JP2004047077A - Recording/reproducing head support mechanism and recording/reproducing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent electrostatic destruction of an electromagnetic conversion element or an optical module without inhibiting the displacement performance of an actuator in a recording/reproducing head support mechanism of a magnetic disk drive and an optical disk drive having the actuator for small displacement. <P>SOLUTION: This recording/reproducing head support mechanism has a slider 2 provided with the electromagnetic conversion element or the optical module and a suspension 3. The slider 2 is supported by the suspension 3 through the actuator 4 for displacing the slider and has a wiring pattern including a ground wiring 90 electrically connected to the slider 2. The wiring pattern includes an adhesion wiring 5A adhered to the suspension 3 and a floating wiring 5B extending up to the slider 2 away from the suspension 3 and being movable and/or deformable in the displacement direction of the slider 2 by the actuator 4. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a recording / reproducing head support mechanism in a recording / reproducing apparatus such as a hard disk drive (hereinafter abbreviated as HDD) or an optical disk drive, and a recording / reproducing apparatus having the recording / reproducing head supporting mechanism.
[0002]
[Prior art]
A conventional magnetic head support mechanism used for an HDD generally supports a slider provided with an electromagnetic transducer by a suspension and has a wiring pattern connected to the electromagnetic transducer.
[0003]
The electromagnetic conversion element has a magnetic pole and a coil for mutually converting an electric signal and a magnetic signal, and, in addition to these, a magnetoresistive element for converting a magnetic signal into a voltage signal, and the like. It is formed by a thin film forming technique, an assembly processing technique, or the like. The slider is Al ₂ O ₃ -TiC and CaTiO ₃ It is composed of a magnetic material such as non-magnetic ceramics or ferrite, and its shape is almost a rectangular parallelepiped. The surface (air bearing surface) facing the disk medium floats at a very small distance from the disk medium. It is processed into a shape suitable for generating pressure. The suspension supporting the slider is formed by subjecting an elastic stainless steel plate or the like to processing such as bending or punching.
[0004]
The slider may generate static electricity during actual use. This static electricity is caused by the sliding between the slider flying surface and the disk medium surface at the contact start / stop (CSS), and the flying height of the slider being extremely small with respect to the disk medium surface rotating at high speed. This occurs due to contact between the slider and the disk medium surface, friction between the slider and air, and the like.
[0005]
When static electricity is generated in the slider, an electrostatic breakdown phenomenon may occur in the electromagnetic transducer. To prevent this, in many magnetic heads, the slider is grounded (for example, JP-A-2-61810, JP-A-2-244419, and JP-A-8-111015). Japanese Patent Application Laid-Open No. 2-61810 discloses a thin-film magnetic head in which a conductor electrically connected to a magnetic core provided on a slider is bonded to a gimbal portion of a suspension at a ground potential with a conductive adhesive. . Japanese Patent Laid-Open No. 2-244419 discloses that a slider side surface and a suspension are bonded with a conductive adhesive. Japanese Patent Application Laid-Open No. HEI 8-111015 describes a magnetic head device in which a ground electrode is provided on a flexible wiring board provided on a suspension, and the ground electrode is electrically connected to a slider.
[0006]
By the way, in the HDD, as the miniaturization and the recording density increase, the track density becomes higher and the track width becomes narrower. In order to improve the tracking accuracy in a high-density recording HDD, it is effective to provide an actuator for minutely displacing an electromagnetic transducer or a slider with respect to a suspension in a magnetic head. Such an actuator is described in, for example, JP-A-6-259905, JP-A-6-309822, and JP-A-8-180623.
[0007]
[Problems to be solved by the invention]
In a magnetic head having an actuator, when the slider is driven by the actuator, the slider is displaced relative to the suspension. Therefore, the electric wiring connecting the suspension side and the slider side may hinder this displacement.
[0008]
However, there is no description about the grounding of the slider in each of the above publications in which an actuator is provided. Therefore, there is no description of a means for grounding the slider without interfering with the displacement performance of the actuator when the actuator is interposed.
[0009]
An object of the present invention is to prevent electrostatic breakdown of an electromagnetic conversion element or an optical module without impairing the displacement performance of an actuator in a recording / reproducing head support mechanism of a magnetic disk device or an optical disk device having an actuator for minute displacement. It is.
