WO2009148012A1 - 熱アシスト磁気記録ヘッド及びヘッドアッセンブリ - Google Patents
熱アシスト磁気記録ヘッド及びヘッドアッセンブリ Download PDFInfo
- Publication number
- WO2009148012A1 WO2009148012A1 PCT/JP2009/059968 JP2009059968W WO2009148012A1 WO 2009148012 A1 WO2009148012 A1 WO 2009148012A1 JP 2009059968 W JP2009059968 W JP 2009059968W WO 2009148012 A1 WO2009148012 A1 WO 2009148012A1
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- WIPO (PCT)
- Prior art keywords
- magnetic recording
- submount
- emitting element
- light
- assisted magnetic
- Prior art date
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Classifications
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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
- G11B5/127—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
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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
- G11B5/48—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
- G11B5/4806—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 specially adapted for disk drive assemblies, e.g. assembly prior to operation, hard or flexible disk drives
- G11B5/4826—Mounting, aligning or attachment of the transducer head relative to the arm assembly, e.g. slider holding members, gimbals, adhesive
-
- 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
- G11B5/4806—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 specially adapted for disk drive assemblies, e.g. assembly prior to operation, hard or flexible disk drives
- G11B5/4853—Constructional details of the electrical connection between head and arm
-
- 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
- G11B2005/001—Controlling recording characteristics of record carriers or transducing characteristics of transducers by means not being part of their structure
-
- 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 a heat-assisted magnetic recording head and a head assembly, and more particularly to a technique for providing a submount for mounting a light emitting element.
- thermally assisted magnetic recording has been proposed as one technique for improving the recording density of a magnetic disk device.
- This heat-assisted magnetic recording is a technique for recording data by applying a magnetic field and heat to a minute region of a recording medium.
- a near-field optical element is considered as a means for heating a minute region of the recording medium.
- This near-field optical element is provided in the vicinity of the magnetic recording element of the head slider, and heats a minute region of the recording medium by converting light guided from an external light emitting element into near-field light and outputting it.
- Japanese Patent Application Laid-Open No. 2007-335027 discloses a heat-assisted magnetic recording head in which a submount for mounting a light emitting element is provided between a head support member and a head slider.
- the present invention has been made in view of the above circumstances, and in a thermally-assisted magnetic recording head provided with a submount for mounting a light emitting element, a terminal provided on a head slider and a head support member are provided. It is a main object of the present invention to provide a thermally-assisted magnetic recording head and a head assembly that can be appropriately electrically connected to a terminal.
- a thermally assisted magnetic recording head of the present invention includes a light emitting element, a submount on which the light emitting element is mounted and attached to a head support member, and at least a magnetic recording element, and is attached to the submount.
- the head assembly of the present invention includes the above-described heat-assisted magnetic recording head of the present invention.
- the submount includes a wiring that electrically connects a terminal provided in the light emitting element and a terminal provided in the head support member.
- the submount is formed with a recess that opens to the head support member side and accommodates the light emitting element, and a through hole that penetrates from the bottom of the recess to the head slider side.
- the light emitted from the light emitting element accommodated in the recess passes through the through hole and is incident on the receiving surface of the light conversion unit formed on the surface of the head slider on the submount side. Is done.
- the light emitting element is a laser diode having an output end that emits light in a direction intersecting the resonator direction, and the resonator direction is substantially parallel to the bottom of the recess. It may be accommodated in the recess and emit light from the output end toward the through hole.
- a first wiring connected to a terminal provided in the light emitting element is formed at the bottom of the recess, and the head support member is provided on a surface of the submount on the head slider side.
- a second wiring connected to a terminal provided in the hole is formed, and one end of the through hole is connected to the first wiring and the other end is connected to the second wiring on the side wall of the through hole.
- a wiring may be formed.
- the terminal provided on one main surface of the light emitting element is connected to the first wiring formed on the bottom of the recess, and the terminal provided on the other main surface of the light emitting element is:
- the head support member may be grounded.
- a plurality of first wirings respectively connected to a plurality of terminals provided on one main surface of the light emitting element are formed at the bottom of the recess, and the head slider side surface of the submount is formed on the bottom surface of the recess.
- a plurality of second wirings respectively connected to a plurality of terminals provided on the head support member are formed with a plurality of second wirings respectively connected to a plurality of terminals provided on the head support member, and one end of each of the side walls of the through hole is connected to the plurality of first wirings.
