JP3716340B2 - Integrated lead magnetic head suspension - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to a new laminate for use in improved magnetic head suspension assemblies, particularly head suspension assemblies (HSAs).
[0002]
[Prior art]
  The suspension assembly is a spring structure in the disk drive that positions the read / write head assembly at a position in nanometers away from the high speed rotating surface of a rotating disk or other data storage device. The suspension assembly applies a precise force at a precisely determined position to push the head toward the disk surface. The head assembly "floats" on the uneven surface of the disk at a height determined by the balance between the downward force of the suspension assembly and the increasing lift of the airflow generated by the spinning disk as the head approaches the disk. To do.
[0003]
  The head suspension assembly (HSA) includes a suspension assembly, a head assembly, and an electrical interconnect assembly. The interconnect assembly is a collection of parts configured to send and receive data signals to and from the head assembly. HSA can be used in other types of drive devices such as magnetic hard disk drives that are most common today and optical disk drives.
[0004]
  The suspension assembly includes two spring structures, a load beam and a gimbal, each of which is a combined balance of rigid and flexible spring regions. The load beam is lateralStiffnessAn elastic spring plate that is designed to provide the necessary load to the head assembly.
[0005]
  The gimbal is a spring disposed at the tip of the suspension assembly and load beam. The gimbal holds the head assembly at a fixed distance in an appropriate orientation (floating position) above the outer shape of the disk even when the load beam is deflected or twisted. The head assembly is mounted on a gimbal and provides a “head” or high sensitivity read / write transducer mounted on an air bearing slider. The head assembly also includes electrical terminals configured to be interconnectable with the interconnect assembly for receiving and relaying data (reading and writing signals).
[0006]
  A magnetic read / write transducer converts the electrical write signal into a small magnetic field. The magnetic field forms a magnetic domain pattern on the magnetic disk. A bit code representing stored data is defined by the order of the magnetic field and the accompanying orientation. When the magnetic read transducer floats over these domains, it reads them back into electrical signals.
[0007]
  The suspension assembly can be attached at its proximal end to a rigid arm, or directly to a linear or rotational movement actuator. The actuator rapidly moves (and then stops suddenly) the HSA above any radial position on the disk. Such radial movement of the HSA and rotation of the disk allows the head to quickly reach any position on the disk surface. A very high stress is generated in the HSA due to a sudden stop and start action.
[0008]
  As the head assembly floats closer to the surface of the magnetic disk, information can be stored with higher density. (The strength of the magnetic field is proportional to the square of the floating distance. The magnetic “spot” becomes smaller). Disk drive manufacturers are striving to achieve a floating gap close to 100 nanometers = 0.1 micrometers (a human hair is about 100 micrometers thick). However, if it collides with a rotating disk (rotating at a speed of about 3600 rpm or more), the head, the surface of the disk, and the stored data are destroyed, so the head assembly contacts the disk ("crash"). must not.
[0009]
  The amplification and control electronics process the data signal, send it to the head assembly, and receive from it. Conducting signals requires a conductor between the dynamic “floating” head and the circuit. Conventional head assemblies typically complete a read / write circuit loop with two conductors encapsulating copper wire in a plastic sheet material. Modern magnetoresistive head assemblies require four or more independent conductors. The interconnect assembly includes conductors and associated insulators and connectors.
[0010]
  HSA designers and manufacturers face competing limited design considerations. In operation, the suspension assembly should not be subject to unpredictable loads and biases that change the exact positioning of the head assembly. The suspension assembly must respond instantaneously to changes in the disk surface condition. Changes in the flying height of the head can have a significant impact on data density and accuracy, and even destroy the system in the event of a collision.
[0011]
  Stiffness and stiffnessIncreases in proportion to the cube of the cross-sectional thickness. In order to keep the floating head in the proper orientation in response to changes in airflow, the suspension assembly is very thin and highly flexible, especially near the sensitive spring and gimbal areas. The conductors of the interconnect assembly have a great influence on the performance of the suspension assembly. ConductorStiffnessOnly the stiffness of the spring regionsexAnd the floating performance is greatly affected. A standard conductor placed on top of a thin suspensionStiffnessMay be more than doubled, reducing the ability of the spring region to adjust to disc surface variations, vibration and movement. The effect of the conductor on the gimbal region, which is the thinnest and most delicate spring in the suspension assembly, is even more pronounced. A conductor placed on the spring region must not be plastically deformed (permanently bent) when the spring region bends, but such deformation prevents the spring from returning to its normal position and causes the suspension assembly to This is because a load is applied.