[0010]
[Means for Solving the Problems]
Such an object is achieved by the following configurations.
(1) It has a slider provided with an electromagnetic transducer or an optical module, and a suspension, and the slider is supported by the suspension via an actuator for displacing the slider.
It has a wiring pattern including a wiring electrically connected to the electromagnetic transducer or the optical module, and a ground wiring electrically connected to the slider. A recording / reproducing head support mechanism including a floating wiring extending to the slider and movable and / or deformable in the direction of displacement of the slider by the actuator.
(2) a slider provided with an electromagnetic transducer or an optical module, and a suspension, wherein the slider is supported by the suspension via an actuator for displacing the slider;
The tip of the suspension bends or bends toward the slider, and the tip has a flexible region movable and / or deformable in the direction of displacement of the slider by the actuator;
A wiring pattern is in close contact with the surface of the flexible region, and the wiring pattern includes a wiring that electrically connects to the electromagnetic transducer or the optical module and a ground wiring that electrically connects to the slider. Reproduction head support mechanism.
(3) The recording / reproducing head support mechanism according to the above (1) or (2), wherein the suspension is made of a conductive material, and the ground wiring is drawn out from the wiring pattern and is electrically connected to the suspension.
(4) A recording / reproducing apparatus having the recording / reproducing head support mechanism according to any one of (1) to (3).
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
The recording / reproducing head support mechanism of the present invention has a slider provided with an electromagnetic transducer or an optical module, and a suspension, and the slider is supported by the suspension via an actuator for displacing the slider. . Hereinafter, an example in which the present invention is applied to a magnetic head in which an electromagnetic transducer is provided on a slider will be described.
[0012]
First, representative configurations of the suspension, the actuator, and the slider will be described.
[0013]
FIG. 11 is an exploded perspective view showing a configuration example of a magnetic head support mechanism having an actuator. This magnetic head support mechanism has a slider 2 provided with an electromagnetic transducer 1 and a suspension 3 supporting the slider 2, and an actuator 4 is provided between the slider 2 and the suspension 3.
[0014]
The actuator 4 is for slightly displacing the slider 2 with respect to the suspension 3, and is fixed to a gimbal portion 3a provided at the end of the suspension 3 by bonding or the like. The gimbal portion 3a is formed by providing a groove by etching or punching for the purpose of causing the slider to follow the surface of the disk medium. The magnetic head is also provided with a main actuator (VCM or the like) for driving the entire suspension.
[0015]
The actuator 4 has a fixed part 43 and a movable part 44, and further has two rod-shaped displacement generating parts 41, 41 connecting these parts. The displacement generating section 41 is provided with at least one piezoelectric / electrostrictive material layer having an electrode layer on both sides, and is configured to generate expansion and contraction by applying a voltage to the electrode layer. The piezoelectric / electrostrictive material layer is made of a piezoelectric / electrostrictive material that expands and contracts by an inverse piezoelectric effect or an electrostrictive effect. One end of the displacement generating section 41 is connected to the suspension via the fixed section 43, and the other end of the displacement generating section 41 is connected to the slider via the movable section 44. The electromagnetic transducer is displaced in an arc shape so as to intersect the recording track of the disk medium.
[0016]
In the actuator 4, in the displacement generating section 41, when the piezoelectric / electrostrictive material layer is made of a so-called piezoelectric material such as PZT, the piezoelectric / electrostrictive material layer is usually subjected to a polarization treatment for improving the displacement performance. It has been subjected. The polarization direction by this polarization processing is the thickness direction of the actuator. When the direction of the electric field when a voltage is applied to the electrode layer matches the direction of polarization, the piezoelectric / electrostrictive material layer between the two electrodes extends in the thickness direction (piezoelectric longitudinal effect), and in the in-plane direction, Shrink (piezoelectric lateral effect). On the other hand, when the direction of the electric field is opposite to the direction of polarization, the piezoelectric / electrostrictive material layer contracts in its thickness direction (piezoelectric longitudinal effect) and elongates in its in-plane direction (piezoelectric transverse effect). When a voltage that causes contraction is alternately applied to one of the displacement generators and the other, the ratio between the length of one displacement generator and the length of the other displacement generator changes. As a result, the two displacement generating portions bend in the same direction in the plane of the actuator. Due to this bending, the movable portion 44 swings relative to the fixed portion 43 in a direction indicated by an arrow in FIG. This swing is a displacement in which the movable section 44 draws an arc-shaped trajectory in a direction substantially perpendicular to the direction of expansion and contraction of the displacement generating section 41, and the swing direction exists in the plane of the actuator. Therefore, the electromagnetic transducer also swings along an arc-shaped trajectory. At this time, since the direction of the voltage is the same as that of the polarization, there is no fear of the polarization decay, which is preferable. Note that even if the voltage applied alternately to both the displacement generators causes the displacement generators to extend, similar swinging occurs.
