 31 and the slider 32 is bonded to the adhesive reservoir 31g formed on the optical element 31 and fixed to the flexure 44. Is held by the suspension arm 41.
  • the surface of the slider 32 facing the disk 2 has an air bearing surface (also referred to as an ABS (Air Bearing Surface) surface) for improving the flying characteristics.
  • ABS Air Bearing Surface
  • the flying of the slider 32 needs to be stabilized in the state of being close to the disk 2, and it is necessary to appropriately apply a pressure for suppressing the flying force to the slider 32.
  • the head support portion 4 fixed on the optical element 31 has a function of appropriately applying a force for suppressing the flying force of the slider 32 in addition to the function of tracking the optical head 3.
  • the balance between the force and the slider 32 and the disk 2 can maintain a flying height of several tens of nanometers.
  • the disk 2 can be heated even with near-field light that exists only on the surface.
  • the slider 32 moves relative to the disk 2 which is a magnetic recording medium while flying, but there is a possibility of contact with the disk 2 if there is dust or a defect on the medium.
  • a hard material having high friction resistance as the material of the slider 32.
  • a ceramic material containing Al 2 O 3 , AlTiC, zirconia, TiN, or the like may be used.
  • a surface treatment may be performed on the surface of the slider 32 on the disk 2 side in order to increase the friction resistance.
  • a DLC Diamond Like Carbon
  • the operation of the optical head 3 having the above configuration will be described with reference to FIG.
  • Light emitted from a light source (not shown) is guided to the optical element 31 by the optical fiber 300.
  • the light guided by the optical fiber 300 is, for example, light emitted by a semiconductor laser.
  • the wavelength of this light is preferably a near infrared wavelength of 1.2 ⁇ m or more (the near infrared band is about 0.8 ⁇ m to 2 ⁇ m, and specific wavelengths include 830 nm, 1310 nm, 1550 nm, etc.).
  • the light emitted from the exit end face of the optical fiber 300 reaches the entrance surface 31 e while spreading and enters the optical element 31. Since the incident surface 31e has a positive optical power that is an aspherical surface, the light emitted from the optical fiber 300 is converted into convergent light by the incident surface 31e and reaches the deflecting surface 31f. The light reaching the deflection surface 31f is reflected by the deflection surface 31f and deflected in the direction in which the slider 32 is attached. The light reflected by the deflecting surface 31f is perpendicularly incident on the incident end face of the optical waveguide 32a included in the slider 32, and forms a light spot to be coupled.
  • the formed light spot is guided along the optical waveguide 32 a of the slider 32 toward the disk 2 and irradiates a near-field generating unit (not shown) provided on the bottom surface of the slider 32.
  • Near-field light is generated toward the disk 2 by the near-field generator.
  • the optical axis of the light beam incident on the optical waveguide 32a is preferably perpendicular to the incident end face of the optical waveguide 32a from the viewpoint of optical coupling efficiency.
  • the magnetic recording unit 32b When the region where the holding force is reduced reaches the magnetic recording unit 32b, information is recorded in the region where the holding force is reduced by a magnetic field generated by a coil (not shown) installed in the magnetic recording unit 32b.
  • a coil not shown
  • the magnetic reproducing unit 32c reproduces information by detecting the recorded magnetization direction.
  • the adhesive reservoir having an area larger than the area of the tongue piece portion 46 of the flexure 44 on the upper surface 31a of the optical element 31 (surface to be bonded to the flexure 44).
  • a portion 31g is provided.
  • the adhesive 50 is applied to the entire surface of the adhesive reservoir 31g, and the tongue piece portion 46 of the flexure 44 is pressed against the adhesive reservoir 31g, as shown in the enlarged sectional view of FIG.
  • the adhesive 50 covers the periphery of the piece 46.
  • the peripheral portion of the tongue piece portion 46 is bonded and fixed in a state of being sandwiched by the adhesive 50, so that it is stronger. Bonding becomes possible. Therefore, it is possible to realize a highly reliable optical head 3 in which separation between the optical head 3 and the flexure 44 hardly occurs.