[0012]
  An ideal HSA is composed of a member having a small mass. An excessive momentum generated by an excessive mass may cause an overshoot error. An overshoot error occurs when the entire HSA moves past the planned stop point due to the amount of movement during the positioning movement. Low mass HSA is also easy to move, so power can be saved in a multiple platter disk drive.
[0013]
[Problems to be solved by the invention]
  The production of HSA is similar for any commodity, but must be efficient. It is desirable to reduce the manufacturing stage. Damaged or misaligned components introduce bias and load, greatly reducing effective manufacturing yield. Complex shapes and assembly processes are expensive and reduce the reliability of the overall HSA manufacturing process.
[0014]
  Accurate tolerances are needed to avoid problems and unpredictable loads and biases. During the manufacturing and assembly process of the HSA, the accumulation of deviations from the tolerance limits creates plane deviations that can affect the floating posture of the head assembly. The parameters of static roll torque and static pitch torque in the final product HSA are due to their inherent manufacturing and assembly tolerance accumulation.
[0015]
  Current interconnect assemblyWire lead wire used forThe installation and installation are generally performed manually. Manual installation is inaccurate and expensive. Accurate conductor placement is particularly important in the sensitive gimbal region. As the slider / transducer dimensions are being scaled down to increase data storage density in the field, current interconnect device limitations increase the potential for read / write errors and increase data storage density limits. Is limiting.
[0016]
  Using current interconnect technology, workers can use 2-5 wires-Attach the wire to the head assembly, but use a fixture to-The head assembly is attached to the stainless steel suspension while manipulating. Next, use tweezers or tools to wire-To form a service loop between the head assembly and sun suspension assembly,-The suspension assembly on the given wire-Enable positioning along the path. Wire formed on adhesive or suspension-Wire using mooring mechanism-Fasten to the suspension. Special care is taken so that the service loop is not pulled too much or is not too loose. The tensioned service loop creates an undesirable torque on the slider that creates a floating attitude error. Wire in a loose service loop-May sag and rub the rotating disc. In both states, the drive performance of the disk is the worst. Slider and wire-During the handling process, the wire-Or there is a risk of damaging delicate load beams and gimbals. Load beams or gimbals that are bent in error during manufacturing operations are discarded. In many cases, the head assembly cannot be repaired, which increases the pile of garbage.
[0017]
  In view of the above circumstances, the present invention provides a conductive trace instead of a wire conductor. ( An object of the present invention is to provide a magnetic head suspension comprising a laminated structure integrated with the head suspension using a lead wire.
[0018]
[Means for Solving the Problems]
  To achieve the above objective,The present invention relates to a novel laminated structure used for a head suspension assembly (HSA).have. That is,The arrangement comprises a load beam and a gimbal means for attaching to an actuator arm in a disk drive.LeadIntegratedMagnetismQi head suspension,
  The load beam includes a base region for attaching the actuator arm to a proximal end portion, and has a load projection near the distal end portion, and a plurality of patterns projected on the surface of the load beam A pair of spaced-apart finger portions that are insulated from the surface of the load beam, the conductive trace projecting from the tip of the load beam and having electrical conductivity and springiness Forming
  The gimbal means comprises at least a tongue piece portion provided on a lateral leg member facing away from the distal end portion of the load beam and having a slider mounting surface to which a head slider is attached, and the spaced finger portion. The tongue portion is supported by the lateral leg member that interconnects the finger portion that is separated from the tip of the load beam and protrudes from the tip of the load beam so as to be rotatable about a pitch axis, And at least one of the finger portions is electrically insulated from the lateral leg member and extends over the tongue portion,
  When the head slider is attached to the slider mounting surface of the tongue piece, the head slider moves in the longitudinal direction of the gimbal means as the head slider moves relative to the surface of the magnetic medium. Aligned with the longitudinal axis of the load beam so that it can pivot between the legs of the
  The gimbal means is configured such that when the head slider is attached to the tongue piece portion, the projection for loading the load beam engages the head slider at a point of action of lift by aerodynamics of the head slider. And at least one of the conductive traces is electrically connected to the head slider.