[0017]
In the illustrated actuator, voltages that cause opposite displacement may be simultaneously applied to both displacement generating units. That is, an alternating voltage may be simultaneously applied to one displacement generating unit and the other displacement generating unit such that when one expands, the other contracts, and when one contracts, the other expands. The swing of the movable portion 44 at this time is centered on the position when no voltage is applied. In this case, the amplitude of the swing when the driving voltage is the same is about twice as large as the above case where the voltage is applied alternately. However, in this case, the displacement generating portion is extended on one side of the swing, and the driving voltage at this time is opposite to the direction of the polarization. Therefore, when the applied voltage is high or when the voltage is continuously applied, the polarization of the piezoelectric / electrostrictive material may be attenuated. Therefore, by applying a constant DC bias voltage in the same direction as the polarization and superimposing the alternating voltage on the bias voltage as the drive voltage, the direction of the drive voltage may be opposite to the direction of the polarization. Not to be. In this case, the swing is centered on the position when only the bias voltage is applied.
[0018]
The illustrated actuator forms the displacement generating section 41, the fixed section 43, and the movable section 44 integrally by forming a hole and a notch in a plate-shaped body of a piezoelectric / electrostrictive material provided with an electrode layer at a predetermined position. It has a formed structure. Therefore, the rigidity and dimensional accuracy of the actuator can be increased, and there is no fear that an assembly error occurs. Further, since no adhesive is used for manufacturing the actuator, no adhesive layer is present in a portion where stress is generated by deformation of the displacement generating portion. Therefore, problems such as transmission loss due to the adhesive layer and aging of the adhesive strength do not occur.
[0019]
In this specification, a piezoelectric / electrostrictive material means a material that expands and contracts due to an inverse piezoelectric effect or an electrostrictive effect. The piezoelectric / electrostrictive material may be any material as long as it can be applied to the displacement generating portion of the actuator as described above. However, because of its high rigidity, PZT [Pb (Zr, Ti) O ₃ ], PT (PbTiO ₃ ), PLZT [(Pb, La) (Zr, Ti) O ₃ ], Barium titanate (BaTiO ₃ ) Are preferred. When the actuator is made of a ceramic piezoelectric / electrostrictive material, it can be easily manufactured using a thick film method such as a sheet method or a printing method. Note that the actuator can also be manufactured by a thin film method. When the piezoelectric / electrostrictive material has a crystal structure, it may be a polycrystal or a single crystal.
[0020]
The method for forming the electrode layer is not particularly limited, and may be appropriately selected from various methods such as printing, baking, sputtering, and vapor deposition of a conductive paste in consideration of the method for forming the piezoelectric / electrostrictive material layer.
[0021]
The actuator may have a configuration in which at least one piezoelectric / electrostrictive material layer sandwiched between electrode layers on both sides is present in the displacement generating section, and preferably, two such piezoelectric / electrostrictive material layers are provided. It is preferable to be a laminated type laminated as described above. The amount of expansion and contraction of the piezoelectric / electrostrictive material layer is proportional to the electric field strength. However, if the above-mentioned laminated type is used, the piezoelectric / electrostrictive material layer becomes thin, so that the required electric field strength can be obtained at a low voltage, and the Voltage can be reduced. If the same driving voltage is used as in the case of the single-layer structure, a larger amount of expansion and contraction can be obtained. The thickness of the piezoelectric / electrostrictive material layer is not particularly limited, and may be appropriately determined according to various conditions such as a driving voltage, a required amount of expansion and contraction, and ease of manufacturing, but is usually about 5 to 50 μm. It is preferable that There is no particular upper limit on the number of stacked piezoelectric / electrostrictive material layers, and the upper limit may be appropriately determined so that a displacement generating portion having a desired thickness is obtained. Note that a piezoelectric / electrostrictive material layer as a cover portion is usually provided further outside the outermost electrode layer.