  • the incident surface 31e is aspherical to give optical power and the light emitted from the light source is condensed on the optical waveguide 32a of the slider 32, a lens such as a gradient index lens (GRIN lens) is attached.
  • GRIN lens gradient index lens
  • Modification 1 Next, Modification 1 will be described with reference to FIG.
  • the adhesive 50 covers the peripheral portion of the tongue piece 46 by pressing the tongue piece 46 against the adhesive reservoir 31g.
  • the pivot 43 provided on the suspension arm 41 abuts near the center of the tongue piece 46 provided on the flexure 44 and presses the tongue piece 46 toward the optical element 31. Therefore, it is preferable that the region where the pivot 43 abuts is flat in the tongue piece portion 46 so that force is uniformly applied to the tongue piece portion 46 from the pivot 43. Further, it is preferable that the adhesive does not flow into a region where the tongue piece portion 46 abuts.
  • a protrusion 47 is provided in a region (for example, near the center) where the pivot 43 abuts in the tongue piece 46. That is, the height of the area where the pivot 43 abuts is made higher than the height of the peripheral area of the area where the pivot 43 abuts. As a result, even if the adhesive 50 flows inward from the periphery of the tongue piece 46, the adhesive 50 does not flow into the area where the pivot 43 abuts, so that the area where the pivot 43 abuts can be kept flat. Then, the tongue 43 is pressed against the optical element 31 by the pivot 43 coming into contact with the protrusion 47.
  • a step portion may be provided in the peripheral portion of the tongue piece portion 46 so that the adhesive 50 does not flow into the region where the pivot 43 abuts.
  • This step portion is shown in FIGS. 8B and 8C.
  • FIG. 8B is a perspective view of the tongue piece portion 46
  • FIG. 8C is a cross-sectional view of the tongue piece portion AA.
  • a stepped portion 48 having a predetermined height is provided at a position inside a predetermined distance from the edge 46 a of the tongue piece 46. That is, the stepped portion 48 is provided so as to surround a region 46 b including the vicinity of the center where the pivot 43 abuts in the tongue piece portion 46.
  • the stepped portion 48 is formed at a position on the inner side by a predetermined distance from the edge 46a by bending the peripheral portion of the tongue piece portion 46 inward. Then, the adhesive 50 is applied to the adhesive reservoir 31g and the tongue piece 46 of the flexure 44 is pressed against the adhesive reservoir 31g, so that the adhesive 50 covers the peripheral portion of the tongue piece 46.
  • the step portion 48 is provided at a position a predetermined distance from the edge portion 46 a of the tongue piece portion 46, the adhesive 50 riding on the peripheral portion of the tongue piece portion 46 is It does not flow from the peripheral part to the region 46b where the pivot 43 abuts. As a result, the region where the pivot 43 abuts can be kept flat.
  • Modification Example 2 of the optical element according to the first embodiment will be described with reference to FIG.
  • a light source such as a laser diode (LD)
  • LD laser diode
  • a heat radiating plate 320 for radiating heat generated by the light source 310 may be provided.
  • the light source 310 is provided inside the optical element 31 via the heat radiating plate 320.
  • the optical element 31 according to the modification 2 is configured to directly provide the light source 310 instead of the optical fiber 300, and the configuration other than the light source is the same as the optical element 31 according to the first embodiment described above.
  • the light emitted from the light source 310 enters the inside of the optical element 31 from the incident surface 31e of the optical element 31 as in the first embodiment described above. Then, the light is deflected by the deflecting surface 31f of the optical element 31 to be converged light and incident perpendicularly on the incident end face of the optical waveguide 32a provided in the slider 32, and a light spot is formed and coupled.
  • Modification Example 3 of the optical element according to the first embodiment will be described with reference to FIG.
  • the light from the light source is guided to the optical element 31 without using the optical fiber.