[0019]
  The present invention is a novel laminated structure used for a head suspension assembly (HSA).The laminated structure of the present invention comprises an interconnect assembly.(Sheet conductive trace)And suspension assemblyWithBy unifying, the handling process by hand of the conductor is eliminated. By reducing the handling process, damage due to the handling process can be minimized, thus reducing the number of damaged parts and increasing the manufacturing yield. Because the suspension assembly and interconnect assembly are manufactured together, component alignment variation (standard deviation) is minimized. Thus, errors during mechanical work are reduced. The conductor placement is always accurate and does not require manual installation which is costly and time consuming during assembly. Fewer handling processes, fewer bent parts, and fewer assembly errors increase the stability of the floating height performance and make the manufacturing process more efficient.
[0020]
  Also,The first step in producing a laminated structure is to prepare a multilayer laminated sheet. The sheet has a first layer made of a metal spring material, an intermediate second layer made of an electrically insulating, preferably adhesive material, and a third layer made of a conductive material. The second layer has a minimum spring characteristic applied to the entire laminated structure. The third layer can be a conductive spring material such as beryllium copper.
[0021]
  The second step is to start the layer from the outsideShape multiple layersIt is to be formed. The method for forming the necessary pattern in the layer is by etching. The main spring component is formed by etching the first layer. At least one conductive trace is formed from the third layer etch, the conductive trace including at least one elongated conductor configured to be electrically connected to the head assembly and to function as an auxiliary mechanical spring component in a selected region. It is. From the second layer, a panel having a shape corresponding to the contact area between the structural portions remaining after the etching for forming the components of the first and third layers is formed.
[0022]
  In order to complete the manufacture of the head suspension assembly (HSA)ConductiveThe trace is electrically connected to the head assembly and the laminated structure is attached to other parts of the HSA.
[0023]
  Laminate structures include interconnect assemblies, interconnect / suspension assemblies, and gimbal / interconnect assemblies. The interconnect assembly is attached to the load beam and provides at least one conductive trace. The second layer can be a dielectric electrical insulator and the third layer can be provided with support and rigid plates.
[0024]
  The interconnect / suspension assembly includes an interconnect assembly and a suspension assembly, the suspension assembly being provided with a gimbal and a load beam with a rigid region and a spring region. The gimbal can be formed from the first layer, the third layer, or both. The spring region of the load beam can also be formed from either or both layers.
[0025]
  The first embodiment of the interconnect / suspension assembly includes a first layer of stainless steel, a thin second layer of polyimide, and a third layer of beryllium copper. The first layer is provided with a flat load beam plate including a rigid region. The third layer is provided with at least one conductive trace for electrical connection to the head assembly, each conductive trace having a gimbal region at the distal end portion and a load beam region at the proximal end portion. The gimbal region is shaped to form a gimbal longitudinal arm. The second layer is provided with at least one panel, which is disposed between the overlapping portions of the first and third layers to insulate them from each other.
[0026]
【The invention's effect】
  In the laminated structure constituting the magnetic head suspension of the present invention, the (hand-like conductive trace) of the interconnect assembly and the suspension assembly are integrated, thereby eliminating the handling process of the conductor by hand. By reducing the handling process, damage due to the handling process can be minimized, thus reducing the number of damaged parts and increasing the manufacturing yield. Because the suspension assembly and interconnect assembly are manufactured together, component alignment variation (standard deviation) is minimized. Thus, errors during mechanical work are reduced. The conductor placement is always accurate and does not require manual installation which is costly and time consuming during assembly. Fewer handling processes, fewer bent parts, and fewer assembly errors increase the stability of the floating height performance and make the manufacturing process more efficient.
[0027]
DETAILED DESCRIPTION OF THE INVENTION
  1-3 show an HSA 12 aligned with a longitudinal axis 18 formed in accordance with the present invention. The HSA 12 includes an interconnect / suspension assembly 14 and a head assembly 20 attached to the distal end of the interconnect / suspension assembly 14. The interconnect / suspension assembly 14 is a load beam72And an electrical signal interconnect assembly 15 and a gimbal 40.
[0028]
  The suspension assembly 14 is provided with a base end portion 33, a tip end portion 34, a base region 35 close to the base end portion 33, a rigid region 37, and a spring region 36 between the base region and the rigid region 37. .As is apparent from FIG. 1, the load beam 72 Is the rigid area 37 , Spring region 36 And base area 35 Is formed by.The spring region 36 includes a spring region 36StiffnessRelatively sized spring apertures 38 are formed that can be selected to adjust.
