CN1185855A - Suspension with integrated conductor having controlled capacitance - Google Patents
Suspension with integrated conductor having controlled capacitance Download PDFInfo
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- CN1185855A CN1185855A CN97190246A CN97190246A CN1185855A CN 1185855 A CN1185855 A CN 1185855A CN 97190246 A CN97190246 A CN 97190246A CN 97190246 A CN97190246 A CN 97190246A CN 1185855 A CN1185855 A CN 1185855A
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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
- G11B5/486—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 with provision for mounting or arranging electrical conducting means or circuits on or along the arm assembly
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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
- G11B5/4853—Constructional details of the electrical connection between head and arm
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B25/00—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus
- G11B25/04—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus using flat record carriers, e.g. disc, card
- G11B25/043—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus using flat record carriers, e.g. disc, card using rotating discs
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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
- G11B5/012—Recording on, or reproducing or erasing from, magnetic disks
-
- 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
- G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
- G11B5/027—Analogue recording
- G11B5/035—Equalising
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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
- G11B5/4813—Mounting or aligning of arm assemblies, e.g. actuator arm supported by bearings, multiple arm assemblies, arm stacks or multiple heads on single arm
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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
- G11B5/4833—Structure of the arm assembly, e.g. load beams, flexures, parts of the arm adapted for controlling vertical force on the head
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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
- 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
- G11B2005/0013—Controlling recording characteristics of record carriers or transducing characteristics of transducers by means not being part of their structure of transducers, e.g. linearisation, equalisation
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
- G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
- G11B2220/2508—Magnetic discs
- G11B2220/2516—Hard disks
Landscapes
- Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
- Supporting Of Heads In Record-Carrier Devices (AREA)
- Networks Using Active Elements (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Abstract
A suspension having integrated conductors for supporting and electrically interconnecting a read/write head to electronic circuitry in a disk drive. The capacitance to ground of the conductors is controlled by the selective placement of shaped voids in the suspension at regions adjacent to the conductor paths. Portions of the suspension may be generally the complement of the conductor structure shape.
Description
The present invention relates generally to be used in the disc driver to support structure and the electric capacity of generation and the control method of impedance near the integrated conductor of the levitation device of the read-write head of the recording medium of relative motion.In more detail, the present invention relates to integrated levitation device and conductor structure, wherein levitation device comprises the space, makes that the each several part in the levitation device is replenishing of conductor structure on the whole, the invention still further relates to the method for making this levitation device.
Present disk drive generally comprises a rigidity memory disc and a steady arm of rotation, and the latter is used for data converter is positioned at different radial position with respect to the rotating shaft of spiraling, so as to the many concentric data storage roads of regulation on each recording surface of dish.Steady arm is commonly referred to as driver.Though many activation configurations are arranged in the prior art, but the most frequently used is direct-insert rotary voice coil actuator, and this is because they are simple, the performance height, and can be around the rotation of rotating shaft mass balance ground, this latter is important for reducing driver to the sensitivity of disturbing.Use the closed loop servo system function driver, located with respect to panel surface so as to making head.
The read-write converter can be designed to unit piece or dual-element, and it generally is set on the ceramic slide construction, and slide construction has an air loading surface, is used to support converter and leaves the little distance in moving medium surface.The unit piece design generally requires two lines, and 4 lines of dual-element designing requirement.Especially magnetic resistance (MR) requires 4 lines as first.The combination of air bearing sliding part and read-write converter also is called read/write head or record-header.
Sliding part generally is installed on the flexible structure that cross pin type joint is housed that links to each other with the far-end of the loading beam structure of levitation device.A spring makes loading beam and makes head to the dish skew thus, and the air pressure labour contractor at subfacies pushes away dish simultaneously.At this moment, equilibrium distance is determined " flying height " of head.This by utilizing " air support " supporting member leaves panel surface, the head head/dish interface in the hydrodynamic lubrication mode under rather than under the boundary lubrication mode, operate.Air supports and keeps separating between converter and the medium, and this has reduced the efficient of converter, yet, avoid directly contact but to improve the reliability and the serviceable life of head and disc elements greatly.Yet, may still require head to contact or even under the boundary lubrication way of contact, operate in puppet in order to increase area density.