[0022]
The slider 2 is made of a ceramic having a relatively low electric resistance, for example, Al. ₂ O ₃ -Composed of TiC or Mn-Zn ferrite. A magnetic core, a coil, and the like are provided on one side surface of the slider 2 with an insulating layer interposed therebetween, thereby forming the electromagnetic transducer 1.
[0023]
Although not shown, a wiring pattern for driving the actuator 4 and a wiring pattern connected to the electromagnetic transducer 1 are formed on the surface of the suspension 3 as necessary. Further, an IC chip (read / write IC) for head drive may be mounted on the surface of the suspension 3. If the signal processing IC is provided on the suspension, the length of the wiring pattern from the electromagnetic transducer to the signal processing IC can be reduced, so that the inductive component is reduced and the resonance frequency can be increased.
[0024]
The present invention is suitable for the case of using an integrated actuator having the structure shown in FIG. 11, but may be any of various actuators having an assembly structure using a piezoelectric element, an actuator using an electrostatic force, an actuator using an electromagnetic force, and the like. It can also be applied when using.
[0025]
The suspension 3 is generally made of an elastic metal material such as stainless steel, but may be made of an insulating material such as a resin. On the other hand, it is general that the wiring pattern has a structure in which a part of the wiring pattern is covered with a resin coating, and the wiring is closely attached to the suspension surface. The method of forming the wiring pattern having such a structure is not particularly limited. For example, a resin film is formed as an insulating film on the surface of the suspension 3, a conductor line is formed thereon, and a resin film is formed as a protective film. Or a method of bonding a wiring film (flexible wiring board) formed of a laminate of such a resin film and a conductor wire to the suspension 3.
[0026]
According to the present invention, in the magnetic head supporting mechanism having the above-described configuration, the slider is grounded to prevent the electromagnetic transducer from being electrostatically damaged. Hereinafter, the grounding of the slider according to the present invention and the reference example will be specifically described.
[0027]
In the first mode (reference example), the slider is electrically connected to the ground region of the suspension by an electrical connection member movable and / or deformable in the direction of displacement of the slider by the actuator.
[0028]
FIG. 1 shows a configuration example of the first embodiment. FIG. 1 is a side view showing a state where the slider 2 is attached to the suspension 3 via the actuator 4. The adhesive 7a is used for bonding between the fixed part 43 of the actuator 4 and the suspension 3 and bonding between the movable part 44 of the actuator 4 and the slider 2. The suspension 3 is made of a conductive material such as a metal and is kept at a ground potential. Therefore, the suspension 3 itself is the above-mentioned ground region here. The slider 2 and the suspension 3 are electrically connected by a highly flexible lead 8, and static electricity generated in the slider 2 flows to the suspension 3 via the lead 8. The electrical connection of the lead wire 8 to the slider 2 and the suspension 3 is made by a conductive adhesive 7b.
[0029]
FIG. 2 shows another configuration example of the first embodiment. FIG. 2 is a plan view showing a state where the slider 2 is attached to the suspension 3 via the actuator 4 as viewed from the disk medium facing surface side of the suspension 3. In FIG. 2, a grounding wire 90 is formed on the surface of the suspension 3, and one end of the wire 90 is connected to a grounding electrode 91 which is the grounding region. The other end of the ground wiring 90 is connected to a conductor having a ground potential (such as a housing of an HDD). Since the ground electrode 91 and the slider 2 are electrically connected by the highly flexible lead wire 8, the slider 2 is grounded. The electrical connection of the lead wire 8 to the slider 2 and the ground electrode 91 is made by a conductive adhesive 7b. Reference numeral 52 in the figure denotes an actuator driving wiring including two signal wirings and one ground wiring, and is provided in close contact with the surface of the suspension 3. Reference numeral 51 in the figure denotes a signal wiring for electrically connecting the electromagnetic transducers. The signal wire 51 extends around the front end of the suspension 3 from the back side of the suspension 3 in the figure, and is provided on the slider 2. Connect to terminal electrode group.
[0030]
In FIGS. 1 and 2, the grounding of the slider 2 does not hinder the displacement of the actuator 4 because the lead wire 8 having high flexibility is used. Further, the connection point of the lead wire 8 to the slider 2 can be selected relatively freely. The configuration shown in FIG. 2 allows the slider 2 to be grounded even when the suspension 3 is made of an insulating material.