[0029]
  Interconnect assembly 15 extends over the entire length of suspension assembly 14.Plate-like6 conductive traces 71 and figure3Insulating regions 91, 92 and 93 shown inSuitableAppropriate electrical circuit connection means( Not shown )(In other embodiments, known connector means can be provided).
[0030]
  Conductive trace 71 is an elongate elastic pre-patterned conductor that connects the electrical signal from head assembly 20 along its HAS 20 beyond its proximal end to amplification and control electronics (not shown). . The conductive trace 71 is provided with a proximal end portion 73 and a region 74 near the distal end portion of the load beam. The width and thickness of the conductive trace 71 depends on the mechanicalStiffnessAnd / or its electrical resistance can be varied in or within various regions to vary.
[0031]
  As shown in FIG.The load beam 72 is provided with a base base region 75, an intermediate spring region 76, and a tip rigid region 77. In this embodiment, the gimbal region 80 of the conductive trace 71 functions as a part of the gimbal assembly 40. Due to the mechanical and electrical properties of the BeCu alloy used in the conductive trace 71, the third layer 70 can function not only as a conductor in the electrical interconnect assembly, but also as a mechanical spring component. it can. Because the present interconnect assembly 15 functions as both an electrical interconnect assembly and a mechanical gimbal spring, it is referred to as an integral gimbal / interconnect assembly.
[0032]
  In a form of the present invention, the stiff region 77 of the conductive trace 71 reinforces the resonant response of the interconnect / suspension assembly by providing additional supplemental stiffness to the stiff region 37 of the interconnect / suspension assembly 14. It also functions as a rigid region. In the illustrated form, the rigid region 77 of the conductive trace 71 reinforces the rigid region 37, and a conventional load beam does not require any rails or flanges normally used for that purpose. In other applications, both rigid traces and reinforcing rails or flanges may be used to obtain the desired performance characteristics of the suspension.
[0033]
  Increasing the thickness and / or width of the rigid region 77 of the conductive trace 71 reduces their electrical resistance while reducing their electrical resistance.StiffnessCan be high. In FIG. 1, the conductive trace 71 extends slightly from the proximal end 33 of the HSA 12. Conductive traces 71 extend back to the amplification and processing circuitry provided on the actuator arm (not shown) or on the frame of the disk drive (not shown), or to the intermediate wiring harness as required Can be connected.
[0034]
  FIG. 2 is an enlarged detailed view showing the gimbal 40 together with the slider 21. The gimbal assembly disclosed here is similar to a “Watlas” gimbal in which a slider 21 is mounted on a so-called “T-shaped flexure”. The lateral leg member 51 is connected to the distal end portions of a pair of parallel fingers 47 straddling the tongue piece portion 52 in the central notch region.The
[0035]
  The gimbal 40 provides gimbal support for the head slider assembly 20. It is the optimum distance from the head assembly 20 with respect to the recording surface of the rotating disk in the correct mounting orientation, regardless of the movement and twist experienced by the suspension assembly 14 during actuator operation, or slight changes in the phase of the disk surface. To maintain.
[0036]
  In the form of the invention disclosed herein, the gimbal 40 includes a pair of parallel flexible finger portions 47 that surround two sides of the opening 41. In the illustrated form, each of the flexible finger portions 47 is comprised of a group of conductive traces. In conventional Watlass type suspensions, the T-shaped flexure is formed as a separate body and is typically permanently affixed to the load beam by welding or other methods. Such conventional Watlas flexures form a pair of parallel fingers that surround the central opening by punching or etching. In such a conventional flexure structure, a tongue piece portion that can be rotated around the supporting pitch axis hinge and protrudes into the opening between the parallel fingers from the lateral leg plate connecting the tip portions of the parallel fingers. A slider is attached to. In conventional flexure structures, the bottom surface of the slider is generally much larger than the flexure. That is, since the slider spans the entire width of the aperture and parallel outer fingers, it is necessary to form the slider by shifting the plane of the central tongue so that it is displaced above the plane of the fingers, slider and the rest of the load beam. It is.
