CN100524469C - Microdriver, its magnetic-head folding piece combination and disk driving unit - Google Patents
Microdriver, its magnetic-head folding piece combination and disk driving unit Download PDFInfo
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- CN100524469C CN100524469C CNB2005100698461A CN200510069846A CN100524469C CN 100524469 C CN100524469 C CN 100524469C CN B2005100698461 A CNB2005100698461 A CN B2005100698461A CN 200510069846 A CN200510069846 A CN 200510069846A CN 100524469 C CN100524469 C CN 100524469C
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- magnetic head
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- microdrive
- piezoelectric element
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Abstract
A micro-actuator includes: a carriage, which consists of the base, the moving slice, the column of the base and the moving slice, and the magnetic head holding arm which extends from the both sides of the moving slice; at least one piezoelectric element which connects with the carriage; the piezoelectric element which connects with the free end and the moving slice of the piezoelectric element; the moving slice swings at the first direction or the second direction when at least one piezoelectric element is triggered. The invention is also about the combination of the magnetic head folding slice and the driving unit of the magnetic disk which are concerned with the micro-actuator.
Description
Technical field
The present invention relates to a kind of disc driver and manufacture method thereof, refer to a kind of microdrive and the manufacture method that is provided with the magnetic head fold piece combination of this microdrive especially.
Background technology
Disc driver is a kind of information-storing device that uses the thin film magnetic recording media storage data.A traditional disc driver (Disk Drive) comprises a disk and is used to drive the actuating arm of the magnetic head fold piece combination that magnetic head is housed on it.Wherein, described disk is contained on the Spindle Motor in order to drive the disk rotation.A main driving, for example voice coil motor (Voice-Coil Motor, VCM, not shown) is used for the motion of controlling and driving arm, thus control head moves to next track from a track on magnetic disk surface, and then from disk, read or write data.During work, airflow produces a kind of buoyancy that rises between magnetic disc that rotates and magnetic head, rise the bounce opposite sign but equal magnitude of buoyancy and magnetic head fold piece combination, like this, magnetic head flies on the magnetic disc surface of rotation according to predetermined flying height and keeps radially wobbling of actuating arm.
Yet, since voice coil motor (VCM) intrinsic tolerance (Tolerance), magnetic head 203 can not obtain fine position soon and accurately when the location, this will influence magnetic head accurately read and write data from disk ability.For this reason, a secondary drive (double drive) microdrive (micro-actuator) is located at magnetic head fold piece combination and is used to improve the position control performance of magnetic head.
Fig. 1 a has described the traditional magnetic head fold piece combination 277 with above-mentioned dual microdrive 205 in traditional disc driver.Compare with voice coil motor, described microdrive 205 is adjusted the location of magnetic head 203 with a less amplitude, thereby compensates the resonance tolerance of voice coil motor (VCM) and magnetic head fold piece combination.
Like this, described piezo-electric micro driver not only can make the track width become littler, and can increase by 50% the TPI value (' tracks per inch ' value) of disc driver, make disc driver have fast seek rail and orbit determination action simultaneously, and shortened seeking rail and orbit determination time of magnetic head.Like this, described microdrive 205 makes the disc information storage surface recording density of disk drive have tangible increase.
With reference to figure 1a and 1b, described microdrive 205 is provided with the ceramic frame 297 of a U-shaped.This U-shaped ceramic frame 297 comprises two ceramic arms 207, and wherein each ceramic arm 207 is provided with a piezoelectric element (not shown) in the one side.Described microdrive 205 links to each other with cantilever part 213 physics, wherein, in each ceramic arm 207 1 side, there are three to be electrically connected and to receive 209 (gold goal welding or tin ball bonding connect, gold ball bondingor solder bump bonding, GBB or SBB) microdrive 205 is connected on the cable 210 of magnetic head fold piece combination.In addition, also have four 208 (GBB or SBB) that receive of being electrically connected to be used to realize being electrically connected between magnetic head 203 and the cantilever part 213 at the trailing edge (training edge) of magnetic head.Fig. 2 has then showed the detailed process of magnetic head 203 being inserted microdrive 205.Wherein, magnetic head 203 links to each other by 2: 206 on epoxide-resin glue 212 and two the ceramic arms 207, thereby makes the motion of magnetic head 203 be independent of actuating arm 104.