The disk drive manufacturing industry is devoted to reduce the size and the weight of slider structure always, so that reduce the moving-mass of actuator assembly, make the more close panel surface of operation of converter, the former searches performance at improvement, the latter improves converter efficiency, thereby realizes higher area density.The size of sliding part (so quality) is usually with reference to so-called standard 100% sliding part (small-sized sliding part) regulation.Therefore, term 70%, 50% and 30% sliding part (be called little sliding part, receive sliding part and skin sliding part) refer to newer inferior quality sliding part, and they have linear size, the percentage sign of the size of the small-sized sliding part of available standards.The cross pin type joint that the common requirement of less slider structure more is obedient to, thereby the intrinsic rigidity of the lead that links to each other with sliding part can produce tangible offset effect.
In order to reduce the intrinsic lead rigidity or the influence of skew, integrated flexibility/conductor structure has been proposed, wherein with insulation flexible synthetic resin flexible piece integral wire, make lead be exposed on and be positioned near the pad of the far-end of flexible piece, the United States Patent (USP) NO.5 of Matsuzaki, 006,946 has disclosed a kind of this example of structure.Though this structure has the advantage of some performance and assembling, flexible polymer resin material and cross pin type joint structure in the flexible piece that discloses are brought some design problems.For example, the thermal expansion properties of resin material is different with stainless steel material of the prior art, and the permanance that wherein contains this resin structure of required bonding coat also is unknown.Therefore, proposed the stainless steel flexible piece and the conductor structure that mix again, it has most of advantage of integrated conductor flex circuit, has kept simultaneously and the manufacture method of prior art and the compatibility of loading beam fixing means.This Mixed Design is used the stainless steel flexible piece usually, and insulation course and conductive layer that it has deposit are used for electrically connector and relevant driver electronics, for example prime amplifier chip and read channel circuit.
The flexible piece of these Mixed Design uses quite long conductor, extend to the near-end of flexible piece from solder joint, so that provide from read/write head to preposition amplification or the conductive path of read channel chip along the length of relevant suspension structure at an end of fixed head far-end, flexible piece.Because conductor extremely near the stainless steel flexible piece of the conduction of ground connection on loading beam but and its insulation, so the ground capacitance of conductor with respect to the discrete insulated conductor of routine to having increased.The electric capacity of this increase can make read/write head, the degradation of lead and preposition amplification system, thereby need little integrated flexible piece and the conductive structure of ground capacitance that can make and reliable.
The present invention especially provides a kind of flexible piece that is used for the levitation device of disk drive, and comprising the integrated conductor structure, its design is limited the stray capacitance between the other parts of conductor structure and suspension structure, and the method for making this structure is provided.
Levitation device according to most preferred embodiment of the present invention comprises flexible piece, has the space of one or several shaping in the flexible piece, and has the integrated conductor that extends along the flexible piece adjacent with the space.Integrated conductor replaces discrete insulated conductor of the prior art right, along the insulated conductor of relevant levitation device extension.Control the shape in flexible space and the physical dimension of conductor, to reduce the influence of undesirable conductor ground capacitance.In addition, can suitably constitute conductor tracks, to reduce the phase mutual capacitance of track.The invention provides improved electrical property, and the mechanical property of levitation device is not had big influence.
General purpose of the present invention provides a kind of small-sized, and is firm, and levitation device wherein has integrated conductor reliably, is used to connect read/write head and relevant read/write circuit, and it has overcome the restriction and the shortcoming of prior art.
Of the present invention one more specifically purpose provide the electric capacity of integrated flexible piece/conductor structure that a kind of read/write head that is used for the console panel driver uses or the method for impedance.
Another object of the present invention provides a kind of integrated flexible piece and conductor structure and a kind of manufacture method, makes the electric capacity and the impedance of conductor of the reading component of dual-element read/write head and writing component be respectively best.
Another object of the present invention provides a kind of improved levitation device that is used for the read/write head of supporting driver.