[0037]
  In the form disclosed here, the overall structure is very different because the gimbal 40 not only performs the same mechanical function as the Watlass flexure, but also performs an electrical function that was not conceivable in the prior art. For example, in the present invention, there is no separate flex structure that needs to be welded to the load beam. Instead, a portion of the conductive trace 71 along the longitudinal direction of the suspension assembly 14 extends from the distal end of the suspension assembly 14 and mechanically acts as a pair of parallel fingers 47 in the flexure region.
[0038]
  Lead wires, ie, parallel fingers (finger portions) 47 of conductive trace 71, each have a thickness and an overall cross-section that can collectively perform the same mechanical spring function as conventional Watlas flexure sheet metal fingers. .
[0039]
  In particular, as shown in FIG. 2, the parallel fingers 47 are not supported by the sheet material of the load beam tip 48 which is the main structure of the suspension assembly 14. They are within the deflection areaInsulation areaA layer of dielectric material such as 90, 91 or 92 may or may not be provided on top. 1-3, no dielectric material is provided on the unsupported conductive trace 71 in the flexure region (finger portion) 47. In the embodiment shown in FIG.
[0040]
  As shown in FIG. 2, the width or cross-sectional area of the conductive trace 71 increases at the tip of the suspension assembly 14 so that the conductive trace 71 is supported by the suspension assembly 14 and its unsupported deflection. The strength of the transition region between the portion acting as the parallel finger 47 of the portion is increased.
[0041]
  Lateral direction of the gimbal and the entire suspensionStabilityTo further improve the lateral directionStuffnessStrengthendidAn island 49 is shown as part of the structure of parallel fingers 47. The island is made of a stainless steel alloy of the same material as the structural load beam and is generally the same thickness as the load beam, and a dielectric coating is provided between the stainless steel island 49 and the parallel fingers 47 of the conductive trace 71. It has been. The island 49 is easiest to manufacture as part of the same etching process of the stainless / dielectric / conductor laminate used to manufacture the rest of the suspension.
[0042]
  Horizontal leg member (horizontal leg plate) 51TheIt is typically formed from the same initial material of a stainless steel alloy that is used to produce the rest of the splint. The width of the horizontal leg member 51 may be smaller than the total width of the parallel fingers 47, but may be the full width as shown in FIG.
[0043]
  The head slider 20 is fixed to the tongue piece portion 52 protruding from the lateral leg member 51, but is used to adhere the slider to the tongue piece portion 52 of the lateral leg member 51, as shown in FIG. One or more curing holes 53 can be provided in the tongue piece portion 52 to facilitate transmitting UV curing radiation to the adhesive.
[0044]
  After attaching the slider to the tongue portion 52, an appropriate electrical connection is made between the terminal 23 of the slider 20 and the conductive trace 71.RuWire-A connection method is used.
[0045]
  As with the prior art Watlass type suspension, a load projection 60 is provided at the tip of the suspension assembly 14, which in the form of the present invention shown in FIGS. And an appropriate load force is applied at a point that coincides with the center of lift of the slider.
[0046]
  Moreover, as shown in FIG. 3, the 1st step which manufactures the laminated structure of this invention is preparing a multilayer laminated sheet. The sheet is a first layer made of a metal spring material. 50 And an intermediate second layer made of an electrically insulating, preferably adhesive material 90 And a third layer made of a conductive material 70 And have. 2nd layer 90 Has the minimum spring characteristic applied to the entire laminated structure. 3rd layer 70 Can be made of a conductive spring material such as beryllium copper.
[0047]
  In the illustrated form, a conductive trace 71 is placed on the upper surface of the suspension. Such an arrangement is particularly suitable for connecting the terminal pads 22 and 23 to the illustrated slider 20 located on the end wall of the slider. The connection to the end wall mounted slider pad is a wire-This is easily performed by a known bridging connection technique such as bonding.
[0048]
  Alternatively, the conductive trace 71 can be attached to the suspension on the side opposite to the attachment side in the form shown in FIGS. Such an arrangement facilitates connection with a slider having a shape in which the terminal pads are provided on the upper surface rather than the end walls. In such a structure, the wire on the pad on the upper surface of the slider-In order to facilitate the bridging connection by bonding, the conductive trace may be extended so as to cover almost the entire surface of the tongue portion 52.
[0049]
  The present invention is not limited to the above detailed description, and various modifications can be made without departing from the scope of the claims.
[Brief description of the drawings]
FIG. 1 is a perspective view of a head suspension assembly according to the present invention.