- a plurality of in-hole wirings whose other ends are respectively connected to the plurality of second wirings may be formed.
- the through hole may be filled with a waveguide member having translucency with respect to the light emitted from the light emitting element.
- a lens that condenses the light emitted from the light emitting element toward the receiving surface of the light conversion unit may be provided in the through hole.
- the submount is formed with a recess that opens toward the head slider and accommodates the light emitting element, and the light emitted from the light emitting element accommodated in the recess is The light is incident on the receiving surface of the light conversion unit formed on the surface of the head slider on the submount side.
- the light emitting element is a laser diode having an output end that emits light in a direction intersecting the resonator direction, and the resonator direction is substantially parallel to the bottom of the recess. You may make it light-emit from the said output edge part in the said recessed part toward the receiving surface of the said light conversion part.
- a plurality of first wirings respectively connected to a plurality of terminals provided on one main surface of the light emitting element are formed at the bottom of the recess, and the head slider of the submount is formed.
- a plurality of second wirings respectively connected to a plurality of terminals provided on the head support member are formed on the side surface, and one end of each side of the concave portion is connected to the plurality of first wirings.
- a plurality of sidewall wirings may be formed which are connected to each other and whose other ends are respectively connected to the plurality of second wirings.
- a base portion interposed between the head slider and a mirror is formed on an opposing surface of the submount facing the head slider, and the light emitting element faces the mirror.
- the light emitted from the light emitting element is mounted on the opposite surface so as to emit light, and is redirected by the mirror, and is received by the light conversion unit formed on the submount side surface of the head slider. Incident on the surface.
- the pedestal portion is formed of a waveguide member that is transparent to the light emitted from the light emitting element, and the light emitted from the light emitting element passes through the pedestal portion.
- the direction may be changed by the mirror so as to be incident on the receiving surface of the light conversion unit.
- a convex portion is formed on an attachment surface to which the head slider of the submount is attached, and the head slider is in a state where a part of the head slider is in contact with the top surface of the convex portion. Glued to the surface.
- the submount interposed between the head support member and the head slider has the wiring for electrically connecting the terminal provided on the head slider and the terminal provided on the head support member. Therefore, even if these terminals are separated from each other, it can be appropriately electrically connected through this wiring.
- FIG. 1 is a plan view of a magnetic disk device including a head assembly according to an embodiment of the present invention.
- 1 is a perspective view of a heat-assisted magnetic recording head (first example) according to an embodiment of the present invention.
- FIG. 3 is a cross-sectional view of a thermally assisted magnetic recording head according to a first example. It is a perspective view showing the upper surface side of the submount included in the heat-assisted magnetic recording head according to the first example. It is a perspective view showing the lower surface side of the submount included in the thermally-assisted magnetic recording head according to the first example.
- 2 is an enlarged cross-sectional view of a thermally-assisted magnetic recording head according to a first example.
- FIG. 2 is an enlarged cross-sectional view of a thermally-assisted magnetic recording head according to a first example.
- FIG. It is a perspective view showing the upper surface side of the submount contained in the heat-assisted magnetic recording head concerning the modification of the 1st example. It is a perspective view showing the lower surface side of the submount contained in the heat-assisted magnetic recording head concerning the modification of the 1st example.
- FIG. 6 is an enlarged cross-sectional view of a thermally assisted magnetic recording head according to a modification of the first example.
- FIG. 6 is an enlarged cross-sectional view of a thermally assisted magnetic recording head according to a modification of the first example.
- FIG. 6 is an enlarged cross-sectional view of a thermally assisted magnetic recording head according to a modification of the first example.
- FIG. 5 is a perspective view of a heat-assisted magnetic recording head (second example) according to an embodiment of the present invention. It is sectional drawing of the heat-assisted magnetic recording head of the 2nd example. It is a perspective view showing the lower surface side of the submount contained in the thermally assisted magnetic recording head concerning the 2nd example. It is an expanded sectional view of the thermally assisted magnetic recording head concerning the 2nd example. It is an expanded sectional view of the thermally assisted magnetic recording head concerning the 2nd example. It is an expanded sectional view of the thermally assisted magnetic recording head concerning the 2nd example.
- FIG. 6 is a perspective view of a thermally assisted magnetic recording head (third example) according to an embodiment of the present invention.
- FIG. 1 is a plan view of a magnetic disk device including a head assembly according to an embodiment of the present invention. In the figure, the top cover is not shown.