The invention provides a kind of method of economic and reliable, be used for electrically being mounted on converter on the sliding part and integrated flexible piece/conductor structure, the latter provides a cross pin type joint, and comprises exposure, is positioned near the conductive welding spots the sliding part installation region of far-end of conductor flexible piece.Solder joint and associated conductor are by insulation course and sliding part electrical isolation, and insulation course and conductor are fixed on the flexible piece together, and conductor extends in same plane along the flexible piece surface.Flexible piece comprises one or several space, and conductor and space are adjacent to extend.The form of conductor than and conductor middle ware distance be arranged so that the phase mutual capacitance that can reduce between the conductor, keep low ground capacitance simultaneously.The border in space is provided with like this, feasible avoiding along the impedance variation of conductive path interruption.
These and other purpose of the present invention, advantage, aspect and characteristics can fully understand after explaining most preferred embodiment of the present invention in conjunction with the accompanying drawings more.Wherein
Fig. 1 is the planimetric map according to the amplification of integrated flexible piece/conductor structure of the present invention.
Fig. 2 is the sectional view of integrated flexible piece/conductor structure of getting of the A-A along Fig. 1.
Fig. 2 A is another sectional view of integrated flexible piece/conductor structure shown in Figure 1.
Fig. 3 is the planimetric map according to the amplification of head gimbal head unit of the present invention (HGA), comprising loading beam, and integrated flexible piece/conductor structure, and read/write head.
Fig. 4 is the relation curve of expression conductor ground capacitance and adjacent gap length.
Fig. 5 A-5D is the example of various void shape, and they can be limited at according in integrated flexible piece/conductor structure of the present invention.
Fig. 6 is to use the typical reading circuit of integrated flexible piece/conductor structure, the equivalent circuit diagram of conductor and read/write head system.
Fig. 7 is the curve of transport function of the circuit of simulation drawing 6, wherein supposes a ground capacitance value that does not have the flexible piece in the space adjacent with conductor.
Fig. 8 is the curve of transport function of the circuit of simulation drawing 6, wherein suppose one by using the space adjacent with conductor available ground capacitance value.
Fig. 9 is the planimetric map according to disk drive of the present invention.
Referring to accompanying drawing, in whole accompanying drawings, the identical identical or corresponding parts of label representative, Fig. 1 are the planimetric maps according to the amplification of integrated flexible piece/conductor structure 10 of the present invention.Flexible piece/conductor structure 10 comprises the stainless steel flexible piece 12 that is plane, and its about 20 micron thickness, and comprise machining hole 14 and 15 are used for making and alignment member accurately between erecting stage.The conductive traces of the copper of a pair of about 10 micron thickness forms conductor structure 16, extends to a support on the neck 18 of flexible piece 12 from the near-end 17 of flexible piece 12.Conductor structure 16 comprises thin (for example 10 microns) insulating basement membranes 25 (for clarity sake omitted, but be shown among Fig. 2), between the conductive traces and stainless steel flexible piece 12 of conductor structure, is used to prevent the conductive traces short circuit of conductor structure 16.Flexible piece 12 comprises one or several space 20, and the path that its position and conductor structure 16 are walked is adjacent, is used to reduce the electric capacity between conductor structure and the stainless steel flexible piece 12.Correspondingly, the invention provides a kind of method, be used to control the integrated and electric capacity that produces of conductor structure 16 and stainless steel flexible piece 12.Just as is well known in the art, excessive conductor or lead capacitance are at relevant read/write head and the transmission of the signal between the pre-amplification circuit adverse effect being arranged.