When electric current puts on the piezo-electric micro driver 205 by cantilever part cable 210, thereby piezo-electric micro driver 205 expands or contraction causes 297 distortion of U-shaped ceramic frame and make the radially rotation of magnetic head 203 along disk 101.Like this, just can realize fine position (Position FineAdjustment) to magnetic head 203.
Yet (Head Gimbal Assembly, HGA) 277 (ginseng Fig. 1 c) manufacture quite difficulty to the magnetic head fold piece combination with microdrive 205.At first, magnetic head 203 is inserted microdrive 205 and is attached thereto quite difficulty.Secondly, the length of epoxide-resin glue 212 is restive, that is, the length of epoxide-resin glue 212 and highly must be controlled in suitable scope and have good working performance to guarantee magnetic head fold piece combination 277.
In addition, because microdrive 205 has increased an extra block (U-shaped ceramic frame 297), so not only influenced the static properties of cantilever part 213, and influenced its dynamic property, the performance that for example resonates (resonance performance), thus reduce the resonant frequency of cantilever part 213 and increased its gain (gain).
Simultaneously, so because 2,970 fens frangible its anti-seismic performances that cause of U-shaped ceramic frame of microdrive 205 are relatively poor.In addition, not having effective method to discern the fine fisssure of U-shaped ceramic frame 297 (micro crack) also is a problem.Moreover when applying a voltage to piezo-electric micro driver or operate as normal, frangible microdrive 205 front and back bendings may produce particulate and then influence the serviceability of microdrive 205.
In the manufacture process of magnetic head fold piece combination 277, because magnetic head fold piece combination 277 complex structures, when connecting magnetic head 203 with U-shaped ceramic frame 297, magnetic head 203 may tilt; And when connecting the U-shaped ceramic frame 297 during with cantilever 213 with magnetic head 203, U-shaped ceramic frame 297 also may tilt.Above-mentioned situation all can influence the static attitude (static attitude) of magnetic head fold piece combination 277, and then has increased the manufacture difficulty of magnetic head fold piece combination 277.
As everyone knows, polishing be one quite effectively and be widely used be used to clean magnetic head air cushion surface (airbearing surface, ABS) mode of dust pollution.Yet this cleaning mode can not be used for said head tabs combination 277, because this mode is damaged the U-shaped ceramic frame 297 of microdrive 205 easily.
At last because magnetic head 203 is supported by U-shaped ceramic frame 297, so with magnetic head 203 and cantilever 213 ground connection to obtain static discharge (Electro Static Discharge, ESD) the suitable difficulty of protection.
Therefore, provide a kind of microdrive, magnetic head fold piece combination and disc drive unit very necessary with the shortcoming that overcomes prior art.
Summary of the invention
Based on the deficiencies in the prior art, fundamental purpose of the present invention is to provide a kind of microdrive, can stop magnetic head to produce the unsuitable good head position adjustment of moving and obtain.
Another object of the present invention is to provide a kind of magnetic head fold piece combination and disc driver, it has more reliable electrical connection properties between microdrive and its cantilever part.
In order to achieve the above object, the present invention has set forth a kind of microdrive (micro-actuator), and it comprises: a carriage; Wherein said carriage comprise base portion, movable plate, the described base portion of connection and movable plate draw post and from the movable plate both sides extended magnetic head keeping arm, described base portion, movable plate, draw post and the magnetic head keeping arm is an integral structure; Be welded at least one piezoelectric element of described carriage; Described piezoelectric element connects the free end and the movable plate of described base portion; Wherein, when described at least one piezoelectric element was triggered, described movable plate was with first direction or second direction swing.In the present invention, described magnetic head keeping arm is in fact perpendicular to described movable plate.