  • the light source unit 60 is provided on the support arm 41 a installed on the opposite side of the suspension arm 41 from the tip where the flexure 44 is installed.
  • the light source unit 60 includes a light source 61 and a lens 62.
  • As the light source 61 a laser diode (LD) or the like is used.
  • the lens 62 condenses the light emitted from the light source 61 at a predetermined magnification, and causes the light to enter the incident surface 31 e of the optical element 31.
  • LD laser diode
  • the light emitted from the light source 61 is applied to the incident surface 31e of the optical element 31 by the lens 62 without using an optical fiber or the like.
  • the configuration of the optical element 31 according to Modification 3 other than the light source is the same as that of the optical element 31 according to the first embodiment.
  • the optical element 33 is used instead of the optical element 31 according to the first embodiment.
  • the adhesive reservoir 31g formed on the upper surface 31a of the optical element 33 is provided with a plurality of convex protrusions 31h protruding in a direction perpendicular to the upper surface 31a.
  • structures other than the protrusion part 31h provided in the adhesive reservoir part 31g are the same as the optical element 31 which concerns on 1st Embodiment, description is abbreviate
  • the height h of the protrusion 31h (the length in the direction perpendicular to the upper surface 31a) is lower than the depth d of the adhesive reservoir 31g. Therefore, as shown in the enlarged sectional view of FIG. 14, even when the adhesive 50 is applied to the adhesive reservoir 31g and the tongue piece 46 of the flexure 44 is pressed against the adhesive reservoir 31g, the tongue piece An adhesive layer having a thickness h is secured between 46 and the bottom surface of the adhesive reservoir 31g. Moreover, the adhesive agent 50 covers the peripheral part of the tongue piece part 46 similarly to the optical element 31 according to the first embodiment.
  • the adhesive 50 is interposed between the tongue piece 46 and the bottom surface of the adhesive reservoir 31g, and the adhesive 50 covers the peripheral portion of the tongue piece 46, a stronger interview is achieved. Wearing is possible.
  • the plurality of protrusions 31h are provided in the adhesive reservoir 31g, the adhesive area between the tongue piece 46 and the adhesive reservoir 31g is further expanded, and the adhesive strength can be further increased. Further, even if the force with which the pivot 43 pushes the tongue piece portion 46 of the flexure 44 varies, the adhesive layer having a predetermined thickness is secured, so that it can be firmly bonded and fixed.
  • the columnar protrusion 31h is provided in the adhesive reservoir 31g.
  • other shapes such as a prismatic protrusion may be provided.
  • a plurality of linear protrusions 31k extending in the short direction of the optical element 34 may be provided in the adhesive reservoir 31g.
  • a plurality of protrusions 31m extending in the longitudinal direction of the optical element 35 may be provided in the adhesive reservoir 31g.
  • the protrusion 31k formed on the optical element 34 and the protrusion 31m formed on the optical element 35 are linear protrusions extending in directions orthogonal to each other.
  • a lattice-like protrusion 31n composed of linear protrusions extending in different directions may be provided in the adhesive reservoir 31g.
  • the height h of the protrusion 31k, the protrusion 31m, and the protrusion 31n is lower than the depth d of the adhesive reservoir 31g.
  • the opening 49 is formed near the center of the tongue piece 46 of the flexure 44.
  • the circular opening 49 is formed near the center of the tongue piece 46. Since the configuration other than the opening 49 formed near the center of the tongue piece 46 is the same as that of the optical element 31 according to the first embodiment, the description of the configuration of the common portion is omitted.
  • the tongue piece part 46 in which the opening part 49 was formed is pressed on the adhesive reservoir 31g to which the adhesive 50 was applied.
  • the adhesive 50 opposes the upper surface of the tongue piece portion 46 through the opening 49 of the tongue piece portion 46 (facing the adhesive reservoir portion 31 g).