[0031]
FIG. 3 shows another configuration example of the first mode. In FIG. 1, the actuator 4 is arranged on the rear side of the slider 2, that is, on the surface of the slider 2 on the suspension 3 side. In FIG. 3, the actuator 4 is arranged on the side surface of the slider 2 in order to suppress the entire height. 4 are arranged. Other configurations in FIG. 3 are the same as those in FIG. It should be noted that the positional relationship between the slider and the actuator may be any of FIGS. 1 and 3 in all aspects included in the present invention, not limited to the first aspect.
[0032]
In the second aspect (reference example), a conductive region is formed in at least a part of the actuator, and the ground region of the suspension and the slider are electrically connected through the conductive region.
[0033]
FIG. 4 shows a configuration example of the second mode. FIG. 4 is a side view showing a state where the slider 2 is attached to the suspension 3 via the actuator 4. The suspension 3 is made of a conductive material such as a metal and is kept at a ground potential. On the surface of the actuator 4, a grounding conductor 9 is formed as the conductive region so as to connect the fixed part 43 and the movable part 44. In addition, a conductive adhesive 7b is used for bonding the fixed part 43 of the actuator 4 to the suspension 3 and bonding the movable part 44 of the actuator 4 to the slider 2, and these adhesives 7b are connected to the ground. One end and the other end of the conductor for use 9 are respectively covered. Therefore, the slider 2 is grounded.
[0034]
Note that, depending on the type of the actuator, the entirety or the vicinity of the surface of the actuator can be made of a conductive material. In this case, the slider can be grounded by using the whole or near the surface of the actuator as the conductive region.
[0035]
FIG. 5 shows another configuration example of the second embodiment. The actuator 4 shown in FIG. 5 is the above-described laminated piezoelectric actuator. As described above, the laminated piezoelectric actuator has a structure in which each piezoelectric / electrostrictive material layer is sandwiched between a pair of electrode layers. In FIG. 5, a ground electrode (ground conductor 9 in the figure) which is one of the pair of electrode layers is used as the conductive region for grounding the slider 2. Specifically, both ends of the grounding conductor 9 are exposed on the side surface of the actuator 4, and one end is electrically connected to the suspension 3 and the other end is electrically connected to the slider 2 by a conductive adhesive 7 b, respectively. Is grounded. Other configurations are the same as those in FIG.
[0036]
4 and 5, in bonding the actuator 4 to the suspension 3 and the slider 2, respectively, a conductive adhesive is used instead of a normal adhesive, and the grounding conductor 9 is not formed or formed when the actuator 4 is manufactured. The slider 2 can be grounded only by exposing it. Therefore, the grounding of the slider 2 does not hinder the displacement performance of the actuator 4 at all. In addition, an increase in the number of steps required to ground the slider 2 can be reduced.
[0037]
In FIGS. 4 and 5, only the conductive adhesive is used, but the conductive adhesive is generally obtained by dispersing a conductive material such as silver foil or carbon powder in an adhesive resin. However, the adhesiveness may be inferior to that of a normal adhesive. Therefore, a normal adhesive may be used in combination as needed.
[0038]
FIG. 6 shows another configuration example of the second mode. In FIG. 6, a wiring pattern formed of a flexible wiring board including signal wiring electrically connected to the electromagnetic transducer of the slider 2 is provided. This wiring pattern is composed of a contact wiring 5A that is in close contact with the surface of the suspension 3 and a floating wiring 5B that extends from the suspension 3 to the slider 2. The actuator drive wiring is not shown.
[0039]
The wiring pattern including the contact wiring 5A and the floating wiring 5B is formed by first forming a contact wiring made of a flexible wiring substrate on the medium facing surface of the suspension 3, and then removing the tip of the suspension 3 to form a part of the contact wiring. In a floating state. In the illustrated example, a terminal electrode group for making an electrical connection with the electromagnetic transducer is formed in advance on the distal end of the flexible wiring board, and the suspension 3 is formed so that the vicinity of the terminal electrode group is left as the terminal electrode plate 32. Part of the tip is removed. Then, the floating wiring 5B is bent or bent toward the slider 2 to bond one surface of the terminal electrode plate 32 to the slider 2 and the other surface to the actuator 4, and to connect the terminal electrode group to the terminal electrode of the slider 2. Connected to a group. Partial removal of the suspension 3 can be performed by, for example, punching or wet etching.
