CN1920958A - Micro-actuator and magnetic head tabs assembled for disk driver - Google Patents
Micro-actuator and magnetic head tabs assembled for disk driver Download PDFInfo
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- CN1920958A CN1920958A CN 200510096748 CN200510096748A CN1920958A CN 1920958 A CN1920958 A CN 1920958A CN 200510096748 CN200510096748 CN 200510096748 CN 200510096748 A CN200510096748 A CN 200510096748A CN 1920958 A CN1920958 A CN 1920958A
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Abstract
The invention relates to a micro driver used to combine the magnetic head bended plates, wherein it comprises metal frame with bottom support plate of suspension arm connected to the magnetic head bended plate, top support plate for supporting the magnetic head, and a couple of edge grooves connecting the bottom and top support plates. Said edge arms vertically extend from the side edges of bottom and top support plates; each side arm is mounted with piezoelectric element; each piezoelectric element has several piezoelectric parts; each piezoelectric element can be activated to selectively move the side arm.
Description
Technical field
The present invention relates to a kind of information-recording disk driver element, relate to the microdrive on a kind of magnetic head fold piece combination that is used for disc driver specifically, more specifically, the present invention relates to a kind ofly can carry out the microdrive that accurate position is adjusted read/write head position.
Background technology
A kind of common information storing device is a disc driver, and it uses magnetic media to store data, and a portable read/write head that is arranged at this magnetic media top optionally reads or write data from described magnetic media.
The consumer always wishes that the memory capacity of this class disk drive system constantly increases, and wishes that simultaneously its read-write operation speed is faster more accurate.Therefore disc drive manufacturers is devoted to develop the disk drive with higher storage capacity always, such as increasing the density of track by reducing the track width on the disk or the mode of track pitch, and then increases the memory capacity of disk indirectly.Yet, along with the increase of track density, to the also raising accordingly of position control accuracy of read/write head, so that in compact disk, realize faster more accurate read-write operation.Along with the increase of track density, use conventional art to realize more accurate read/write head being positioned track suitable on the disk difficulty more that becomes sooner.Therefore, disc drive manufacturers is sought the mode of improving the read/write head position control always, so that the benefit of utilizing ever-increasing track density to bring.
A kind of method that improves read/write head position control accuracy on compact disc that disc drive manufacturers is often used also is microdrive for adopting second driver.This microdrive cooperates common positional precision and the access speed that realizes read/write head with a master driver.The disk drive that comprises microdrive is called as Dual-drive system.
Once developed many Dual-drive systems that are used to improve access speed and the position of accurate adjustment read/write head on the track of compact disk in the past.This Dual-drive system generally includes a keynote coil motor driver and a secondary microdrive, such as piezoelectric element microdrive (being PZT element micro-actuator).This voice coil motor driver is controlled by servo-control system, and this servo-control system causes the actuating arm rotation, and this actuating arm carries read/write head and read/write head is positioned on the track specific on the storage medium.Piezoelectric element microdrive and voice coil motor driver are used common raising access speed and the accurate position of accurate adjustment read/write head on track.Like this, the position of voice coil motor driver coarse adjustment read/write head, and piezoelectric element microdrive accurate adjustment read/write head is with respect to the position of storage medium.Two drivers cooperate and can efficiently and accurately read or writing information from the high density storage medium
A kind of known being used to realizes the microdrive of read/write head fine position is included piezoelectric element.This piezoelectric element microdrive has the electronic installation that can excite the piezoelectric element on the microdrive and make it optionally shrink or expand.The piezoelectric element microdrive has such structure, makes the contraction of piezoelectric element or the motion that expansion causes microdrive, and then causes the motion of read/write head.With respect to the disc drive unit that only uses voice coil motor driver, the motion of this read/write head can realize the faster more accurate adjustment in read/write head position.The exemplary piezoelectric element microdrive of this class is exposed in many patents, the Jap.P. JP 2002-133803 that is called " microdrive and magnetic head fold piece combination " such as name, and name is called the Jap.P. JP 2002-074871 of " have the magnetic head fold piece combination of the driver of realizing fine position, comprise the disk drive of this magnetic head fold piece combination and the manufacture method of this magnetic head fold piece combination ".
Fig. 1 with Figure 2 shows that traditional disc drive unit.Disk 101 is installed on the Spindle Motor 102 and rotation under it drives.Carry magnetic head fold piece combination 100 on the voice coil motor arm 104, this magnetic head fold piece combination 100 comprises the microdrive 105 that contains magnetic head 103, and this magnetic head 103 is provided with read/write head.The motion of voice coil motor 115 control voice coil motor arms 104, and then control head 103 moves to another track from a track on disk 101 surfaces, finally can make read/write head read or write data from disk 101.When running status, comprise read/write head magnetic head 103 and the rotation disk 101 between the aerodynamic force effect produce a lift.This lift is balance mutually with the elastic force opposite sign but equal magnitude that is applied by the cantilever of magnetic head fold piece combination 100, and then causes in the process of motor arm 104 rotations, and the surface of the disk 101 of rotation forms and also keeps a predetermined flying height.