  • the adhesive 51 is an adhesive that has flowed out to the upper surface of the tongue piece 46. In this state, the adhesives 50 and 51 are cured by irradiating ultraviolet rays, whereby the opening 49 of the tongue piece 46 is fixed in a rivet shape. Accordingly, the flexure 44 and the optical element 31 can be bonded and fixed with higher strength together with the adhesive covering the periphery of the tongue piece 46.
  • one opening 49 is formed at the center of the tongue piece 46, but a plurality of openings may be formed in the tongue piece 46.
  • the incident surface 31e is an aspherical surface to provide optical power
  • the deflection surface 31f is a flat surface.
  • the incident surface 31q is a plane
  • the deflection surface 31r is a spheroidal surface, a paraboloid of revolution, or the like.
  • Optical power is given as a similar surface shape. As shown in FIGS.
  • a fixing portion 31 p for fixing the optical fiber 300 is formed on the upper surface 31 a of the optical element 37.
  • the fixing portion 31p is, for example, a V-shaped groove portion, and the optical fiber 300 is bonded and fixed to the groove portion.
  • the tip of the optical fiber 300 is joined to the incident surface 31q. Since the configuration other than the incident surface 31q, the deflection surface 31r, and the fixed portion 31p is the same as that of the optical element 31 according to the first embodiment, the description of the configuration of the common parts is omitted.
  • the light emitted from the optical fiber 300 enters the optical element 37 from the incident surface 31q and reaches the deflection surface 31r.
  • the light reaching the deflection surface 31r is deflected by the deflection surface 31r in the direction in which the slider 32 is attached. Since the deflection surface 31r has a spheroidal surface, a paraboloidal surface, or a similar surface shape, the light is converted into convergent light by the deflection surface 31r and reaches the slider 32. Then, the light beam deflected by the deflecting surface 31r is perpendicularly incident on the incident end surface of the optical waveguide 32a included in the slider 32, and forms a light spot to be coupled.
  • the optical according to the first embodiment is used. Similar to the element 31, there is no need to install an expensive fiber with a lens. Therefore, the manufacturing cost of the optical head 3 can be suppressed.
  • the incident surface may be a spherical surface or an aspherical surface to provide optical power
  • the deflecting surface may be a spheroidal surface, a paraboloidal surface, or a similar shape to provide optical power. As described above, the optical power may be distributed to the incident surface and the deflecting surface.
  • FIG. 22 shows another example of the optical element according to the fourth embodiment.
  • a plurality of protrusions 31h having a height h may be provided on the adhesive reservoir 31g formed on the upper surface 31a.
  • a light source such as a laser diode may be mounted on the optical elements 37 and 38, or a lens. The light may be guided to the incident surface 31q via.
  • the adhesive reservoir 31g, the deflecting surface 31r, and the fixing portion 31p that is a V-shaped groove are opposite to the surface facing the slider 32. Therefore, the shapes of the optical elements 37 and 38 can be easily formed by the imprint method. Unlike the optical elements 37 and 38 according to the fourth embodiment, since the adhesive reservoir 31g, the deflection surface 31r, and the fixing portion 31p are formed on one surface, unlike injection molding or glass molding, According to the imprint method, the optical elements 37 and 38 can be manufactured using only the upper mold. As a result, the manufacturing cost of the optical element can be suppressed.
  • a flat transparent substrate 70 is prepared.
  • the transparent substrate 70 include glass-made ABC (manufactured by Nippon Electric Glass).
  • FIG. 23B a predetermined amount of the ultraviolet curable resin 101 is dropped onto one surface of the transparent substrate 70 using the resin coating apparatus 100.
  • FIG. 23C shows a state in which a predetermined amount of the ultraviolet curable resin 102 is applied to the surface of the transparent substrate 70.
  • the mold 111 is lowered toward the transparent substrate 70 from above the ultraviolet curable resin 102 using the mold lifting device 110.