[0040]
FIG. 6 is similar to FIG. 5 in that the grounding conductor 9 of the actuator 4 is used as the conductive region for grounding the slider 2. However, in FIG. 6, on the movable portion 44 side of the actuator 4, the grounding conductor 9 and one surface of the terminal electrode plate 32 are connected by the conductive adhesive 7 b, and further, the other surface of the terminal electrode plate 32 is connected to the other surface. The slider 2 is connected to the slider 2 by a conductive adhesive 7b. Since the terminal electrode plate 32 is made of the same conductive material as the suspension 3, the slider 2 and the suspension 3 can be electrically connected.
[0041]
In FIGS. 5 and 6, the slider 2 is grounded by connecting the conductive suspension 3 and the grounding conductor 9 with the conductive adhesive 7b. And a ground wire may be connected to the suspension 3. Specifically, for example, as shown in FIG. 2, an actuator driving wiring 52 including a ground wiring may be used. In this case, the ground wiring may be connected to the conductive suspension 3 or may be connected to a conductor at the ground potential (such as an HDD housing). In the former case, similarly to the ground wiring 90 in FIG. 10, the ground wiring may be drawn out of the wiring pattern and connected to the suspension 3. In the latter case, the suspension 3 does not need to be a conductor. By using the ground wiring in this way, it is possible to minimize a change in the manufacturing process for grounding the slider 2. Further, since the actuator 4 can be bonded to the suspension 3 with a normal adhesive, the bonding strength can be increased as compared with the case where a conductive adhesive is used.
[0042]
The magnetic head according to the third aspect (the present invention) has a wiring pattern including a wiring electrically connected to the electromagnetic transducer and a ground wiring electrically connected to the slider. The wiring pattern includes a close wiring that closely contacts the suspension and a floating wiring that extends from the suspension to the slider, and the close wiring is movable and / or deformable in the direction of displacement of the slider by the actuator.
[0043]
FIG. 7 shows a configuration example of the third mode. FIG. 7 is a plan view showing a state in which the slider 2 is attached to the suspension 3 via the actuator 4 as viewed from the disk medium facing surface side of the suspension 3.
[0044]
In FIG. 7, a wiring pattern formed of a flexible wiring board including a signal wiring 51 electrically connected to the electromagnetic transducer of the slider 2 is provided. This wiring pattern is composed of a contact wiring 5A that is in close contact with the surface of the suspension 3 and a floating wiring 5B that extends from the suspension 3 to the slider 2. Reference numeral 52 in the drawing denotes an actuator drive wiring, which is provided in close contact with the surface of the suspension 3.
[0045]
The wiring pattern including the contact wiring 5A and the floating wiring 5B is formed by first forming a contact wiring made of a flexible wiring substrate on the medium facing surface of the suspension 3, and then removing the tip of the suspension 3 to form a part of the contact wiring. In a floating state. In the illustrated example, a terminal electrode group 94 composed of four terminal electrodes is formed in advance at the distal end of the flexible wiring board, and then a part of the distal end of the suspension 3 is partially removed so that the vicinity of the terminal electrode group 94 is left as the terminal electrode plate 32. Has been removed. Then, the floating wiring 5B is bent or bent toward the slider 2, the terminal electrode plate 32 is adhered to the rear surface side of the slider 2 in the drawing, and the terminal electrode group 94 is connected to the terminal electrode group of the slider 2. However, it is not essential to form the terminal electrode plate 32, and the floating electrode 5B may be directly connected to the terminal electrode group of the slider 2. Partial removal of the suspension 3 can be performed by, for example, punching or wet etching.
[0046]
In FIG. 7, the floating wiring 5B is formed so as to be connectable to the terminal electrode group of the slider 2 and to be movable and / or deformable in the displacement direction of the slider 2 by the actuator 4 in the connected state. I do. Therefore, the floating wiring 5B does not hinder the displacement performance of the actuator 4.