Figure 3 shows that the magnetic head fold piece combination 100 of the disk drive that contains dual drive among Fig. 1, Fig. 2.Yet because the intrinsic tolerance of voice coil motor and magnetic head cantilever combination, magnetic head 103 can't realize fast and accurate position control, and this will have influence on the performance that read/write head accurately read or write data from the disk.For this reason, provide above-mentioned piezoelectric element microdrive 105 can improve the position control accuracy of magnetic head and read/write head.More particularly, with respect to voice coil motor, piezoelectric element microdrive 105 is adjusted the displacement of magnetic head 103 with littler amplitude, so that compensate the resonance tolerance of voice coil motor and/or magnetic head cantilever combination.This piezoelectric element microdrive makes that for example using littler track pitch becomes possibility, and the track density (TPI, the track quantity that per inch is contained) of disk drive can be improved 50%, can reduce seeking rail and positioning time of magnetic head simultaneously.Therefore, piezoelectric element microdrive 105 can increase substantially the surface recording density of the information-stored disk in the disc driver.
With reference to figure 3 and Fig. 4, traditional piezoelectric element microdrive 105 comprises the U-shaped ceramic frame with two ceramic arms or limit arm 107, and each ceramic arm 107 is provided with piezoelectric element.Two ceramic arms 107 with magnetic head 103 fixings in the central and the motion by ceramic arm 107 make magnetic head 103 produce displacements.This piezoelectric element microdrive 105 is mechanically connected on the flexible element 114 of cantilever part 113.Three are electrically connected and receive 109 (gold goal welding or tin ball bonding meet gold ball bonding or solder ball bonding, GBB or SBB) are fixed on this piezoelectric element microdrive 105 on the cantilever cable 110 that is positioned at ceramic arm 107 both sides.In addition, four Metal Ball 108 (GBB or SBB) are installed to magnetic head 103 on this cantilever cable 110.
Figure 5 shows that described magnetic head 103 is installed to process on the described piezoelectric element microdrive 105.As shown in the figure, this magnetic head 103 is connected on the described two ceramic arms 107 with two precalculated positions 106 (also can with reference to figure 3) part by epoxide-resin glue 112.This connection makes the motion of magnetic head 103 depend on the motion of the ceramic arm 107 of described piezoelectric element microdrive 105.On the ceramic arm 107 of each of this piezoelectric element microdrive 105 piezoelectric element 116 is installed, so that exciting and the motion of control head 103 by piezoelectric element 116.That is, when applying voltage by cantilever cable 110, described piezoelectric element 116 expands or shrinks, and causes two ceramic arms 107 of U-shaped microdrive framework to produce distortion, thereby makes magnetic head 103 move on the track of disk, with the position of the described read/write head of accurate adjustment.In this way, can realize the controllable displacement of magnetic head 103, and then realize the head position fine setting.
Though above-mentioned piezoelectric element microdrive provides effectively and the method for reliable accurate adjustment head position, it also has certain disadvantages.More particularly, because above-mentioned design comprises the U-shaped ceramic frame, the fragility of stupalith influences its anti-seismic performance.And when vibrations or vibration took place, the fragility of stupalith can cause producing ceramic particle.Further, the extra block of microdrive can influence the static state and the dynamic property of magnetic head fold piece combination, such as resonance performance and flying magnetic head stability.In addition, the stupalith influence is made and PROCESS FOR TREATMENT.
Therefore, provide a kind of improved, microdrive of being used for magnetic head fold piece combination and hard disk drive, very necessary with the shortcoming that overcomes prior art.
Summary of the invention
An aspect of of the present present invention relates to a kind of microdrive that contains metal framework.
Another aspect of the present invention relates to a kind of microdrive that contains a plurality of piezoelectric parts.
Another aspect of the present invention relates to a kind of microdrive that is used for magnetic head fold piece combination.This microdrive comprises metal framework, this metal framework comprises the end back up pad on the cantilever that can be connected in described magnetic head fold piece combination, is used to support the top back up pad of magnetic head of described magnetic head fold piece combination and the opposite side arm that back up pad of the described end and top back up pad are connected to each other.Described limit arm vertically extends from back up pad of the described end and top back up pad side separately.On the arm of described limit piezoelectric element is installed.Each piezoelectric element comprises a plurality of piezoelectric parts.Each piezoelectric element can be excited and cause that the selectivity of described limit arm moves.
Another aspect of the present invention relates to a kind of microdrive that is used for magnetic head fold piece combination.This microdrive comprises metal framework, and this metal framework comprises an opposite side arm, plate body and plate body is connected to the plural linking arm of a described opposite side arm.On the arm of described limit piezoelectric element is installed.Each piezoelectric element comprises a plurality of piezoelectric parts.Each piezoelectric element can be excited and cause that the selectivity of described limit arm moves.
Another aspect of the present invention relates to a kind of microdrive that is used for magnetic head fold piece combination.This microdrive comprises metal framework, and this metal framework comprises an opposite side arm and is connected plate body between the described opposite side arm.On the arm of described limit piezoelectric element is installed.Each piezoelectric element comprises a plurality of piezoelectric parts.Each piezoelectric element can be excited and cause that the selectivity of described limit arm moves.
Another aspect of the present invention relates to a kind of microdrive that is used for magnetic head fold piece combination.This microdrive comprises metal framework, and this metal framework comprises plate body, be connected in the first opposite side arm of this plate body one side and be connected in the second opposite side arm of this plate body opposite side.On the arm of described limit piezoelectric element is installed.Each piezoelectric element comprises a plurality of piezoelectric parts.Each piezoelectric element can be excited and cause that the selectivity of described limit arm moves.
Of the present inventionly relate in one aspect to a kind of magnetic head fold piece combination again, this magnetic head fold piece combination comprises microdrive, magnetic head and supports the cantilever part of above-mentioned microdrive and magnetic head.Described microdrive comprises metal framework.This metal framework comprises the end back up pad on the cantilever that can be connected in described magnetic head fold piece combination, is used to support the top back up pad of magnetic head of described magnetic head fold piece combination and the opposite side arm that back up pad of the described end and top back up pad are connected to each other.On the arm of described limit piezoelectric element is installed.Each piezoelectric element comprises a plurality of piezoelectric parts.Each piezoelectric element can be excited and cause that the selectivity of described limit arm moves.
Another aspect of the present invention relates to a kind of disc driver, the Spindle Motor that it comprises magnetic head fold piece combination, is connected actuating arm, the disk on this magnetic head fold piece combination and rotates this disk.Described magnetic head fold piece combination comprises microdrive, magnetic head and supports the cantilever part of microdrive and magnetic head.Described microdrive comprises metal framework, this metal framework comprises the end back up pad on the cantilever that can be connected in described magnetic head fold piece combination, is used to support the top back up pad of magnetic head of described magnetic head fold piece combination and the opposite side arm that back up pad of the described end and top back up pad are connected to each other.On the arm of described limit piezoelectric element is installed.Each piezoelectric element comprises a plurality of piezoelectric parts.Each piezoelectric element can be excited and cause that the selectivity of described limit arm moves.
For making the present invention easier to understand, further set forth the present invention below in conjunction with accompanying drawing and be used for the microdrive of hard disk drive and the specific embodiment of magnetic head fold piece combination.
Description of drawings
Fig. 1 is the stereographic map of traditional magnetic disk driver element;
Fig. 2 is the partial perspective view of traditional magnetic disk driver element shown in Figure 1;
Fig. 3 is traditional magnetic head fold piece combination (head gimbal assembly, stereographic map HGA);
Fig. 4 is the local amplification stereogram of magnetic head fold piece combination shown in Figure 3;
Fig. 5 is the general process figure in the microdrive that magnetic head is inserted into magnetic head fold piece combination shown in Fig. 3,4;
Fig. 6 is the stereographic map of the magnetic head fold piece combination that comprises piezo-electric micro driver described in the one embodiment of the invention.
Fig. 7 is the partial perspective view of magnetic head fold piece combination shown in Figure 6.
Fig. 8 is the side view of magnetic head fold piece combination shown in Figure 7.
Fig. 9 is the cut-open view of an embodiment of the piezoelectric element of piezo-electric micro driver shown in Figure 6.
Figure 10 is the cut-open view of another embodiment of the piezoelectric element of piezo-electric micro driver shown in Figure 6.
Figure 11 is the exploded view of piezo-electric micro driver shown in Figure 6.
Figure 12 is the exploded view of magnetic head fold piece combination shown in Figure 6.
Figure 13 is the stereographic map after the magnetic head fold piece combination assembling shown in Figure 6.
Figure 14 is the magnetic head described in the another embodiment of the present invention and the exploded view of piezo-electric micro driver.
Figure 15 is the stereographic map after magnetic head shown in Figure 14 and the piezo-electric micro driver assembling.
Figure 16 is the magnetic head described in the another embodiment of the present invention and the exploded view of piezo-electric micro driver.
Figure 17 is the stereographic map after magnetic head shown in Figure 16 and the piezo-electric micro driver assembling.
Figure 18 is the exploded view of the piezo-electric micro driver described in the another embodiment of the present invention.
Figure 19 is the exploded view of the piezo-electric micro driver described among another embodiment of the present invention.
Figure 20 is the exploded view of the piezo-electric micro driver described among another embodiment of the present invention.
Figure 21 is the stereographic map after piezo-electric micro driver shown in Figure 20 is assembled.
Embodiment
With reference now to accompanying drawing, describe embodiments of the invention, the similar elements label is represented similar elements in the accompanying drawing.As mentioned above, the present invention is intended to use microdrive accurately to adjust the position of read/write head.One aspect of the present invention provides a kind of piezo-electric micro driver, so that improve the manufacturing property of static properties, resonance performance and/or the magnetic head fold piece combination of anti-seismic performance, magnetic head.By improving the manufacturing of above-mentioned performance and/or magnetic head fold piece combination, make the performance of disk drive and/or manufacturing property be improved.
Several embodiment of the microdrive that is used for magnetic head fold piece combination are described now.It should be noted that this microdrive is applicable to any disc driver with microdrive with raising performance and/or manufacturing property, and the ad hoc structure of the magnetic head fold piece combination that is not limited to show in the accompanying drawing.Be that the present invention is applicable to any suitable device that contains microdrive in any field.
The magnetic head fold piece combination that contain piezo-electric micro driver 212 (HGA) 210 of Fig. 6 to Figure 13 for describing in the first embodiment of the invention.This magnetic head fold piece combination 210 comprises piezo-electric micro driver 212, magnetic head 214 and is used to carry or the outstanding cantilever part 216 of holding above-mentioned piezo-electric micro driver 212 and magnetic head 214.
As mentioned above, this cantilever part 216 comprises substrate 218, load beam 220, articulated part 222, flexible element 224 and is positioned at inside and outside cantilever cable 226,227 on this flexible element 224.This substrate 218 comprises a mounting hole 228, is used for cantilever part 216 is connected in the actuating arm of the voice coil motor (VCM) of disk drive.The shape of this substrate 218 changes with the configuration or the model of disk drive.And this substrate 218 by relatively hard or rigidity preferably material form such as metal so that stably cantilever part 216 is fixed on the actuating arm of voice coil motor.
This articulated part 222 is by being installed to such as welding manner on substrate 218 and the load beam 220.As shown in the figure, this articulated part 222 comprises the hole 230 that the mounting hole 228 with substrate 218 aligns.In addition, this articulated part 222 also comprises the fixing bar 232 that is used to support load beam 220.
Described load beam 220 is fixed on the fixing bar 232 of articulated part 222 by the mode such as welding.Form the salient point 234 (with reference to figure 8) that cooperates with flexible element 224 on this load beam 220.The effect of this load beam 220 is equivalent to rigid body.In addition, also optionally be provided with on this load beam 220 and promote sheet 236, when disk stopped the rotation, this lifting sheet 236 was mentioned magnetic head fold piece combination 210 on disk.
This flexible element 224 is by being installed on articulated part 222 and the load beam 220 such as the mode of welding or laminating (lamination).Have on this flexible element 224 piezo-electric micro driver 212 is connected to cantilever tongue piece 238 (with reference to figure 8,12) on the cantilever 216.This cantilever tongue piece 238 matches with salient point 234 on the load beam 220.In addition, also extend a stop 221 on this load beam 220, so that the motion of the described cantilever tongue piece 238 of restriction when disc driver moves or under the situation of cantilever or disc driver experience mechanical shock or vibration.In addition, the cantilever cable 226,227 of this flexible element 224 electrically connects some contacts 240 (being connected with external control system) and magnetic head 214 and the piezoelectric element 242,243 that is positioned on the piezo-electric micro driver 212.The electric wire that described cantilever cable 226,227 can be flexible print circuit (FPC) and can have any suitable quantity.
Shown in Fig. 7,8 and 12, in being directly connected to, contact 244 on the cantilever cable 226, electrically connects so that will be somebody's turn to do the connecting terminal 246 of interior cantilever cable 226 and piezo-electric micro driver.In addition, contact 248 is directly connected on the outer cantilever cable 227, so that the connecting terminal 250 that will be somebody's turn to do on outer cantilever cable 227 and the magnetic head 214 electrically connects.
A voice coil motor is located at and is used for driving actuating arm on the described disc driver controlledly, and then controlled drive magnetic head fold piece combination 210, so that magnetic head fold piece combination 210 can place magnetic head 214 and read/write head thereof in the disc driver on any predetermined information track on the disk.Described piezo-electric micro driver 212 is used to realize accurately and fast position control of disc driver, and magnetic head is sought rail and positioning time when reducing the disk operation.Therefore, when magnetic head fold piece combination 210 was integrated in the disc driver, a Dual-drive system had just formed, and wherein said voice coil motor is realized the big position adjustment of read/write head, and the fine position that described piezo-electric micro driver 212 is realized read/write head.
Figure 11 and 12 has showed the situation that piezo-electric micro driver 212 shifts out from magnetic head 214 and cantilever 216.As shown in the figure, this piezo-electric micro driver 212 comprises microdrive framework 252 and is installed in piezoelectric element 242,243 on the microdrive framework 252.This microdrive framework 252 comprises top back up pad 254, end back up pad 256 and the limit arm 258,259 that top back up pad 254 and end back up pad 256 are coupled together.Described piezoelectric element 242,243 is installed in respectively on the limit arm 258,259 of microdrive framework 252 to form piezo-electric micro driver 212.Described microdrive framework 252 is preferably formed by metal.Yet this microdrive framework 252 also can be formed such as rigid polymeric by other suitable material.
As shown in figure 11, described limit arm 258,259 extends and forms from the two opposite sides of described top back up pad 254, end back up pad 256.As shown in the figure, form some notches between described top back up pad 254, end back up pad 256 and the corresponding limit arm 258,259.This design will allow described limit arm 258,259 that bigger freedom of motion is arranged.
Shown in Fig. 7,8,11 and 12, each piezoelectric element 242,243 comprises two piezoelectric parts 260,262.Simultaneously, form plural contact 246 on the piezoelectric element 242,243, such as two contacts, so that described piezoelectric element 242,243 and interior cantilever cable 226 are electrically connected.Described piezoelectric part 260,262 can be piezoelectric ceramics sheet or film piezo-electric sheet, and can be multilayer or single layer structure.
In one embodiment, as shown in Figure 9, described each piezoelectric part 260,262 can have bulk type (bulktype) piezoelectric ceramics structure.Among the embodiment in some other embodiment, as shown in Figure 9, described each piezoelectric part 260,262 can comprise substrate (substrate base) 270 and piezoelectric structure 272.Described substrate 270 can be made by stupalith, and described piezoelectric structure 272 can be the multi-layer piezoelectric structure.Described multi-layer piezoelectric structure comprises a plurality of electrodes 274,276, and described piezoelectric crystal (PZT crystal) then is clipped between the above-mentioned electrode.When voltage is applied on the described electrode 274,276, described piezoelectric crystal (PZT crystal) will show piezoelectric property and produce motion.In another embodiment, described piezoelectric structure can be the individual layer piezoelectric structure.In yet another embodiment, described piezoelectric part can not contain substrate (substrate base) and only comprise piezoelectric structure.
In another embodiment, as shown in figure 10, each piezoelectric part 260,262 all has the film piezo-electric sheet.As shown in the figure, each piezoelectric part 260,262 comprises double-deck piezoelectric structure 278 and substrate 280 (substratebase).Each layer of described double-deck piezoelectric structure 278 has two electrodes 282, and clamping has film piezo-electric layer 284 between these two electrodes 282.Can connect by epoxide-resin glue between described double-deck piezoelectric structure 278 two-layer.In one embodiment, described substrate (substrate base) 280 can be made of silicon or magnesium oxide material.When voltage is applied on the described electrode 282, described piezoelectric layer 284 will show piezoelectric property and produce motion.
Shown in Fig. 7,8 and 13, back up pad of the described end 256 is connected described microdrive framework 252 on the described cantilever part 216.Specifically, this end back up pad 256 is installed on the cantilever tongue piece 238 of flexible element 224 by for example epoxide-resin glue, resin or laser bonding mode part.And, be positioned at the plural piezoelectricity connecting terminal 246 on the corresponding piezoelectric element 242,243, such as two connecting terminals, receive by being electrically connected 286 (gold goal welding or tin ball bonding meet GBB or SBB) be positioned at cantilever cable 226 on corresponding connecting terminal 244 electric connections.This makes voltage to be applied on the described piezoelectric element 242,243 by interior cantilever cable 226.
Described top back up pad 254 is connected to described microdrive framework 252 on the described magnetic head 214.Specifically, an end of this magnetic head 214 is provided with plural connecting terminal 250 corresponding to the magnetic head connecting terminal 248 on the suspension board 288, such as four connecting terminals.Described top back up pad 254 support levels described magnetic head 214 thereon, and described magnetic head connecting terminal 248 is by corresponding connecting terminal 250 electric connections on receive such as being electrically connected (gold goal welding or tin ball bonding meet GBB or SBB) 290 and the described magnetic head 214.Thereby described top back up pad 254 is connected on the described magnetic head 214, and magnetic head 214 and read/write element thereof are electrically connected on the outer cantilever cable 227 of cantilever part 216.In addition, between described cantilever tongue piece 238 and described magnetic head 214, form a parallel clearance 292, make this magnetic head 214 can move freely in use, as shown in Figure 8.
In one embodiment, described magnetic head fold piece combination 210 can form like this: at first piezoelectric element 242,243 is connected on the described microdrive framework 252 on the arm of corresponding limit (as shown in figure 11), secondly described magnetic head 214 is connected on this microdrive framework 252 (as shown in figure 12), the microdrive framework 252 that at last this is contained magnetic head 214 and piezoelectric element 242,243 is connected on the described cantilever part 216 (as shown in figure 13).
Because described piezo-electric micro driver 212 comprises a metal framework 252 with piezoelectric element 242,243, makes this piezo-electric micro driver 212 have stronger anti-seismic performance.This structural volume is little, can improve the magnetic head static properties, such as resonance/flight stability.And described metal framework is incorporated on circuit one cantilever style (CIS) or circuit cantilever combined (TSA) cantilever part by the mode such as laser bonding relatively easily, and this will make the control of manufacturing more accurate.In addition, this structure makes manufacturing and PROCESS FOR TREATMENT convenient more.And described piezo-electric micro driver 212 can realize having the relatively large stroke (stroke) of high resonance performance.
The piezo-electric micro driver 312 of Figure 14,15 for describing in the another embodiment of the present invention.In this embodiment, microdrive framework 352 comprises limit arm 358,359, plate body 364 and plate body 364 is connected to the linking arm 366,368 of described limit arm 358,359.As shown in the figure, described limit arm 358,359 is cross connected on this plate body 364, thereby makes linking arm 366 be connected in the front portion of limit arm 358, and linking arm 368 is connected in the rear portion of limit arm 359.The piezoelectric element 242,243 that comprises piezoelectric part 260,262 is installed on separately the limit arm 358,359.
The piezo-electric micro driver 412 of Figure 16,17 for describing in the another embodiment of the present invention.This piezo-electric micro driver 412 is similar substantially to piezo-electric micro driver 312.Comparatively speaking, microdrive framework 452 comprises the limit arm 458,459 that is cross connected to plate body 464, thereby makes linking arm 466 be connected in the rear portion of limit arm 458, and linking arm 468 is connected in the front portion of limit arm 459.Magnetic head 214 is by being installed to its front side edge (leading sideedge) on the limit arm 458, and (trailing side edge) is installed on the another side arm 459 with its back side edge, and these magnetic head 214 parts are installed on the described microdrive framework 452.This magnetic head 214 can be by being installed on the microdrive framework 452 such as epoxide-resin glue point 494.As shown in figure 17, the work of this piezo-electric micro driver 412 and above-mentioned piezo-electric micro driver 312 is similar substantially.
The piezo-electric micro driver 512 of Figure 18 for describing in the another embodiment of the present invention.In this embodiment, piezo-electric micro driver 512 is for N shape and comprise limit arm 558,559 and be connected in plate body 564 between this limit arm 558,559.As shown in the figure, described limit arm 558,559 and plate body 564 cross connections make an end of plate body 564 be connected in the front portion of limit arm 558, and its opposite end then is connected in the rear portion of limit arm 559.The piezoelectric element 242,243 that comprises piezoelectric part 260,262 is installed on separately the limit arm 558,559.Magnetic head 214 (figure does not show) can be installed in the free end of described limit arm 558,559 correspondences.
The piezo-electric micro driver 612 of Figure 19 for describing among another embodiment of the present invention.This piezo-electric micro driver 612 is similar substantially to piezo-electric micro driver 512.Comparatively speaking, microdrive framework 652 comprises the limit arm 658,659 that is cross connected to plate body 664, thereby makes an end of plate body 664 be connected in the rear portion of limit arm 658, and its opposite end then is connected in the front portion of limit arm 659.
The piezo-electric micro driver 712 of Figure 20,21 for describing among another embodiment of the present invention.In this embodiment, piezo-electric micro driver 712 is a H shape.Specifically, described microdrive framework 752 comprises plate body 764 and a pair of limit arm that is connected in these plate body 764 each limits.Therefore, one side this plate body 764 comprise limit arm 758a, 758b, relative another side then comprises limit arm 759a, 759b.As mentioned above, piezo-electric micro driver 712 comprises four piezoelectric element 242a, 242b, 243a and 243b, is connected on four limit arm 758a, 758b, 759a and the 759b.Figure 21 is the assembly drawing of piezo-electric micro driver 712.
The magnetic head fold piece combination of describing among many embodiment of the present invention 210 that comprises piezo-electric micro driver 212,312,412,512,612 and 712 can be used in the disc driver (HDD).This disc driver can be the type of Fig. 1 description.Because structure, work and the manufacturing process of disc driver are familiar with by those of ordinary skill in this field, repeat no more here.Described piezo-electric micro driver can be applicable to anyly have the disc driver of microdrive or have in any device of microdrive.In one embodiment, this piezo-electric micro driver is used for having high-revolving disc driver.
Above invention has been described in conjunction with most preferred embodiment, but the present invention is not limited to the embodiment of above announcement, and should contain various modification, equivalent combinations of carrying out according to essence of the present invention.