  • the mold 111 is formed with an adhesive reservoir 31g, a fixing portion 31p which is a V-shaped groove, and a space 112 for transferring the shape of the deflection surface 31r. Then, as shown in FIG. 23 (e), the mold 111 is pressed against the ultraviolet curable resin 102 so that the mold 111 is placed at a predetermined position with respect to the transparent substrate 70. Align. Then, as shown in FIG. 23 (f), the ultraviolet curable resin 102 is cured by irradiating the ultraviolet curable resin 102 with ultraviolet rays from the direction of the transparent substrate 70 made of glass. As shown in FIG. 23G and FIG. 23H, after the ultraviolet curable resin 102 is cured, the mold 111 is raised. Thereby, the optical element 37 is formed on one surface of the transparent substrate 70. Then, as shown in FIG. 23 (i), the optical element 37 is taken out by peeling the optical element 37 from the transparent substrate 70.
  • the optical element is manufactured by the imprint method, but the optical element may be manufactured by an injection molding method or a glass mold method.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Optical Head (AREA)

Abstract

L'invention a pour objet une tête optique dans laquelle la force de liaison entre une courbure et elle-même est renforcée. A cet effet, la tête optique (3) comprend une coulisse (32) permettant d'irradier de la lumière émise depuis une source de lumière vers un support d'enregistrement et un élément optique (31) disposé sur la coulisse et utilisé pour guider la lumière émise depuis la source de lumière vers la coulisse. Une partie de regroupement adhésive (31g) est disposée sur la surface supérieure (31a) de l'élément optique (31), et une partie formant languette (46) est disposée à une extrémité de la courbure (44). L'aire de la partie de regroupement adhésive (31g) est plus grande que l'aire d'une surface de la partie formant languette (46), la surface étant liée à l'élément optique (31). La tête optique (3) est liée et fixée à la courbure (44) par revêtement d'un adhésif sur la partie de regroupement adhésive (31g) et par pression de la partie formant languette (46) contre la partie de regroupement adhésive (31g).
PCT/JP2010/061028 2009-09-29 2010-06-29 Tête optique, dispositif d'enregistrement optique et procédé permettant de fixer une tête optique WO2011040100A1 (fr)

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JP2009-224843 2009-09-29
JP2009224843 2009-09-29

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60163286A (ja) * 1983-12-30 1985-08-26 Fujitsu Ltd 磁気ヘッド組立体およびその製造方法
JPH04162272A (ja) * 1990-10-25 1992-06-05 Sony Corp 磁気ヘッドスライダ
JPH0660582A (ja) * 1992-08-06 1994-03-04 Matsushita Electric Ind Co Ltd 浮動型磁気ヘッド装置
WO2008081909A1 (fr) * 2006-12-27 2008-07-10 Fujitsu Limited Ensemble de suspension de tête, ensemble de chariot et procédé de fabrication d'un ensemble de coulisseau de tête
JP2009015957A (ja) * 2007-07-04 2009-01-22 Konica Minolta Opto Inc 光学素子及び光ヘッド
JP2009104734A (ja) * 2007-10-25 2009-05-14 Konica Minolta Opto Inc 微小スポット生成構造及び光ヘッド

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60163286A (ja) * 1983-12-30 1985-08-26 Fujitsu Ltd 磁気ヘッド組立体およびその製造方法
JPH04162272A (ja) * 1990-10-25 1992-06-05 Sony Corp 磁気ヘッドスライダ
JPH0660582A (ja) * 1992-08-06 1994-03-04 Matsushita Electric Ind Co Ltd 浮動型磁気ヘッド装置
WO2008081909A1 (fr) * 2006-12-27 2008-07-10 Fujitsu Limited Ensemble de suspension de tête, ensemble de chariot et procédé de fabrication d'un ensemble de coulisseau de tête
JP2009015957A (ja) * 2007-07-04 2009-01-22 Konica Minolta Opto Inc 光学素子及び光ヘッド
JP2009104734A (ja) * 2007-10-25 2009-05-14 Konica Minolta Opto Inc 微小スポット生成構造及び光ヘッド

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