In addition, because under sufficiently high frequency, conductor structure 16 is equivalent to transmission line for the signal that passes through between read/write head and read channel electronic circuit, so how much states in space are for control with to avoid along the unexpected variation of the signal path impedance of conductor structure 16 are key factors.Interrupted impedance variation can produce undesirable reflex in transmission line.Fig. 2 is the sectional view of integrated flexible piece/conductor structure 10 of getting of the A-A along Fig. 1.In the present embodiment, conductor structure 16 comprises polyimide (a kind of flexible polymer resin material) layer 24 of pair of conductive track 22 and insulation, and it is used to provide the support of conductive traces across space 20.In the present embodiment, a pair of track is provided with like this, makes it close as far as possible, so that reduce the phase mutual capacitance between the conductor.Though be not to be strict with, can use the supplemental dielectric layer of about 4 micron thickness, as the protective seam of track 22.Preferably there is such shape in the space, makes to change smoothly or quite continuously along the cross-sectional area in the space of flexible piece/conductor structure 10 length directions, thereby avoids along the impedance of the signal path that is limited by conductive structure variation suddenly taking place.Stride across in the zone on border of track 22 in space 20, wish to make the border crooked or tilt, make the border not stride across track, thereby make along the impedance variation of the transmission line that limits by conductor structure 16 milder with the right angle.In addition, the inner boundary of the flexible piece in qualification space 20 can be by undercutting (undercut) (shown in Fig. 2 or 2A), so that further level and smooth impedance variation along signal path.
Be used for stacked and the shaping stainless steel substrates, the Several Methods of dielectric film and conductor is known in the art.In addition, the method that is used on stainless steel substrates deposit and forming electrolyte and conductor also is known.According to most preferred embodiment of the present invention, conductive traces 22 is by coating and photoetching formation, rather than is shaped with stacked and etching, makes the track layer with conduction of insulation can be done suitably thinly, thereby the mechanical property of stainless steel flexible piece is not had big influence.After insulation and conductive structure form,, thereby make integrated flexible piece/conductor structure by the profile in etching formation flexible piece and space selectively.
Fig. 3 represents the head gimbal head unit (HGA) 30 that is fully assembled according to the present invention comprising substrate 32, to be used for HGA is fixed on the drive arm and the loading beam 34 of disk drive, is used for applying loading force on read/write head 36.36 are fixed on the far-end 18 of flexible piece/conductor structure 10, and the converters (not shown) and the conductor tracks 22 of read/write head 36 are electrically connected.Flexible piece/conductor structure 10 also can be welded on the loading beam 34 by point according to conventional.Loading beam 34 generally comprises lug boss or load button (not shown), and it approaches a contact between loading beam 34 and read/write head 36, thereby makes 36 to have limited relatively moving and rolling with respect to loading beam 35.Should illustrate that though loading beam 34 is the stainless steel structure (as flexible piece 12) of conduction, conductive traces 22 is enough far away apart from the loading beam structure in most preferred embodiment of the present invention, make can not produce big ground capacitance with respect to loading beam.But, have the loading beam structure of integrated cross pin type joint if use, then no longer need the described middle flexible body device in conjunction with Fig. 2 according to principle of the present invention, loading beam itself can be by such etching, make to comprise the space, so that reduce ground capacitance along signal path.
Fig. 4 is the relation curve of the width in ground capacitance and space 22 when flexible piece is fixed on the loading beam of ground connection.Curve 42 shows that electric capacity reduces less under the situation of the loading beam that does not have ground connection.Thereby need in loading beam itself, not make or the etching space, unless for example conductor integrates with the loading beam with whole cross pin type joint, be irrealizable with discrete flexible piece this moment.Referring to curve 40, if gap length is too little, then electric capacity is still quite high, still, if width is too big, then reaches the reentry point of minimizing, and the rigidity of structure can be influenced.Suitable gap length depends on the shape of underproof particular conductor to a great extent, but can easily be determined by simulation or experiment.Should illustrate, also can reduce ground capacitance by the thickness that increases insulation course, but this method be undesirable, because this tends to increase the thickness of final levitation device, and the material that increases can produce disadvantageous mechanical influence with relevant quality.In addition, can use narrow conductor tracks to reduce ground capacitance, but narrower conductor tracks can make the resistance of conductor increase, this is undesirable.Thereby the space of use Accurate Shaping helps to make the suspension structure of the thin integrated conductor with improved electrical property.