Claims (38)
1. microdrive that is used for magnetic head fold piece combination comprises:
A metal framework, described metal framework comprises:
Be connected in the end back up pad on the cantilever of described magnetic head fold piece combination;
Be used to support the top back up pad of the magnetic head of described magnetic head fold piece combination; And
An opposite side arm that connects back up pad of the described end and top back up pad; Described limit arm extends out from back up pad of the described end and top back up pad lateral vertical separately; And
Be installed in the piezoelectric element on described each limit arm, each piezoelectric element comprises a plurality of piezoelectric parts, and wherein each piezoelectric element can be excited and cause that the selectivity of described limit arm moves.
2. microdrive as claimed in claim 1 is characterized in that: described each piezoelectric element comprises at least two piezoelectric parts.
3. microdrive as claimed in claim 1 is characterized in that: described each piezoelectric element is ceraminator or membrane piezoelectric element.
4. microdrive as claimed in claim 1 is characterized in that: described each piezoelectric element comprises the individual layer piezoelectric patches.
5. microdrive as claimed in claim 1 is characterized in that: described each piezoelectric element comprises the multi-layer piezoelectric sheet.
6. microdrive as claimed in claim 1 is characterized in that: described each piezoelectric part comprises substrate and piezoelectric structure.
7. microdrive as claimed in claim 6 is characterized in that: described piezoelectric structure is the multi-layer piezoelectric sheet, and this multi-layer piezoelectric sheet comprises a plurality of electrodes and is clipped in piezoelectric crystal (PZTcrystal) between described a plurality of electrode.
8. microdrive as claimed in claim 1 is characterized in that: described each piezoelectric part comprises substrate and multi-layer piezoelectric structure.
9. microdrive as claimed in claim 8 is characterized in that: each layer of described piezoelectric structure comprises two electrodes, and folder is established a film piezo-electric layer between described two electrodes.
10. microdrive that is used for magnetic head fold piece combination comprises:
A metal framework, described metal framework comprises:
One opposite side arm,
Plate body reaches
The plural linking arm that this plate body and a described opposite side arm are coupled together; And
Be installed in the piezoelectric element on each limit arm, described each piezoelectric element comprises a plurality of piezoelectric parts, and wherein each piezoelectric element can be excited and cause that the selectivity of described limit arm moves.
11. microdrive as claimed in claim 10 is characterized in that: the arm cross connection of described limit is in described plate body, thereby makes one of them linking arm be connected in the front portion of one of them limit arm, and another linking arm is connected in the rear portion of another limit arm.
12. microdrive as claimed in claim 10 is characterized in that: described each piezoelectric element comprises at least two piezoelectric parts.
13. microdrive as claimed in claim 10 is characterized in that: described each piezoelectric element is piezoelectric ceramics sheet or film piezo-electric sheet.
14. microdrive as claimed in claim 10 is characterized in that: described each piezoelectric element comprises the individual layer piezoelectric patches.
15. microdrive as claimed in claim 10 is characterized in that: described each piezoelectric element comprises the multi-layer piezoelectric sheet.
16. a microdrive that is used for magnetic head fold piece combination comprises:
A metal framework, described metal framework comprises:
One opposite side arm; And
Be connected in the plate body between the arm of described limit; And
Be installed in the piezoelectric element on described each limit arm, described each piezoelectric element comprises a plurality of piezoelectric parts, and wherein each piezoelectric element can be excited and cause that the selectivity of described limit arm moves.
17. microdrive as claimed in claim 16 is characterized in that: the arm cross connection of described limit is in described plate body, thereby makes one of them linking arm be connected in the front portion of one of them limit arm, and another linking arm is connected in the rear portion of another limit arm.
18. microdrive as claimed in claim 16 is characterized in that: described each piezoelectric element comprises at least two piezoelectric parts.
19. microdrive as claimed in claim 16 is characterized in that: described each piezoelectric element is piezoelectric ceramics sheet or film piezo-electric sheet.
20. microdrive as claimed in claim 16 is characterized in that: described each piezoelectric element comprises the individual layer piezoelectric patches.
21. microdrive as claimed in claim 16 is characterized in that: described each piezoelectric element comprises the multi-layer piezoelectric sheet.
22. a microdrive that is used for magnetic head fold piece combination comprises:
A metal framework, described metal framework comprises:
Plate body; And
Be connected in the first opposite side arm of this plate body one side and be connected in the second opposite side arm of this plate body opposite side; And
Be installed in the piezoelectric element on described each limit arm, each piezoelectric element comprises a plurality of piezoelectric parts, and wherein each piezoelectric element can be excited and cause that the selectivity of described limit arm moves.
23. microdrive as claimed in claim 22 is characterized in that: described each piezoelectric element comprises at least two piezoelectric parts.
24. microdrive as claimed in claim 22 is characterized in that: described each piezoelectric element is piezoelectric ceramics sheet or film piezo-electric sheet.
25. microdrive as claimed in claim 22 is characterized in that: described each piezoelectric element comprises the individual layer piezoelectric patches.
26. microdrive as claimed in claim 22 is characterized in that: described each piezoelectric element comprises the multi-layer piezoelectric sheet.
27. a magnetic head fold piece combination comprises:
Microdrive;
Magnetic head; And
Support the cantilever part of described microdrive and magnetic head; Wherein
This microdrive comprises:
A metal framework, described metal framework comprises:
Be connected in the end back up pad on the cantilever of described magnetic head fold piece combination;
Be used to support the top back up pad of the magnetic head of described magnetic head fold piece combination; And
The opposite side arm that back up pad of the described end and top back up pad are connected to each other,
Described limit arm vertically extends from end back up pad and top back up pad side separately; And
Be installed in the piezoelectric element on each limit arm, described each piezoelectric element comprises a plurality of piezoelectric parts, and wherein each piezoelectric element can be excited and cause that the selectivity of described limit arm moves.
28. magnetic head fold piece combination as claimed in claim 27 is characterized in that: described each piezoelectric element comprises at least two piezoelectric parts.
29. magnetic head fold piece combination as claimed in claim 27 is characterized in that: described each piezoelectric element is piezoelectric ceramics sheet or film piezo-electric sheet.
30. magnetic head fold piece combination as claimed in claim 27 is characterized in that: described each piezoelectric element comprises the individual layer piezoelectric patches.
31. magnetic head fold piece combination as claimed in claim 27 is characterized in that: described each piezoelectric element comprises the multi-layer piezoelectric sheet.
32. magnetic head fold piece combination as claimed in claim 27 is characterized in that: described each piezoelectric part comprises substrate and piezoelectric structure.
33. magnetic head fold piece combination as claimed in claim 32 is characterized in that: described piezoelectric structure is the multi-layer piezoelectric structure, and this multi-layer piezoelectric structure comprises a plurality of electrodes and is clipped in piezoelectric crystal between described a plurality of electrode.
34. magnetic head fold piece combination as claimed in claim 27 is characterized in that: described each piezoelectric part comprises substrate and multi-layer piezoelectric structure.
35. magnetic head fold piece combination as claimed in claim 34 is characterized in that: each layer of described piezoelectric structure comprises and is folded with a film piezo-electric layer between described two electrodes by two electrodes.
36. magnetic head fold piece combination as claimed in claim 27 is characterized in that: this magnetic head comprises the read-write elements that is used for magnetic recording.
37. magnetic head fold piece combination as claimed in claim 27 is characterized in that: this end back up pad is connected on the cantilever tongue piece of described cantilever part.
38. a hard disk drive comprises:
Magnetic head fold piece combination; This magnetic head fold piece combination comprises microdrive, magnetic head and supports the cantilever part of described microdrive and magnetic head;
Be connected in the actuating arm of described magnetic head fold piece combination;
Disk; And
Rotate the Spindle Motor of this disk; Wherein,
This microdrive comprises:
A metal framework, described metal framework comprises:
Be connected in the end back up pad on the cantilever of described magnetic head fold piece combination;
Be used to support the top back up pad of the magnetic head of described magnetic head fold piece combination; And
The opposite side arm that back up pad of the described end and top back up pad are connected to each other,
Described limit arm vertically extends from back up pad of the described end and top back up pad side separately; And
Be installed in the piezoelectric element on described each limit arm, described each piezoelectric element comprises a plurality of piezoelectric parts, and wherein each piezoelectric element can be excited and cause that the selectivity of described limit arm moves.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510096748 CN1920958A (en) | 2005-08-25 | 2005-08-25 | Micro-actuator and magnetic head tabs assembled for disk driver |
| JP2006227857A JP2007059048A (en) | 2005-08-25 | 2006-08-24 | Micro-actuator for disk drive apparatus, and head gimbal assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510096748 CN1920958A (en) | 2005-08-25 | 2005-08-25 | Micro-actuator and magnetic head tabs assembled for disk driver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1920958A true CN1920958A (en) | 2007-02-28 |
Family
ID=37778665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510096748 Pending CN1920958A (en) | 2005-08-25 | 2005-08-25 | Micro-actuator and magnetic head tabs assembled for disk driver |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2007059048A (en) |
| CN (1) | CN1920958A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012053109A (en) | 2010-08-31 | 2012-03-15 | Brother Ind Ltd | Image formation device |
| JP6043613B2 (en) | 2012-12-11 | 2016-12-14 | 日東電工株式会社 | Suspension board with circuit |
-
2005
- 2005-08-25 CN CN 200510096748 patent/CN1920958A/en active Pending
-
2006
- 2006-08-24 JP JP2006227857A patent/JP2007059048A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JP2007059048A (en) | 2007-03-08 |
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