FIG. 2 is a detailed enlarged view of a gimbal of the head suspension assembly shown in FIG. 1;
FIG. 3 is an exploded perspective view of the suspension assembly shown in FIG. 1 with an exposed portion of the second layer removed by etching.
[Reference in the drawing]
  12 Head suspension assembly
  20 Head slider assembly
  21 Head slider
  35 Base area
  36 Spring area
  37 Rigid area
  40 Gimbal (flexure)
  47 Parallel fingers
  51 Horizontal leg member
  52 Tongue pieces
  71 Conductive trace
  72 Load beam

Claims (7)

And a load beam (72) and the gimbal means (40), a magnetic head suspension leads integrated for mounting to an actuator arm in a disk drive unit,
The load beam ( 72 ) includes a base region ( 35 ) for attaching the actuator arm to a proximal end portion ( 33 ) , and has a load projection ( 60 ) in the vicinity of the distal end portion. , comprising a plurality of conductive traces (71) which is patterned on a surface of said load beam (72), at least one conductive trace (71), is insulated from the surface of the load beam (72), the conductive A trace ( 71 ) projects from the tip of the load beam ( 72 ) to form a pair of spaced finger portions ( 47 ) having electrical conductivity and springiness,
The gimbal means ( 40 ) includes at least a tongue piece portion ( slider mounting portion ) provided on a lateral leg member ( 51 ) facing away from the tip of the load beam ( 72 ) and having a slider mounting surface to which the head slider ( 21 ) is attached. and 52), the configured out with spaced finger portions (47), said tongue portion (52) protrudes from said load beam (tip distant from the tip of 72) and said load beam (72) The lateral leg member ( 51 ) interconnecting the finger portions ( 47 ) is supported so as to be pivotable about a pitch axis, and at least one of the separated finger portions ( 47 ) is supported by the lateral leg member ( 47 ). 51 ) is electrically insulated from and extends over said tongue piece portion ( 52 ) ;
Said spaced finger portions (47), a head slider (21) when mounted on the slider mounting surface of the tongue portion (52), the said head slider (21) moves relative to the surface of the magnetic medium between the longitudinal direction of the leg portion to allow rotation movement of the head slider (21) is gimbal means (40) with the, and then displaced to the outside in alignment with the longitudinal axis of said load beam (72) And
Said gimbal means (40), when said head slider (21) is attached to the tongue portion (52), said projections for the load of said load beam (72) (60), said head slider (21 ) Is aligned with the load beam ( 72 ) so as to engage with the head slider ( 21 ) at the point of aerodynamic lift, and at least one of the conductive traces ( 71 ) has the head slider ( 21). magnetic head suspension you characterized by being electrically connected to). Conductive traces ( 71 ) are patterned on the head slider mounting side of the load beam ( 72 ) and T-shaped gimbal means ( 40 ) to facilitate electrical connection to the terminal pads on the end walls of the head slider ( 21 ). The magnetic head suspension according to claim 1, wherein the magnetic head suspension is provided. Conductive traces ( 71 ) are placed on the opposite side of the head slider mounting side of the load beam ( 72 ) and T-shaped gimbal means ( 40 ) to facilitate electrical connection to the terminal pads on the upper surface of the head slider ( 21 ). The magnetic head suspension according to claim 1, wherein the magnetic head suspension is provided in a pattern. The tongue portion ( 52 ) of the gimbal means ( 40 ) is provided with at least one hole ( 53 ) , thereby irradiating the adhesive between the head slider ( 21 ) and the tongue portion ( 52 ). 2. The magnetic head suspension according to claim 1, wherein the adhesive is easily cured. The magnetic head suspension according to claim 1, wherein the cymbal means ( 40 ) further includes an island ( 49 ) , and the island is configured as a part of the finger portion ( 47 ) . At least one of the pair of parallel finger portions ( 47 ) is composed of two or more conductive traces ( 71 ) , adjacent to the lateral stiffness enhancing island to enhance the lateral stiffness of the gimbal means ( 40 ). The magnetic head suspension according to claim 1, wherein the magnetic head suspension is adhered to the conductive trace ( 71 ) insulated from the conductive trace. One or more cross-sectional areas of the conductive trace ( 71 ) increase near the tip of the gimbal means ( 40 ) , thereby creating a pair of parallel finger portions ( 47 ) in the transition region of the load beam tip. The magnetic head suspension according to claim 1, wherein the magnetic head suspension is strengthened.

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