Fig. 5 A-5D illustrates several different void shape, and they can be adjacent to use with read signal path or write signal path, so that the electric capacity of control signal path.The space that the inner boundary that be essentially rectangle of Fig. 5 A explanation in flexible piece limits.Though shown space helps to reduce the value of ground capacitance, the square crossing of conductor and the border in space will produce the variation rapid or that be step function along the conductive path impedance.
For single conductor, the electric capacity of per unit length is represented with following formula approx:
Wherein:
C
g=ground capacitance
The 1=conductor length
ε
r=specific inductive capacity
K
c=electric capacity fringing coefficient
The b=conductor width
The t=thickness of insulating layer
Therefore, near the border near the ground capacitance of the conductor part of conductive and flexible part with near the border but very different near the ground capacitance of the conductor part in space.This rapid capacitance variations produces the impedance variation of approximate step function in conductor when conductor strides across the border.
In frequency applications, can produce the capable wave reflection that makes the transmitted waveform distortion along the impedance variation of the step function of conductor path.Therefore, as if crooked or oblique border, space for example provides high frequency performance preferably than the border shown in Fig. 5 A shown in Fig. 5 B-5D.Certainly, also can change (Fig. 2 A) as the thickness of the flexible piece of ground plate, so that make any void shape shown in Fig. 5 A-D have smoother impedance variation.The space should illustrate that the border, space can be the inner boundary or the outer boundary of flexible piece, because for example can form along the lateral edge of flexible piece.
Fig. 6 is the general reading circuit that integrated conductor type stainless steel flexible piece is used in expression, conductor, and the equivalent circuit diagram of the feature transmission line model 49 of magnetic resistance (MR) read head system.The 150kfci that the first-class effect circuit 50 of MR is routines (per inch thousand variations of flux) reading component.The conductive flexible part structure adjacent conductive track of 52 representatives of conductive traces equivalent electrical circuit and ground connection.Represent by electric capacity 53 and 54 by the forward sight backsight ground capacitance that conductive traces produces.Drive source 56 approximately scans from 10-mhz to 5-Ghz, so that analyze the transport function of the frequency drives of entire circuit.The transport function analog result of Fig. 7 and Fig. 8 indication circuit corresponds respectively to the situation that does not have the situation in space and the space is arranged in the flexible piece adjacent with track in flexible piece.In the previous case, forward sight over the ground and back apparent capacity are approximately the order of magnitude of 14pf, and for the situation that the space is arranged, forward sight over the ground and backsight capacitance of conductor can easily be reduced to about 4pf.Do not having under the situation in space, mimic channel is than use the same structure in space to have the bandwidth and the Zao decay of minimizing according to the present invention.Thereby, provide bandwidth preferably in the circuit and higher cutoff frequency according to integrated conductor flexible piece of the present invention.In addition, the effect of entire circuit is equivalent to bandpass filter, and owing to there is higher Q value in the space.Those skilled in the art should be realized that, according to principle of the present invention, dual-element converter (for example MR magnetic head) that can advanced design, make read-write elements signal path electric capacity with/or impedance by the read-write conductive traces being used different conductor geometry and space configuration, quilt is distinguished optimization.
The integrated conductor flexible piece that Fig. 9 explanation is used in disk drive.Disk drive 70 comprises the memory disc 80 of stiff baseplate 75 and rotation, and it is rotatably fixed with respect to base plate 75 by the spindle motor device (not shown) of routine.Driver 70 also comprises the drive assembly 82 of rotation, comprising voice coil loudspeaker voice coil 84, when it is selectively encouraged, is used for moving and location HGA30 (can find out in detail in conjunction with Fig. 3), thereby moves and positioning head 36 with respect to the radius of dish 80.Conductor on flexible circuit 82 and the flexible piece 10 is electrically connected, realize 36 and the signal processing circuit (not shown) in a distant place between communication.
Though promptly be used to realize the conductor flexible structure of the plating of cross pin type joint describes the present invention according to current most preferred embodiment, it should be appreciated by those skilled in the art, the present invention also can be for example be used in combination with integrated cross pin type joint loading beam structure or other conduction levitation device, wherein have with or without insulation coat directly fixing, plating, or the conductor that embeds.Thereby, should be appreciated that this explanation is not to be used for limiting the present invention.Those skilled in the art obviously can make various changes and remodeling according to the above description.Thereby appended claim is intended to be used to explain and be limited in design of the present invention interior these changes and remodeling.