[0047]
The wiring pattern including the close contact wiring 5A and the floating wiring 5B includes a ground wiring 90 in addition to the signal wiring 51 electrically connected to the electromagnetic transducer. One end of the grounding wire 90 is connected to a grounding electrode 91 aligned with the terminal electrode group 94 formed on the floating wire 5B, and the other end is connected to a conductor having a ground potential (such as a housing of an HDD). ing. Since the ground electrode 91 is electrically connected to the slider 2 by a conductive adhesive, a gold ball, or the like, the slider 2 is grounded.
[0048]
In FIG. 7, the ground electrode 91 on the floating wiring 5B is electrically connected to the surface of the slider 2 where the electromagnetic transducer is formed. ₂ O ₃ When the low-resistance ceramic such as TiC is not exposed, by changing the position of the grounding electrode 91 as shown in FIG. 8, it is possible to connect to the side where the low-resistance ceramic is exposed. Further, as shown in FIG. 9, if the ground electrode 91 on the floating wiring 5B and the slider 2 are connected by the lead wire 8, the connection point to the slider 2 can be selected relatively freely. it can.
[0049]
In the third aspect, since the slider 2 is grounded using a flexible wiring such as the floating wiring 5B described above, the grounding of the slider 2 hardly hinders the displacement performance of the actuator 4. When the slider 2 is grounded, it is not necessary to change the structure of the actuator 4. In addition, the number of steps is smaller than in other aspects, which is suitable for automation of a production process.
[0050]
FIG. 10 shows another configuration example of the third mode. In FIG. 10, the ground wiring 90 is pulled out from the close-contact wiring 5A, and its end is fixed to the suspension 3 with the conductive adhesive 7b. In the case of this structure, the suspension 3 is made of a conductive material. Other configurations in FIG. 10 are the same as those in FIG.
[0051]
In the third embodiment, the contact wiring 5A may be formed on the surface of the suspension 3 not facing the medium, and the floating wiring 5B connected to the contact wiring 5A may pass over the suspension 3 and reach the slider 2. .
[0052]
In the magnetic head according to the fourth aspect (the present invention), the distal end of the suspension bends or bends toward the slider, and the distal end has a flexible region movable and / or deformable in the direction of displacement of the slider by the actuator. Having. A wiring pattern is in close contact with the surface of the flexible region, and the wiring pattern includes a wiring electrically connected to the electromagnetic transducer and a ground wiring electrically connected to the slider.
[0053]
The magnetic head of the fourth embodiment can be manufactured by a method similar to that of the magnetic head of the third embodiment. For example, in FIG. 7 showing the third embodiment, the space between the terminal electrode plate 32 and the suspension 3 is completely removed. However, when the magnetic head of the fourth embodiment is manufactured, the terminal electrode plate 32 and the suspension 3 are removed. 3 may not be completely removed, and a part thereof may be left in a state where the wiring pattern is in close contact. Then, like the terminal electrode plate 32 shown in FIG. 7, the distal end of the suspension may be bent or bent so as to reach the slider 2 beyond the actuator 4. In the case of such a configuration, the suspension distal end can be bent or bent as described above, and has low rigidity to the extent that it can be moved and / or deformed in the direction of displacement of the slider by the actuator. There is a need. Such a flexible region having low rigidity can be formed by forming the close contact wiring as described above and then etching both sides of the suspension distal end portion, but is processed in advance into a shape that reduces the rigidity of the distal end portion. A suspension may be used. Note that, also in the fourth embodiment, the terminal electrode plate 32 is not essential as in the third embodiment.
[0054]
In the above, the magnetic head of the HDD among the recording / reproducing heads has been described. 2. Description of the Related Art A conventional optical disk device utilizes an optical pickup including an optical module having at least a lens. In this optical pickup, the lens is mechanically controlled so that the recording surface of the optical disc is focused. However, recently, near field recording has been proposed as a method for dramatically increasing the recording density of an optical disc [NIKKEI ELECTRONICS 1997.6.16 (No. 691), p. 99] In this near-field recording, a flying head is used. This flying type head uses a slider similar to the flying type magnetic head, and the slider has an optical module having a hemispherical lens called SIL (solid immersion lenses), a magnetic field modulation recording coil, and a prefocus lens. It incorporates A flying head for near field recording is also described in US Pat. No. 5,497,359. In such a flying head, since a tracking accuracy needs to be improved with an increase in recording density as in the case of a magnetic head for an HDD, a minute displacement actuator is effective. Therefore, the present invention can be applied to such a recording / reproducing head (optical head) for an optical recording medium.