A kind of magnetic head fold piece combination (head gimbalas sembly) comprising: magnetic head; Microdrive (micro-actuator); Wherein said microdrive comprises carriage and at least one piezoelectric element, described carriage comprise base portion, movable plate, the described base portion of connection and movable plate draw post and from the movable plate both sides extended magnetic head keeping arm, described base portion, movable plate, draw post and the magnetic head keeping arm is an integral structure; Described at least one piezoelectric element is welded on the described carriage and connects the free end and the movable plate of described base portion; When described at least one piezoelectric element was triggered, described movable plate was with first direction or second direction swing; Described each piezoelectric element has at least one piezoelectric electro contact; Support the cantilever part of described magnetic head and microdrive; Wherein corresponding described at least one piezoelectric electro contact is provided with at least one cantilever part electric contact on cantilever part; Between described cantilever part electric contact and piezoelectric electro contact, in order to set up the conducting film that electrically connects between the two; At least one conductive media that between being provided with on each cantilever part electric contact, is electrically connected wherein in order to additional conductive film and each cantilever part electric contact.According to one embodiment of the invention, described conducting film is anisotropic conductive film (anisotropic conductive film); Described conductive media is a Metal Ball.Described magnetic head keeping arm is in fact perpendicular to described movable plate.In the present invention, described head portion is connected in the movable plate or the magnetic head keeping arm of described carriage.
A kind of disc drive unit of the present invention comprises: magnetic head fold piece combination; The magnetic head fold piece combination that is connected with described magnetic head fold piece combination; Disk; And in order to the Spindle Motor of spinning disk; Wherein said magnetic head fold piece combination comprises: magnetic head; Microdrive; Wherein said microdrive comprises: wherein said microdrive comprises carriage and at least one piezoelectric element, described carriage comprise base portion, movable plate, the described base portion of connection and movable plate draw post and from the movable plate both sides extended magnetic head keeping arm, described base portion, movable plate, draw post and the magnetic head keeping arm is an integral structure; Described at least one piezoelectric element is welded on the described carriage and connects the free end and the movable plate of described base portion; When described at least one piezoelectric element was triggered, described movable plate was with first direction or second direction swing; Described each piezoelectric element has at least one piezoelectric electro contact; Support the cantilever part of described magnetic head and microdrive; Wherein corresponding described at least one piezoelectric electro contact is provided with at least one cantilever part electric contact on cantilever part; And between described cantilever part electric contact and piezoelectric electro contact, in order to set up the conducting film that electrically connects between the two; At least one conductive media that between being provided with on each cantilever part electric contact, is electrically connected wherein in order to additional conductive film and each cantilever part electric contact.
Compared with prior art, because microdrive of the present invention comprises a carriage with two magnetic head keeping arms,, described two magnetic head keeping arms stop magnetic head to produce the unsuitable more accurate head position adjustment of moving and obtain thereby can defining the position of magnetic head.In addition, the present invention is providing a conductive media with being electrically connected between additional conductive film and each cantilever electric contact on each cantilever electric contact.Described conductive media can compensate the intrinsic gap that forms on each cantilever part electric contact, thereby guarantees the electric connection between conducting film and each the cantilever electric contact.Between microdrive and magnetic head fold piece combination cantilever part, just can obtain like this to electrically connect more reliably.
In addition, because described carriage has simple structure, thereby described microdrive omitted the additional mass that has in the prior art, thus obtain good dynamically and static properties.At first, the invention provides and comprise a kind of futuramic support base that is made of metal, will improve the anti-seismic performance (shock performance) of microdrive greatly at the bottom of using metallic support, and solve the problem that traditional U-shaped ceramic frame produces dust.
In addition, in the prior art, because the complex fabrication process of its magnetic head fold piece combination, thereby be difficult to control its static attitude (static attitude), and the present invention can make the better control of static attitude of magnetic head fold piece combination by similar manufacture process or can control it with traditional method.
Moreover the present invention's control to particle contamination in manufacture process also significantly improves.In addition, traditional polishing cleaning mode also is able to use in cleaning course of the present invention.Simultaneously, because the present invention uses the ACF welding in the magnetic head installation process, thereby make that the ground connection process of magnetic head fold piece combination is easier, and the ACF welding is easy to reprocess and the recycling other materials.At last, the present invention has reduced the operating voltage of film piezoelectric micro driver and can obtain the displacement (displacement) identical with existing microdrive equally.
For making the present invention easier to understand, further set forth the specific embodiment of microdrive of the present invention, magnetic head fold piece combination and disc drive unit below in conjunction with accompanying drawing.
Description of drawings
Fig. 1 a is the stereographic map of existing magnetic head fold piece combination (HGA);
Fig. 1 b is the partial enlarged view of Fig. 1 a;
Fig. 2 has showed magnetic head has been inserted detailed process in the microdrive of magnetic head fold piece combination among Fig. 1 c (HGA);
Fig. 3 is the stereographic map of an embodiment of magnetic head fold piece combination of the present invention (HGA);
Fig. 4 is the partial enlarged view of Fig. 3;
Fig. 5 is the stereographic map of the piezoelectric unit of magnetic head fold piece combination among Fig. 3 (HGA);
Fig. 6 is the three-dimensional exploded view of Fig. 4;
Fig. 6 a and 6b have showed the connection procedure figure of the cantilever part of magnetic head fold piece combination among piezoelectric unit and Fig. 3;
Fig. 7 is the stereographic map of the carriage of an embodiment of magnetic head fold piece combination of the present invention;
Fig. 8 be among Fig. 3 magnetic head fold piece combination at the cut-open view in microdrive zone;
Fig. 9-10 has showed two kinds of different operating modes of described microdrive;
Figure 10 a has showed the electrical connection between two piezoelectric elements of microdrive shown in Figure 9, and according to one embodiment of present invention, described two piezoelectric elements have identical polarised direction;
Figure 10 b has showed the electrical connection between two piezoelectric elements of microdrive shown in Figure 9, and according to another embodiment of the invention, described two piezoelectric elements have opposite polarised direction;
Figure 10 c has showed the oscillogram that is added in shown in Figure 10 a two voltages on two piezoelectric elements respectively;
Figure 10 d has showed the oscillogram that is added in shown in Figure 10 b the voltage on two piezoelectric elements respectively;
Figure 11 is the stereographic map of carriage second embodiment of the present invention;
Figure 12 is the stereographic map of another embodiment of piezoelectric unit of the present invention;
Figure 13 is the stereographic map of an embodiment of disc drive unit of the present invention.
Embodiment
Set forth several embodiment of the present invention referring now to accompanying drawing.As mentioned above, the object of the present invention is to provide a kind of microdrive that improves structure that has, this structure can realize better head position adjustment.Microdrive after the improvement comprises a carriage that has two magnetic head keeping arms, and described two magnetic head keeping arms can prevent its unsuitable moving by positioning head, so that adjust the position of magnetic head more accurately.In addition, the present invention also provides a kind of new method that electrically connects microdrive and magnetic head fold piece combination cantilever part, and this new method will be set up a kind of electric connection more reliably between microdrive and magnetic head fold piece combination cantilever part.Set forth several specific embodiments of the present invention now.Notice that the present invention is not limited to these application.On the contrary, microdrive of the present invention can be applied on any suitable disc drive unit, regardless of the concrete structure of magnetic head fold piece combination.
With reference to accompanying drawing 3, a kind of embodiment according to the present invention, magnetic head fold piece combination 3 comprises magnetic head 31, microdrive 32 and cantilever part 8.With reference to accompanying drawing 6, microdrive 32 comprises a carriage 321 and a piezoelectric unit 322.Described piezoelectric unit 322 links together with carriage 321 parts by bonding agent or epoxy glue point 43.With reference to accompanying drawing 4, magnetic head 31 is provided with plural electric contact 204, and it is connected with carriage 321 parts by bonding agent or epoxy glue point 43, thereby magnetic head 31 can be moved with microdrive 32.
According to a kind of embodiment of the present invention, with reference to accompanying drawing 7, described carriage 321 comprises base portion 331, movable plate 334, connect base portion 331 and movable plate 334 draw post 332; And from movable plate 334 two ends extended two magnetic head keeping arms 333; And described base portion 331, movable plate 334, draw post 332 and magnetic head keeping arm 333 and be integral structure.In a specific embodiment of the present invention, the width that draws post 332 is littler than the width of movable plate 334 and base portion 331.In a specific embodiment of the present invention, magnetic head 31 is connected with movable plate 334 parts by two epoxy glue points 43, as shown in Figure 6.Selectively, magnetic head 31 also can be put 43 by epoxy glue and is connected with described magnetic head keeping arm 333 parts.Be appreciated that the quantity of epoxy glue point 43 and position are not limited to the description in accompanying drawing 6 examples, it can be adjusted according to actual needs.In the present invention, carriage 321 preferably adopts metal material to make, for example stainless steel.With reference to accompanying drawing 5, piezoelectric unit 322 comprises two independently piezoelectric elements 327, and they are connected to each other by a public insulated part (not indicating).Three electric contacts 372,373 are located at a side of piezoelectric element 327.Here, middle electric contact 373 is a ground connection electric contact of being shared by two piezoelectric elements 327, and two other electric contact 372 is used as the input electric contact.
With reference to Fig. 3, cantilever part 6 comprises load beam 17, flexible element 13, articulated part 15 and substrate 11.Load beam 17 is provided with a kick 329 (ginseng Fig. 8).Be respectively equipped with two holes (indicate) on articulated part 15 and substrate 11, one is used for riveted (swaging) magnetic head fold piece combination 3 and actuating arm (not shown), and another is used for reducing the weight of cantilever part 8.Be provided with plural electrode contacts 308 on flexible element 13, these plural number electrode contacts 308 1 ends (not shown) other end and plural cable 309,311 that link to each other with control system links to each other.With reference to accompanying drawing 6-8, described flexible element 13 also comprises a cantilever tongue piece 328, and described cantilever tongue piece 328 is used to support microdrive 32, and makes bearing capacity always put on the central area of magnetic head 31 by the kick on the load beam 17 329.With reference to accompanying drawing 5-6, electric contact 204 and the electric contact on the piezoelectric element 327 372,373 on the described cantilever tongue piece 328 corresponding magnetic heads 31 are provided with plural electric contact 312 and 49.In fact, the moving part 171 of cantilever part 8 is provided with plural electric contact 312 and is used for stube cable 309.Described electric contact 49 links to each other with cable 311.You
In the present invention, with reference to accompanying drawing 4-6, a slice anisotropic conductive film (ACF) 41 is located at and is used for electrically connecting the electric contact 372,373 of described piezoelectric element 327 and the electric contact 49 of cantilever tongue piece 328 between microdrive 32 and the cantilever tongue piece 328.Like this, between microdrive 32 and control system, set up electric connection by plural cable 311.Simultaneously, with reference to accompanying drawing 4,6 and 8, described microdrive 32 is also by cantilever tongue piece 328 physical connections of this anisotropic conductive film 41 with flexible element 13.
Between microdrive 32 and cantilever tongue piece 328, formed a parallel clearance 313 like this to guarantee steadily moving of microdrive 32.In the present invention, the height of parallel clearance 313 is preferably the 35-50 micron.In addition, plural Metal Ball 405 (gold goal welding or tin ball bonding meet GBB or SBB) is used to electrically connect the electric contact 204 of magnetic head 31 and the electric contact 312 of moving part 171, thereby by the electrical connection between plural cable 309 realization magnetic heads 31 and the control system.
Accompanying drawing 6a and 6b detail display the connection procedure of anisotropic conductive film of the present invention.Described piezoelectric electro contact 372 comprises a basalis 701 and the brace 702 that is positioned on the basalis 701.Each electric contact 49 of described cantilever tongue piece 328 comprises a basalis 704, places the brace 706 on the basalis 704 and places on the basalis 704, covers the protective seam 703 around the brace 706.Usually, when described anisotropic conductive film 41 is placed on the electric contact 49, between bonding pad 706 and described anisotropic conductive film 41, will form a gap 707.Described gap 707 may cause piezoelectric electro contact 372 to be connected interruption with electric contact 49.For avoiding the generation of above situation,
Before described anisotropic conductive film 41 places on the electric contact 49, at least one conducting block 705, for example Metal Ball is set on the bonding pad 706.When anisotropic conductive film 41 places on the electric contact 49, conducting block 705 plays an effect that connects the conductor of anisotropic conductive film 41 and bonding pad 706, and no matter whether described gap 707 exists, so just between the electric contact 49 of described piezoelectric electro contact 372 and cantilever tongue piece 328, set up one and electrically connect reliably.
In the assembling process of magnetic head fold piece combination 3, according to a specific embodiment of the present invention, with reference to accompanying drawing 6, at first, a side that piezoelectric unit 322 is connected carriage 321 forms microdrive 32; Then, described magnetic head 31 is connected the opposite side of carriage 321, and at this moment, two magnetic head keeping arms 333 of described carriage 321 firmly keep described magnetic head.After this, a slice anisotropic conductive film 41 is located on the cantilever tongue piece 328 of cantilever part 8 and is covered electric contact 49, and microdrive 32 and magnetic head 31 are installed on the cantilever tongue piece 328 by described anisotropic conductive film 41 together then.Subsequently, being electrically connected between the electric contact 312 of plural Metal Ball 405 (gold goal welding or the tin ball bonding connect) electric contact 204 that is used to realize magnetic head 31 and movable plate 171.Magnetic head fold piece combination of the present invention has so just been finished.At last, cleaning and inspection magnetic head fold piece combination.Obviously, the assembling of magnetic head fold piece combination 3 also can be carried out in such a way: at first microdrive 32 is connected on the cantilever part 8, then magnetic head 31 is installed on the microdrive 32.
Accompanying drawing 9,10,10a, 10c have showed first kind of working method of microdrive 32 realization position regulating functions.In this embodiment, two piezoelectric elements 327 have identical polarised direction, shown in accompanying drawing 10a, one end 404 of these two piezoelectric elements 321,322 is by common ground, and other end 401a is applied two voltages (shown in Figure 10 c) with two different sinusoidal waveforms 406,408 respectively with 401b.In the present invention, when the piezoelectric element 327 of microdrive 32 not being applied voltage, microdrive 32 will rest on its initial position.When the sinusoidal voltage with waveform 406,408 puts on two piezoelectric elements 327, in first half period, along with the increase of driving voltage, piezoelectric element 327 shrink gradually and simultaneously another piezoelectric element 327 expand gradually; Reduction along with driving voltage is returned to its initial position again gradually then.
In first half period, along with the increase of driving voltage, movable plate 334 will be bent to the left side by piezoelectric element 327, and along with the reduction of driving voltage, movable plate 334 is returned to its initial position again gradually then.When driving voltage enters second semiperiod (opposite with the phase place of first semiperiod), movable plate 334 will be bent to the right side by piezoelectric element 327, and along with the reduction of driving voltage, movable plate 334 is returned to its initial position again gradually then.In the present invention,, magnetic head 31 is connected on the movable plate 334, so just can realize head position adjustment function by moving around of movable plate 334 because being parts.
Fig. 9,10,10b, 10d have showed the another kind of working method of two piezoelectric elements 327 realization head positions adjustment functions.In this embodiment, described two piezoelectric elements 327 have opposite polarised direction, shown in Figure 10 b, an end 404 of these two piezoelectric elements 327 is by common ground, and other end 401a and 401b are applied the sinusoidal voltage (ginseng Figure 10 d) with same waveform 407 respectively.Under above-mentioned driven, in identical half period, a piezoelectric element 327 will shrink gradually and be returned to its initial position then again gradually, and simultaneously another piezoelectric element 327 will expand gradually and be returned to its initial position then gradually.When voltage enters down half period, piezoelectric element 327 will expand gradually be returned to its initial position again gradually then and simultaneously another piezoelectric element 327 shrink and be returned to its initial position gradually.Similarly, swing realizes a good head position adjustment thereby magnetic head about 31 circulates.In the present invention, the displacement of magnetic head 31 can change according to different input voltages.Equally, described width difference of drawing post 332 also can produce different magnetic head displacement susceptibilitys.
According to another embodiment of the invention, as shown in figure 11, carriage may have the picture carriage 321 ' another kind of structure.Two of described carriages 321 ' have from the extended magnetic head keeping arm 333 in movable plate 334 both sides '.Each magnetic head keeping arm 333 ' comprise a free-ended prolongation that surpasses movable plate 334, this prolongation is used for connecting magnetic head 31.
According to of the present invention one the step embodiment, with reference to accompanying drawing 12, the profile of piezoelectric unit also can have the picture piezoelectric unit 322 ' another kind of shape.Two piezoelectric elements 327 of this piezoelectric unit 322 ' comprise ', it is inboard to form a trapezoid-shaped openings.Obviously, according to different actual needs, described piezoelectric unit can have other suitable profiles.
In the present invention, magnetic head 31 also can be connected on the magnetic head keeping arm 333 by tackifier or epoxy glue point part.Described magnetic head keeping arm 333 is swung with movable plate 334 when piezoelectric element 327 is excited, thereby realizes the head position adjustment.
In the present invention, in view of following reason, described magnetic head 31 partly rather than fully is adhered on the described carriage 321 (movable plate 334 or magnetic head keeping arm 333): magnetic head gabarit distortion (convexity (crown) and camber (camber)) and temperature variation curve were more stable when all bonding on the carriage 321 when part was bonding.Described more stable magnetic head gabarit distortion-temperature curve means more stable flying magnetic head performance and more stable microdrive performance.Like this, just can obtain accurate head position and adjust performance.
According to one embodiment of the invention,, disk 101, Spindle Motor 102, magnetic head fold piece combination of the present invention 3, voice coil motor 107 and disc driver housing 108 assembled to form a disc drive unit with reference to Figure 13.Because the assembling process of disc driver of the present invention and structure are known by the industry those of ordinary skill, be not described in detail in this.
Claims (7)
1. a microdrive (micro-actuator) is characterized in that comprising:
A carriage; Wherein said carriage comprise base portion, movable plate, the described base portion of connection and movable plate draw post and from the movable plate both sides extended magnetic head keeping arm, described base portion, movable plate, draw post and the magnetic head keeping arm is an integral structure;
Be welded at least one piezoelectric element on the described carriage; Described piezoelectric element connects the free end and the movable plate of described base portion;
Wherein, when described at least one piezoelectric element was triggered, described movable plate was with first direction or second direction swing.
2. microdrive as claimed in claim 1 is characterized in that: described magnetic head keeping arm is in fact perpendicular to described movable plate.
3. a magnetic head fold piece combination (head gimbal assembly) comprising:
Magnetic head;
Microdrive (micro-actuator); Wherein said microdrive comprises carriage and at least one piezoelectric element, described carriage comprise base portion, movable plate, the described base portion of connection and movable plate draw post and from the movable plate both sides extended magnetic head keeping arm, described base portion, movable plate, draw post and the magnetic head keeping arm is an integral structure; Described at least one piezoelectric element is welded on the described carriage and connects the free end and the movable plate of described base portion; When described at least one piezoelectric element was triggered, described movable plate was with first direction or second direction swing; Described each piezoelectric element has at least one piezoelectric electro contact;
Support the cantilever part of described magnetic head and microdrive; Wherein on cantilever part, be provided with at least one cantilever part electric contact corresponding to described at least one piezoelectric electro contact;
Between described cantilever part electric contact and piezoelectric electro contact, in order to set up the conducting film that electrically connects between the two;
Wherein on each cantilever part electric contact, be provided with at least one conductive media, in order to be electrically connected between additional conductive film and each the cantilever part electric contact.
4. magnetic head fold piece combination as claimed in claim 3 is characterized in that: described conducting film is anisotropic conductive film (anisotropic conductive film); Described conductive media is a Metal Ball.
5. magnetic head fold piece combination as claimed in claim 3 is characterized in that: described magnetic head keeping arm is in fact perpendicular to described movable plate.
6. magnetic head fold piece combination as claimed in claim 3 is characterized in that: described head portion is connected in described carriage.
7. disc drive unit comprises:
Magnetic head fold piece combination;
The actuating arm that is connected with described magnetic head fold piece combination;
Disk; And
Spindle Motor in order to spinning disk; Wherein said magnetic head fold piece combination comprises:
Magnetic head;
Microdrive; Wherein said microdrive comprises
Wherein said microdrive comprises carriage and at least one piezoelectric element, described carriage comprise base portion, movable plate, the described base portion of connection and movable plate draw post and from the movable plate both sides extended magnetic head keeping arm, described base portion, movable plate, draw post and the magnetic head keeping arm is an integral structure; Described at least one piezoelectric element is welded on the described carriage and connects the free end and the movable plate of described base portion; When described at least one piezoelectric element was triggered, described movable plate was with first direction or second direction swing; Described each piezoelectric element has at least one piezoelectric electro contact;
Support the cantilever part of described magnetic head and microdrive; Wherein on cantilever part, be provided with at least one cantilever part electric contact corresponding to described at least one piezoelectric electro contact; And
Between described cantilever part electric contact and piezoelectric electro contact, in order to set up the conducting film that electrically connects between the two;
Wherein be provided with the conductive media that at least one is electrically connected between in order to additional conductive film and each cantilever part electric contact on each cantilever part electric contact.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100698461A CN100524469C (en) | 2005-04-28 | 2005-04-28 | Microdriver, its magnetic-head folding piece combination and disk driving unit |
| JP2006125018A JP2006309932A (en) | 2005-04-28 | 2006-04-28 | Micro actuator and head gimbal assembly and disk drive unit equipped with micro actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100698461A CN100524469C (en) | 2005-04-28 | 2005-04-28 | Microdriver, its magnetic-head folding piece combination and disk driving unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1855233A CN1855233A (en) | 2006-11-01 |
| CN100524469C true CN100524469C (en) | 2009-08-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100698461A Expired - Fee Related CN100524469C (en) | 2005-04-28 | 2005-04-28 | Microdriver, its magnetic-head folding piece combination and disk driving unit |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2006309932A (en) |
| CN (1) | CN100524469C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5560100B2 (en) * | 2010-05-31 | 2014-07-23 | 株式会社日立製作所 | Magnetic head and magnetic disk drive used for single recording system |
-
2005
- 2005-04-28 CN CNB2005100698461A patent/CN100524469C/en not_active Expired - Fee Related
-
2006
- 2006-04-28 JP JP2006125018A patent/JP2006309932A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JP2006309932A (en) | 2006-11-09 |
| CN1855233A (en) | 2006-11-01 |
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