Claims (22)
1 one kinds of integrated flexibility/conductor structures are used to support the read/write head near storage medium, and be used for electrically interconnecting described head and read/write circuit, and described flexibility/conductor structure comprises:
At least the conductive flexible part that is essentially planar shaped that comprises a space;
Be arranged on electric insulation layer on the described flexible piece and that be stacked and placed on described space at least in part; And
Be arranged on conductive traces on the electric insulation layer and that be stacked and placed on described space at least in part.
2 integrated flexibility/conductor structures as claimed in claim 1, wherein the impedance variation along the conductor tracks of the boundary vicinity in space is continuous basically.
3 integrated flexibility/conductor structures as claimed in claim 2, wherein the cross-sectional area in the space that is limited by the border in the upper and lower surface of flexible piece and space changes basically continuously along the length of flexible piece.
4 one kinds of integrated flexibility/conductor structures are used to support the read/write head near storage medium, and be used for electrically interconnecting described head and read/write circuit, and described flexibility/conductor structure comprises:
The conductive flexible part that is essentially planar shaped with the border that limits the space;
Near conductive traces described flexible piece setting and that be stacked and placed on described space at least in part; And
Be arranged on the electric insulation layer that is used to make flexible piece and track electric insulation between described flexible piece and the described track.
5 integrated flexibility/conductor structures as claimed in claim 4, wherein conductor tracks comprises different read-write tracks, is used for from described transmission signals.
6 integrated flexibility/conductor structures as claimed in claim 4, wherein said border is an inner boundary.
7 integrated flexibility/conductor structures as claimed in claim 4, wherein said border is an outer boundary.
8 as claim 6 or 7 described integrated flexibility/conductor structures, and wherein the impedance variation along the conductor tracks of boundary vicinity is continuous basically.
9 integrated flexibility/conductor structures as claimed in claim 4, wherein the cross-sectional area in the space that is limited by the upper and lower surface and the border of flexible piece changes basically continuously along the length of flexible piece.
10 integrated flexibility/conductor structures as claimed in claim 4, wherein flexible piece has towards described border the thickness of attenuation gradually.
11 integrated flexibility/conductor structures as claimed in claim 4, wherein inner boundary is by undercutting.
12 integrated flexibility/conductor structures as claimed in claim 4, wherein conductive traces intersects to the orthogonal projection and the described space of the conductive flexible part on plane.
13 integrated flexibility/conductor structures as claimed in claim 12, wherein flexible piece is a stainless steel.
14 integrated flexibility/conductor structures as claimed in claim 13, wherein conductive traces comprises from aluminium, the material of selecting in the group that copper and gold constitute.
15 integrated flexibility/conductor structures as claimed in claim 14, wherein insulation course is flexible polymer resin material.
16 1 kinds of stacked conductors and suspension structure are used to support the read/write head adjacent with storage medium, and described structure comprises:
Basically the loading beam of the conduction of planar shaped has the near-end of fixed drive and is used for fixing the far-end of the magnetic head fixed part that cross pin type joint is housed of magnetic head, and described loading beam comprises the border that limits the space;
Be arranged near loading beam conductive traces and that partly be stacked and placed on described space, wherein the conductive traces impedance along boundary vicinity changes basically continuously; And
Electric insulation layer is set between loading beam and the track, is used to make loading beam and track electrical isolation.
17 1 kinds of integrated conductor levitation devices are used to support the read/write head near storage medium, and be used for electrically interconnecting described head and read/write circuit, and described levitation device comprises:
Be positioned at the base plate of near-end of the fixed drive of levitation device;
The loading beam that links to each other with base plate;
That link to each other with loading beam and have the planar shaped basically on the border that limits space conductive flexible part;
Near conductive traces described flexible piece setting and that be stacked and placed on described space at least in part, wherein the conductive traces impedance along boundary vicinity changes basically continuously; And
Be arranged on the electric insulation layer that is used to make flexible piece and track electric insulation between described flexible piece and the described track.