[0055]
More generally, an optical head to which the present invention can be applied has a slider similar to the above-described magnetic head, and incorporates an optical module into this slider or constitutes the slider itself from the optical module. The optical module has at least a lens, and further incorporates a lens actuator, a magnetic field generating coil, and the like as necessary. As such an optical head, in addition to the above-described floating head for near-field recording, an optical head in which a slider slides on the surface of a recording medium, that is, a pseudo contact type or contact type optical head is exemplified. The case where the present invention is applied to an optical head can be easily understood by replacing the electromagnetic transducer with an optical module in the above description. In addition, the present invention can be applied to a pseudo contact type or a contact type magnetic head.
[0056]
In the present specification, the recording / reproducing head is a concept including a recording / reproducing head, a recording-only head, and a reproducing-only head, and a recording / reproducing device similarly includes a recording / reproducing device, a recording-only device, and a reproducing-only device. Concept. Further, the recording medium is not limited to a recordable medium, but includes a read-only medium such as a read-only optical disk.
[0057]
【The invention's effect】
According to the recording / reproducing head support mechanism of the present invention, the slider can be grounded without hindering the displacement performance of the actuator. Therefore, the electrostatic breakdown of the electromagnetic transducer or the optical module can be achieved without sacrificing the positioning accuracy. Can be prevented.
[Brief description of the drawings]
FIG. 1 is a side view showing a configuration example of a magnetic head according to a first embodiment, showing a state where a slider is attached to a suspension via an actuator.
FIG. 2 is a plan view showing another configuration example of the magnetic head according to the first embodiment, showing a state in which a slider is attached to a medium facing surface of a suspension via an actuator.
FIG. 3 is a side view showing another configuration example of the magnetic head of the first embodiment, showing a state where a slider is attached to a suspension via an actuator.
FIG. 4 is a side view showing a configuration example of a magnetic head according to a second embodiment, showing a state where a slider is attached to a suspension via an actuator.
FIG. 5 is a side view showing another configuration example of the magnetic head of the second embodiment, showing a state where a slider is attached to a suspension via an actuator.
FIG. 6 is a side view showing another configuration example of the magnetic head of the second embodiment, showing a state where a slider is attached to a suspension via an actuator.
FIG. 7 is a plan view showing a configuration example of a magnetic head according to a third embodiment, showing a state where a slider is attached to a medium facing surface of a suspension via an actuator.
FIG. 8 is a plan view showing another configuration example of the magnetic head according to the third embodiment, showing a state where a slider is attached to a medium facing surface of a suspension via an actuator.
FIG. 9 is a plan view showing another configuration example of the magnetic head according to the third embodiment, showing a state in which a slider is attached to a medium facing surface of a suspension via an actuator.
FIG. 10 is a plan view showing another configuration example of the magnetic head according to the third embodiment, showing a state where a slider is attached to a medium facing surface of a suspension via an actuator.
FIG. 11 is an exploded perspective view showing a configuration example of a magnetic head support mechanism.

Claims (4)

A slider provided with an electromagnetic transducer or an optical module, and a suspension, wherein the slider is supported by the suspension via an actuator for displacing the slider;
It has a wiring pattern including a wiring electrically connected to the electromagnetic transducer or the optical module, and a ground wiring electrically connected to the slider. A recording / reproducing head support mechanism including a floating wiring extending to the slider and movable and / or deformable in the direction of displacement of the slider by the actuator. A slider provided with an electromagnetic transducer or an optical module, and a suspension, wherein the slider is supported by the suspension via an actuator for displacing the slider;
The tip of the suspension bends or bends toward the slider, and the tip has a flexible region movable and / or deformable in the direction of displacement of the slider by the actuator;
A wiring pattern is in close contact with the surface of the flexible region, and the wiring pattern includes a wiring that electrically connects to the electromagnetic transducer or the optical module and a ground wiring that electrically connects to the slider. Reproduction head support mechanism. 3. The recording / reproducing head support mechanism according to claim 1, wherein the suspension is made of a conductive material, and the ground wiring is drawn out from the wiring pattern and is electrically connected to the suspension. A recording / reproducing apparatus having the recording / reproducing head support mechanism according to claim 1.

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