- a housing 2 of the magnetic disk device 1 houses a magnetic disk 3 and a head assembly 4.
- the magnetic disk 3 is attached to a spindle motor 5 provided at the bottom of the housing 2.
- the head assembly 4 is rotatably supported on the bottom of the housing 2 next to the magnetic disk 3.
- a head gimbal assembly (HGA) 41 as a head support member for supporting the thermally-assisted magnetic recording head 10 according to one embodiment of the present invention is attached to the front end side of the head assembly 4.
- the heat-assisted magnetic recording head 10 floats close to the magnetic disk 3 and records data by applying a magnetic field and heat to a predetermined area of the magnetic disk 3.
- a voice coil motor 6 is provided on the rear end side of the head assembly 4.
- the voice coil motor 6 rotates the head assembly 4 to move the heat-assisted magnetic recording head 10 on the magnetic disk 3 in a substantially radial direction.
- thermally assisted magnetic recording head 10A a first example (referred to as a thermally assisted magnetic recording head 10A) of the thermally assisted magnetic recording head 10 according to an embodiment of the present invention will be described.
- FIGS. 2 and 3 are a perspective view and a cross-sectional view of the heat-assisted magnetic recording head 10A.
- the heat-assisted magnetic recording head 10A attached to the HGA 41 is shown.
- FIG. 3 shows an outline of a cross section when the heat-assisted magnetic recording head 10 is cut at the center in the width direction.
- 4A and 4B are perspective views showing the upper surface side and the lower surface side of the submount 8A included in the heat-assisted magnetic recording head 10A.
- FIG. 5A is an enlarged view of a main part of FIG. 3A.
- the HGA 41 side is the upper side and the magnetic disk 3 side is the lower side with respect to the heat-assisted magnetic recording head 10A.
- the side corresponding to the front end side of the HGA 41 (that is, the air outflow side) is defined as the front, and the opposite side is defined as the rear.
- the heat-assisted magnetic recording head 10A includes a rectangular plate-shaped submount 8A on which a laser diode 7 as a light emitting element is mounted, a flat rectangular magnetic head slider 9 including a magnetic recording element 93 and a light conversion unit 95, and have.
- the submount 8A is attached to the lower side of the HGA 41, and the magnetic head slider 9 is attached to the lower surface 8d of the submount 8A.
- a flexure 413 is joined to the lower end of a dimple 415 provided on the load beam 412, and the submount 8A is attached to the lower surface of the flexure 413.
- the magnetic head slider 9 has an air bearing surface (ABS) on the medium facing surface 9d, which is the lower surface, and floats on the rotating magnetic disk 3 due to an air wedge film effect.
- the magnetic head slider 9 includes a magnetic recording element 93 and a light conversion unit 95 on the front side (air outflow side). These are formed on the end face of a slider substrate made of a sintered body (altic) of alumina and titanium carbide by a thin film forming technique.
- the magnetic recording element 93 is composed of an inductive element that generates a magnetic field corresponding to the current flowing through the coil.
- the magnetic head slider 9 also includes a magnetic reproducing element (not shown) constituted by a magnetoresistive effect element. These are electrically connected to a plurality of terminals 91 formed on an end surface 9e on the front side (air outflow side) of the magnetic head slider 9 by wiring (not shown).
- the light conversion unit 95 is formed so as to penetrate the magnetic head slider 9 in the vertical direction.
- the light converting unit 95 receives laser light emitted from the laser diode 7 from a receiving surface 95f (see FIG. 5A) formed on the upper surface 9f of the magnetic head slider 9, and generates a near field generated by the laser light.
- Light is output from an end face 95 d formed on the medium facing surface 9 d of the magnetic head slider 9.
- the light conversion unit 95 is preferably formed near the magnetic recording element 93.
- a near-field optical element 952 is provided at the lower end of the light conversion unit 95, and a waveguide unit 951 for guiding laser light from the receiving surface 95f to the light conversion unit 95 is provided above the optical conversion unit 95. .
- the near-field optical element 952 generates near-field light when plasmon resonance is excited by laser light.
- the waveguide portion 951 is made of a material that is transparent to laser light, such as quartz.
- the light conversion unit 95 is not limited to this example, and may be a so-called probe type in which the cross-sectional area of the waveguide is narrowed toward the lower end.
- the submount 8A is made of a material having a high thermal conductivity and a thermal expansion coefficient close to that of the laser diode 7, such as silicon or aluminum nitride. As shown in FIG. 4A, the submount 8A is formed with a recess 82A that opens to the upper surface 8f side for accommodating the laser diode 7.
- the recess 82A is formed in a flat rectangular shape having a relatively short vertical direction.
- a through hole 84 having a rectangular cross section extending in the width direction penetrating to the lower surface 8d side is formed in the front portion of the bottom of the recess 82A. As shown in FIG. 5A, the through hole 84 has a shape that widens toward the lower surface 8 d side, and is formed at a position corresponding to the receiving surface 95 f of the light conversion unit 95 included in the magnetic head slider 9. .
- the laser diode 7 has a rectangular plate shape and is accommodated in the recess 82A so as to be substantially parallel to the bottom of the recess 82A of the submount 8A.
- the laser diode 7 is arranged so that the front portion covers the through hole 84.
- the laser diode 7 has a pn junction surface 71 at the bottom, and the front-rear direction of the pn junction surface 71 is the resonator direction. For this reason, the resonator direction of the laser diode 7 is substantially parallel to the bottom of the recess 82A.
- a notch 721 extending obliquely from the lower surface to the rear side is formed at the front portion of the laser diode 7 covering the through hole 84.
- the laser light generated by the laser diode 7 is totally reflected by the inclined surface 722 constituting the notch 721 and is output downwardly perpendicular to the resonator direction. Therefore, the corner portion having the inclined surface 722 is the output end portion 72a of the laser beam.
- the laser light output downward from the output end portion 72 a passes through the through hole 84 and is incident on the receiving surface 95 f of the light converting portion 95.
- the laser diode 7 is not limited to this example.
- at least the lower part of the front end face of the laser diode 7 may be an inclined surface 722.
- the laser light output downward from the laser diode 7 accommodated in the recess 82A of the submount 8A passes through the through hole 84, and the receiving surface of the light conversion unit 95 included in the magnetic head slider 9
- the propagation distance of the laser light from the output end portion 72a of the laser diode 7 to the receiving surface 95f of the light converting portion 95 can be shortened. Coupling loss can be reduced.
- a plurality of wirings 81 extending from the vicinity of the through hole 84 to the front end face 8e facing slightly downward are formed at the front portion of the lower surface 8d of the submount 8A. Yes. As shown in FIGS. 2 and 3, these wirings 81 electrically connect a plurality of terminals 91 provided on the magnetic head slider 9 and a plurality of terminals 411 provided on the HGA 41. Specifically, the front end portion of each wiring 81 extends to the front end surface 8e of the submount 8A and is connected to each terminal 411 provided on the HGA 41 by soldering or the like. On the other hand, the rear end portion of each wiring 81 extends to a position corresponding to the front end surface 9e of the magnetic head slider 9, and is connected to each terminal 91 provided on the end surface 9e by solder or the like.
- each end of the wiring 81 is formed to have a predetermined angle smaller than 180 degrees with respect to the terminals 91 and 411 to be connected. Is easy.
- a pad-like wiring (first wiring) 85 extending to the bottom is formed in the recess 82A of the submount 8A.
- the wiring 85 is connected to a terminal 75 provided on the lower surface of the laser diode 7 accommodated in the recess 82A.
- An alignment mark 86 used when mounting the laser diode 7 is also formed on the bottom of the recess 82A.
- a wiring (second wiring) 83 extending from the through hole 84 to the front end face 8e is formed in the front portion of the lower surface 8d of the submount 8A.
- the wiring 83 extends from the through hole 84 to the outside in the width direction, then bends forward, reaches the end surface 8e, and is connected to a terminal 411 provided on the HGA 41 by solder or the like.
- the wiring 83 and the wiring 85 are connected via an in-hole wiring 841 formed on the side wall of the through hole 84 as shown in FIGS. 4B and 5A.
- the terminal 75 provided in the laser diode 7 is electrically connected to the terminal 411 provided in the HGA 41.
- the terminal 76 provided on the upper surface of the laser diode 7 is grounded to the flexure 413 through a joint 413g made of a conductive adhesive or the like.
- the lower surface 8d of the submount 8A is provided with a convex portion 88 made of the same metal material as the wirings 81 and 83 and having the same thickness.
- the convex portion 88 is formed so as to surround substantially the center of the region corresponding to the magnetic head slider 9.
- an adhesive is disposed on the inner side surrounded by the projection 88.