18 1 kinds of integrated conductor Sagnetic head universal-joint head units are used for reading writing information from the storage medium of disk drive, and described Sagnetic head universal-joint head unit comprises:
Be positioned at the base plate of the nearly stiff end of Sagnetic head universal-joint head unit;
The loading beam that links to each other with base plate;
That link to each other with loading beam and have the planar shaped basically on the border that limits space conductive flexible part;
Near conductive traces described flexible piece setting and that be stacked and placed on described space at least in part, wherein the conductive traces impedance along boundary vicinity changes basically continuously;
Be arranged on the electric insulation layer that is used to make flexible piece and track electric insulation between described flexible piece and the described track; And
Be fixed on the flexible piece of far-end of Sagnetic head universal-joint head unit and and the read/write head that is electrically connected of conductive traces.
19 1 kinds of disk drives that are used to store with redisplaying information comprise:
The disk drive base;
Be rotatably installed in the memory disc on the base;
Be used to make the electric machine of disc spins;
Be used for from the read/write head of memory disc reading writing information;
Be used for the signal processing apparatus of communicating by letter with magnetic head;
Be installed in the movably driver on the base, be used for radius positioning head selectively with respect to dish; And
Be fixed on the integrated conductor levitation device on the driver, be used to support read/write head near storage medium, and be used for electrically interconnecting described head and signal processing apparatus, described levitation device comprises:
Be positioned at the base plate of near-end of the fixed drive of levitation device;
The loading beam that links to each other with base plate;
That link to each other with loading beam and have the planar shaped basically on the border that limits space conductive flexible part;
Near conductive traces described flexible piece setting and that be stacked and placed on described space at least in part, wherein the conductive traces impedance along boundary vicinity changes basically continuously;
Be arranged on the electric insulation layer that is used to make flexible piece and track electric insulation between described flexible piece and the described track; And
Wherein said magnetic head mechanically is fixed on the conductive and flexible part that is positioned at the levitation device far-end, and electrically links to each other with conductive traces, and connects signal processing apparatus by conductive traces.
20 disk drives as claimed in claim 19, wherein magnetic head comprises independent reading component and writing component, conductive traces comprises different reading track and write track, is respectively applied for to reading component and writing component and transmits signal.
21 disk drives as claimed in claim 20, wherein said borderline phase is optimized for reading track.
22 disk drives as claimed in claim 20, wherein said borderline phase is optimized for writing track.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US62143196A | 1996-03-25 | 1996-03-25 | |
| US08/621,431 | 1996-03-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1185855A true CN1185855A (en) | 1998-06-24 |
Family
ID=24490152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97190246A Pending CN1185855A (en) | 1996-03-25 | 1997-03-21 | Suspension with integrated conductor having controlled capacitance |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP0900434A1 (en) |
| JP (1) | JPH11507465A (en) |
| KR (1) | KR19990021924A (en) |
| CN (1) | CN1185855A (en) |
| AU (1) | AU2658797A (en) |
| CA (1) | CA2221966A1 (en) |
| WO (1) | WO1997036290A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101826332A (en) * | 2009-03-06 | 2010-09-08 | 日本发条株式会社 | The flexible piece of disk drives |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5883758A (en) * | 1996-08-07 | 1999-03-16 | Hutchinson Technology Incorporated | Lead structure with stainless steel base for attachment to a suspension |