- the upper surface 9f of the magnetic head slider 9 is bonded to the lower surface 8d of the submount 8A in a state where a part thereof is in contact with the top surface of the convex portion 88.
- the convex portion 88 interposing the convex portion 88 between the lower surface 8d of the submount 8A and the upper surface 9f of the magnetic head slider 9, it is possible to suppress the deformation of the magnetic head slider 9 due to the thermal expansion of the submount 8A. Further, since the convex portion 88 is formed so as to surround substantially the center of the region corresponding to the magnetic head slider 9, it can be suppressed that the magnetic head slider 9 is adhered to the submount 8A in an inclined posture.
- FIG. 6A and 6B are perspective views illustrating the upper surface side and the lower surface side of the submount 8E according to the modification.
- FIG. 7 is an enlarged cross-sectional view according to this modification. In FIG. 7, the outline of the principal part of the cross section when cut in the width direction through the through-hole 43 is shown.
- two pad-like wirings (first wirings) 85a and 85b extending in the front-rear direction and arranged in the width direction are formed at the bottom of the recess 82A of the submount 8E.
- these wirings 85a and 85b are connected to two terminals 75a and 75b provided on the lower surface of the laser diode 7 accommodated in the recess 82A, respectively.
- two wires (second wires) 83a and 83b extending from the through hole 84 to the front end surface 8e are formed in the front portion of the lower surface 8d of the submount 8E.
- These wirings 83a and 83b extend outward from both sides in the width direction of the through hole 84, then bend forward and reach the end face 8e, and are connected to terminals 411 provided on the HGA 41 by soldering or the like.
- These wirings 83a and 83b and wirings 85a and 85b are connected to each other through in-hole wirings 841a and 841b formed on both sides in the width direction of the side wall of the through hole 84, as shown in FIG. .
- the terminals 75 a and 75 b provided on the lower surface of the laser diode 7 are electrically connected to the terminal 411 provided on the HGA 41.
- FIG. 8 is an enlarged cross-sectional view according to another modification.
- the through-hole 84 of the submount 8A may be filled with a waveguide member 848 that is transparent to laser light emitted from the laser diode 7, such as quartz. According to this, the coupling loss of laser light can be further reduced.
- FIG. 9 is an enlarged cross-sectional view according to another modified example.
- a lens 849 for condensing the laser light emitted from the laser diode 7 toward the receiving surface 95f of the light conversion unit 95 may be provided in the through hole 84 of the submount 8A. According to this, the coupling loss of laser light can be further reduced.
- FIG. 10 and 11 are a perspective view and a cross-sectional view of the heat-assisted magnetic recording head 10B.
- FIG. 11 shows an outline of a cross section when the heat-assisted magnetic recording head 10B is cut at the center in the width direction.
- FIG. 12 is a perspective view showing the lower surface side of the submount 8B included in the heat-assisted magnetic recording head 10B.
- FIG. 13 is an enlarged view of a main part of FIG.
- FIG. 14 is a cross-sectional view of the heat-assisted magnetic recording head 10B.
- FIG. 14 shows an outline of the main part of the cross section when the heat-assisted magnetic recording head 10B is cut along the width direction.
- the submount 8B is formed with a recess 82B that opens to the lower surface 8d side for accommodating the laser diode 7.
- the laser diode 7 is housed in the recess 82B of the submount 8B so as to be substantially parallel to the bottom of the recess 82B.
- This laser diode 7 has an output end portion 72a that outputs laser light toward the lower side perpendicular to the resonator direction at the front portion covering the receiving surface 95f of the light converting portion 95 included in the magnetic head slider 9. ing.
- the laser beam output downward from the output end portion 72 a is incident on the receiving surface 95 f of the light conversion unit 95.
- the laser light output downward from the laser diode 7 accommodated in the recess 82B of the submount 8B is incident on the receiving surface 95f of the light conversion unit 95 included in the magnetic head slider 9.
- two pad-like wirings (first wirings) 85a and 85b extending in the front-rear direction and arranged in the width direction are formed at the bottom of the recess 82B of the submount 8B. ing. As shown in FIG. 14, these wirings 85a and 85b are respectively connected to two terminals 75a and 75b provided on the upper surface of the laser diode 7 accommodated in the recess 82B.
- two wirings (second wirings) 83a and 83b extending from the recess 82B to the front end surface 8e are formed in the front portion of the lower surface 8d of the submount 8B.
- These wirings 83a and 83b extend outward from both sides in the width direction of the recess 82B, then bend forward and reach the end face 8e, and are connected to terminals 411 provided on the HGA 41 by soldering or the like.
- These wirings 83a and 83b and wirings 85a and 85b are connected to each other through side wall wirings 87a and 87b formed on the side of the recess 82A, as shown in FIGS. Thereby, the terminals 75 a and 75 b provided on the upper surface of the laser diode 7 are electrically connected to the terminal 411 provided on the HGA 41.
- the wirings 83a and 83b electrically connected to the terminals 75a and 75b provided on the laser diode 7 are formed on the lower surface 8d of the submount 8E. Similarly to the wiring 81, the terminal 411 provided in the HGA 41 can be connected.
- thermally-assisted magnetic recording head 10C a third example of the thermally-assisted magnetic recording head 10 according to an embodiment of the present invention.
- FIG. 15 and 16 are a perspective view and a cross-sectional view of the heat-assisted magnetic recording head 10C.
- FIG. 16 shows an outline of a cross section when the heat-assisted magnetic recording head 10C is cut at the center in the width direction.
- FIG. 17 is a perspective view showing the lower surface side of the submount 8C included in the heat-assisted magnetic recording head 10C.
- 18 is an enlarged view of the main part of FIG.
- a base portion 891 for mounting the magnetic head slider 9 is provided on the lower surface 8d of the submount 8C so as to protrude downward from the lower surface 8d.
- the base portion 891 is made of a waveguide member that is transparent to the laser light emitted from the laser diode 7 such as quartz.
- a mirror 892 facing the rear side and the lower side is formed on the front side of the base portion 891. As shown in FIG. 18, the mirror 892 is formed to cover the receiving surface 95 f of the light conversion unit 95 included in the magnetic head slider 9.
- the magnetic head slider 9 is attached to the base portion 891 so as to form a gap between the receiving surface 95f of the light converting portion 95 and the lower surface 8d of the submount 8C, and the mirror 892 It is formed between the receiving surface 95f of the portion 95 and the lower surface 8d of the submount 8C.
- the laser diode 7 is attached to the rear side of the base portion 891 in the lower surface 8d of the submount 8C, and is arranged side by side with the magnetic head slider 9 in the front-rear direction. As shown in FIG. 18, the laser diode 7 has a pn junction surface 71 on the side close to the lower surface 8d of the submount 8C, and the front-rear direction of the pn junction surface 71 is the resonator direction. Further, the front end face 78 of the laser diode 7 is a cleavage plane, and the laser light is output from the end face 78 toward the front side.
- the output laser light is incident on the rear end surface 891g of the base portion 891, passes through the base portion 891, is emitted from the front end surface 891e of the base portion 891, and reaches the mirror 892. Then, the laser beam is turned downward by the mirror 892 and is incident on the receiving surface 95 f of the light conversion unit 95 included in the magnetic head slider 9.
- the laser diode 7 is arranged above the magnetic head slider 9 as in the first and second examples described above.
- the vertical thickness of the submount 8C can be reduced.
- the recording unit magnetic recording element 93 or near-field optical element provided at the lower end
- two pad-like wirings 893a and 893b arranged in the front-rear direction are formed on the rear side of the base portion 891 in the lower surface 8d of the submount 8C. These wirings 893a and 893b are connected to two terminals (not shown) provided on the upper surface of the laser diode 7, respectively.
- two wirings 83a and 83b extending from these wirings 893a and 893b to the front end face 8e are formed on the lower surface 8d of the submount 8C.
- These wirings 83a and 83b extend from the wirings 893a and 893b to the outside in the width direction, then bend forward and reach the end face 8e, and are connected to terminals 411 provided on the HGA 41 by soldering or the like. Thereby, two terminals (not shown) provided on the upper surface of the laser diode 7 are electrically connected to the terminal 411 provided on the HGA 41.
- the wirings 83a and 83b electrically connected to the two terminals (not shown) provided on the laser diode 7 are formed on the lower surface 8d of the submount 8E, so that these wirings 85a and 85b. Can be connected to a terminal 411 provided in the HGA 41 in the same manner as the wiring 81 described above.
- the laser diode 7 is mounted on the submounts 8A to 8C, and the heat generated in the laser diode 7 is sublimated. Since they can be dispersed by the mounts 8A to 8C, deformation of the magnetic head slider 9 can be suppressed. Further, since the thermal expansion of the laser diode 7 can be absorbed by the submounts 8A to 8C, deformation of the magnetic head slider 9 can be suppressed.
- the characteristics of the laser diode 7 can be evaluated at the stage where the laser diode 7 is mounted on the submounts 8A to 8C in the manufacturing process. Therefore, the characteristic evaluation of the submounts 8A to 8C on which the laser diode 7 is mounted and the characteristic evaluation of the magnetic head slider 9 can be performed separately. As a result, the thermally assisted magnetic recording head in which these are assembled A decrease in yield as a whole of 10A to 10C can be suppressed.
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Recording Or Reproducing By Magnetic Means (AREA)
- Magnetic Heads (AREA)
- Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
- Supporting Of Heads In Record-Carrier Devices (AREA)
Abstract
Description
本発明の他の目的、特徴及び利点は添付図面に関する以下の本発明の実施例の記載から明らかになるであろう。
以下、本発明の一実施形態に係る熱アシスト磁気記録ヘッド10の第1例(熱アシスト磁気記録ヘッド10Aとする)について説明する。
以下、本発明の一実施形態に係る熱アシスト磁気記録ヘッド10の第2例(熱アシスト磁気記録ヘッド10Bとする)について説明する。なお、上記第1例と重複する構成については、図中に同番号を付すことで詳細な説明を省略する。
以下、本発明の一実施形態に係る熱アシスト磁気記録ヘッド10の第3例(熱アシスト磁気記録ヘッド10Cとする)について説明する。なお、上記第1例と重複する構成については、図中に同番号を付すことで詳細な説明を省略する。
2 筐体
3 磁気ディスク(記録媒体の一例)
4 ヘッドアッセンブリ
41 HGA
411 端子
412 ロードビーム
413 フレクシャ
415 ディンプル
5 スピンドルモータ
6 ボイスコイルモータ
7 レーザーダイオード(発光素子の一例)
71 pn接合面
72a 出力端部
721 切り欠き
722 傾斜面
75 端子
76 端子
8A~8C,8E サブマウント
81 配線
82A,82B 凹部
83 配線(第2の配線)
84 貫通孔
841 孔内配線
848 導波路部材
849 レンズ
85 配線(第1の配線)
86 アライメントマーク
87 側壁配線
88 凸部
891 台部
892 ミラー
893 配線
9 磁気ヘッドスライダ
9d 媒体対向面
91 端子
93 磁気記録素子
95 光変換部
95d 端面
95f 受け入れ面
951 導波路部
952 近接場光学素子
10(10A~10C) 熱アシスト磁気記録ヘッド
Claims (16)
- 発光素子と、
前記発光素子が実装され、ヘッド支持部材に取り付けられるサブマウントと、
少なくとも磁気記録素子を含み、前記サブマウントに取り付けられるへッドスライダであって、前記発光素子から発せられた光を受け入れ、記録媒体と対向する媒体対向面から近接場光を発する光変換部を含むヘッドスライダと、
を備え、
前記サブマウントは、前記ヘッドスライダに設けられた端子と、前記ヘッド支持部材に設けられた端子とを電気的に接続する配線を有する、
熱アシスト磁気記録ヘッド。 - 前記サブマウントは、前記発光素子に設けられた端子と、前記ヘッド支持部材に設けられた端子とを電気的に接続する配線を有する、
請求項1に記載の熱アシスト磁気記録ヘッド。 - 前記サブマウントには、前記ヘッド支持部材側に開口し、前記発光素子が収容される凹部と、前記凹部の底部から前記ヘッドスライダ側まで貫通する貫通孔と、が形成され、
前記凹部内に収容された前記発光素子から発せられた光は、前記貫通孔を通過し、前記ヘッドスライダの前記サブマウント側の面に形成された、前記光変換部の受け入れ面に入射される、
請求項1に記載の熱アシスト磁気記録ヘッド。 - 前記発光素子は、共振器方向と交差する方向に光を発する出力端部が形成されたレーザーダイオードであり、前記共振器方向が前記凹部の底部と略平行となるように前記凹部内に収容され、前記貫通孔に向けて前記出力端部から光を発する、
請求項3に記載の熱アシスト磁気記録ヘッド。 - 前記凹部の底部には、前記発光素子に設けられた端子と接続される第1の配線が形成され、
前記サブマウントの前記ヘッドスライダ側の面には、前記ヘッド支持部材に設けられた端子と接続される第2の配線が形成され、
前記貫通孔の側壁には、一端が前記第1の配線に接続され、他端が前記第2の配線に接続される孔内配線が形成される、
請求項3に記載の熱アシスト磁気記録ヘッド。 - 前記発光素子の一方の主面に設けられた端子は、前記凹部の底部に形成された前記第1の配線と接続され、前記発光素子の他方の主面に設けられた端子は、前記ヘッド支持部材に接地される、
請求項5に記載の熱アシスト磁気記録ヘッド。 - 前記凹部の底部には、前記発光素子の一方の主面に設けられた複数の端子とそれぞれ接続される複数の第1の配線が形成され、
前記サブマウントの前記ヘッドスライダ側の面には、前記ヘッド支持部材に設けられた複数の端子とそれぞれ接続される複数の第2の配線が形成され、
前記貫通孔の側壁には、一端が前記複数の第1の配線にそれぞれ接続され、他端が前記複数の第2の配線にそれぞれ接続される複数の孔内配線が形成される、
請求項3に記載の熱アシスト磁気記録ヘッド。 - 前記貫通孔内には、前記発光素子から発せられる光に対して透光性を有する導波路部材が充填される、
請求項3に記載の熱アシスト磁気記録ヘッド。 - 前記貫通孔内には、前記発光素子から発せられる光を、前記光変換部の受け入れ面に向けて集光するレンズが設けられる、
請求項3に記載の熱アシスト磁気記録ヘッド。 - 前記サブマウントには、前記ヘッドスライダ側に開口し、前記発光素子が収容される凹部が形成され、
前記凹部内に収容された前記発光素子から発せられた光は、前記ヘッドスライダの前記サブマウント側の面に形成された、前記光変換部の受け入れ面に入射される、
請求項1に記載の熱アシスト磁気記録ヘッド。 - 前記発光素子は、共振器方向と交差する方向に光を発する出力端部が形成されたレーザーダイオードであり、前記共振器方向が前記凹部の底部と略平行となるように前記凹部内に収容され、前記光変換部の受け入れ面に向けて前記出力端部から光を発する、
請求項10に記載の熱アシスト磁気記録ヘッド。 - 前記凹部の底部には、前記発光素子の一方の主面に設けられた複数の端子とそれぞれ接続される複数の第1の配線が形成され、
前記サブマウントの前記ヘッドスライダ側の面には、前記ヘッド支持部材に設けられた複数の端子とそれぞれ接続される複数の第2の配線が形成され、
前記凹部の側部には、一端が前記複数の第1の配線にそれぞれ接続され、他端が前記複数の第2の配線にそれぞれ接続される複数の側壁配線が形成される、
請求項10に記載の熱アシスト磁気記録ヘッド。 - 前記サブマウントの前記ヘッドスライダと対向する対向面には、前記ヘッドスライダとの間に介在する台部と、ミラーとが形成され、
前記発光素子は、前記ミラーに向けて光を発するよう前記対向面に実装され、
前記発光素子から発せられた光は、前記ミラーにより向きを変え、前記ヘッドスライダの前記サブマウント側の面に形成された、前記光変換部の受け入れ面に入射される、
請求項1に記載の熱アシスト磁気記録ヘッド。 - 前記台部は、前記発光素子から発せられる光に対して透光性を有する導波路部材で構成され、
前記発光素子から発せられた光は、前記台部内を通過した後、前記ミラーにより向きを変え、前記光変換部の受け入れ面に入射される、
請求項13に記載の熱アシスト磁気記録ヘッド。 - 前記サブマウントの前記ヘッドスライダが取り付けられる取付面には凸部が形成され、
前記ヘッドスライダは、前記凸部の頂面に一部が当接した状態で、前記取付面に接着される、
請求項1に記載の熱アシスト磁気記録ヘッド。 - 請求項1に記載の熱アシスト磁気記録ヘッドを備えるヘッドアッセンブリ。
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US12/995,253 US8270262B2 (en) | 2008-06-02 | 2009-06-01 | Thermally assisted magnetic recording head and head assembly |
JP2010515857A JP5096574B2 (ja) | 2008-06-02 | 2009-06-01 | 熱アシスト磁気記録ヘッド及びヘッドアッセンブリ |
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US20110149698A1 (en) | 2011-06-23 |
JP5096574B2 (ja) | 2012-12-12 |
US8270262B2 (en) | 2012-09-18 |
JPWO2009148012A1 (ja) | 2011-10-27 |
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