| JP3756650B2 (en) | 1996-12-19 | 2006-03-15 | ハッチンソン テクノロジー インコーポレーティッド | Integrated lead suspension flexure with balanced parallel leads for insulator layer temperature and humidity compensation |
| US5982584A (en) * | 1996-12-19 | 1999-11-09 | Hutchinson Technology Incorporated | Integrated lead suspension flexure with serially arranged metal-backed and suspended insulator portions for hygrothermal compensation |
| US6147839A (en) * | 1996-12-23 | 2000-11-14 | Hutchinson Technology, Inc. | Head suspension with outriggers extending across a spring region |
| US6612016B1 (en) | 1997-12-18 | 2003-09-02 | Hutchinson Technology Incorporated | Method of making integrated lead suspension flexure with balanced parallel leads for insulator layer hygrothermal compensation |
| US5924187A (en) | 1998-01-06 | 1999-07-20 | Hutchinson Technology Incorporated | Integrated lead head suspension assembly having an etched laminated load beam and flexure with deposited conductors |
| US6596184B1 (en) | 1999-02-15 | 2003-07-22 | International Business Machines Corporation | Non-homogeneous laminate materials for suspensions with conductor support blocks |
| US6576148B1 (en) * | 1999-02-22 | 2003-06-10 | International Business Machines Corporation | Non-homogeneous laminate material for suspension with electrostatic discharge shunting |
| US6533950B1 (en) * | 1999-02-27 | 2003-03-18 | International Business Machines Corporation | Non-homogeneous laminate material for suspension with flexure motion limiter |
| US6585902B1 (en) * | 1999-02-27 | 2003-07-01 | International Business Machines Corporation | Non-homogeneous laminate material for suspension with vibration dampening |
| US7382582B1 (en) | 2000-03-21 | 2008-06-03 | Magnecomp Corporation | Reduced cross talk in wireless suspensions |
| JP4277455B2 (en) * | 2001-02-27 | 2009-06-10 | Ｔｄｋ株式会社 | Head gimbal assembly |
| US6714385B1 (en) * | 2001-04-16 | 2004-03-30 | Hutchinson Technology Inc. | Apparatus and method for controlling common mode impedance in disk drive head suspensions |
| US7986494B2 (en) * | 2007-05-04 | 2011-07-26 | Hutchinson Technology Incorporated | Integrated lead head suspension with tapered trace spacing |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4996623A (en) * | 1989-08-07 | 1991-02-26 | International Business Machines Corporation | Laminated suspension for a negative pressure slider in a data recording disk file |
| JPH0734547Y2 (en) * | 1989-12-07 | 1995-08-02 | アルプス電気株式会社 | Magnetic head support mechanism |
| EP0650156A1 (en) * | 1993-10-21 | 1995-04-26 | Seagate Technology International | Contact scheme for minimizing inductive pickup in magnetoresistive read heads |
| JP2814450B2 (en) * | 1994-03-31 | 1998-10-22 | インターナショナル・ビジネス・マシーンズ・コーポレイション | Head suspension assembly and method of manufacturing the same |
| JP3173714B2 (en) * | 1994-12-08 | 2001-06-04 | インターナショナル・ビジネス・マシーンズ・コーポレ−ション | Suspension system |
| US5608591A (en) * | 1995-06-09 | 1997-03-04 | International Business Machines Corporation | Integrated head-electronics interconnection suspension for a data recording disk drive |
-
1997
- 1997-03-21 CA CA002221966A patent/CA2221966A1/en not_active Abandoned
- 1997-03-21 AU AU26587/97A patent/AU2658797A/en not_active Abandoned
- 1997-03-21 WO PCT/US1997/005346 patent/WO1997036290A1/en not_active Application Discontinuation
- 1997-03-21 CN CN97190246A patent/CN1185855A/en active Pending
- 1997-03-21 KR KR1019970708399A patent/KR19990021924A/en not_active Application Discontinuation
- 1997-03-21 EP EP97918493A patent/EP0900434A1/en not_active Withdrawn
- 1997-03-21 JP JP9534681A patent/JPH11507465A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101826332A (en) * | 2009-03-06 | 2010-09-08 | 日本发条株式会社 | The flexible piece of disk drives |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2221966A1 (en) | 1997-10-02 |
| WO1997036290A1 (en) | 1997-10-02 |
| EP0900434A1 (en) | 1999-03-10 |
| KR19990021924A (en) | 1999-03-25 |
| JPH11507465A (en) | 1999-06-29 |
| EP0900434A4 (en) | 1999-03-10 |
| AU2658797A (en) | 1997-10-17 |
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Legal Events
| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |