CN100592390C - Magnetic-head folded-piece combination and magnetic disc driving unit containing same - Google Patents
Magnetic-head folded-piece combination and magnetic disc driving unit containing same Download PDFInfo
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- CN100592390C CN100592390C CN200510129222A CN200510129222A CN100592390C CN 100592390 C CN100592390 C CN 100592390C CN 200510129222 A CN200510129222 A CN 200510129222A CN 200510129222 A CN200510129222 A CN 200510129222A CN 100592390 C CN100592390 C CN 100592390C
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- magnetic head
- flexible element
- salient point
- microdrive
- piece combination
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Abstract
The invention is a magnetic head gimbal assembly, comprising: magnetic head; microdriver with two film piezoelectric pieces, which define a notch; suspension to bear the magnetic head and the microdriver, where the suspension comprises: flexible piece with driver bearing part and magnetic head bearing part to partially hold the magnetic head, where the driver bearing part has a slot correspondingto the notch of the microdriver; and load beam with first and second salient points, where the first salient point supports the flexible piece in a corresponding position to the central region of themagnetic head and the second salient point runs through the slot on the flexible piece and the notch of the microdriver and extends to the end of the front edge of the magnetic head and a gap forms between the magnetic head and the salient point. And the invention discloses a disk driving unit comprising the improved magnetic head gimbal assembly.
Description
Technical field
The present invention relates to a kind of disc drive unit, relate more specifically to a kind of magnetic head fold piece combination with structure of the microdrive that is mounted thereon of protection (head gimbal assembly, HGA).
Background technology
Disc drive unit is by placing magnetic read/write head on the magnetic media of rotation, such as on the disk and data are deposited in or read.With reference to figure 1a-1b, existing typical disc driver comprises actuating arm 105 and disk 106.This actuating arm 105 is used to drive magnetic head fold piece combination 104.On this magnetic head fold piece combination 104 magnetic head 202 is installed.This disk 106 is installed on the Spindle Motor 103, so that rotated by its driving.A voice coil motor (voice coil motor, VCM) motion of 102 controlling and driving arms 105, and then driving magnetic head fold piece combination 104, thereby make magnetic head 202 between disk 106 lip-deep tracks, move, and then realize data being write disk 106 or from disk 106, reading with read-write sensor.
Yet owing to the intrinsic tolerance of the voice coil motor 102 in the displacement that is present in magnetic head 202, magnetic head 202 can't obtain the adjustment of accurate position.
For addressing the above problem, piezo-electric micro driver is used to adjust the displacement of magnetic head.That is, piezo-electric micro driver is corrected the displacement of magnetic head 202 with littler amplitude, with the tolerance of compensation voice coil motor and the manufacturing tolerance of actuating arm inner assembly.Can obtain littler track record width like this, and the TPI value (tracks per inch) of disc drive unit can be increased by 50% (having increased surface recording density simultaneously).
With reference to figure 2a-2b, traditional magnetic head fold piece combination 200 comprises cantilever part 208, has read/write transducers (figure does not show) and is installed in the magnetic head 202 of above-mentioned cantilever part 208 ends and is installed in the microdrive 204 that is used to finely tune magnetic head 202 displacements on the cantilever part 208.This cantilever part 208 has substrate 219, flexible element 206, load beam 215 and the articulated part 213 that fits together mutually.With reference to figure 2a-2c, this flexible element 206 comprises flexible element main body 261, magnetic head holding board 212 and is used to support the lead holding board 213 of this flexible element main body 261.This flexible element 206 comprises and is used for the partly magnetic head supporting part 211 of fixing magnetic head 202, thereby makes the front terminal part 272 of this magnetic head 202 be exposed to described microdrive 204.Have salient point 218 on this load beam 215, it is at the position upper support described flexible element 206 corresponding with the central area of magnetic head 202.Yet, when vibrations or vibration take place in magnetic head fold piece combination 200 or the disc driver that contains this magnetic head fold piece combination 200, this magnetic head 202 will be rotation center 204 rotations along direction 220 towards microdrive with this salient point 218, thereby the leading edge terminal part of this magnetic head 202 272 produces the trend of bump microdrive 204 end faces, so that damage microdrive 204.
With reference to figure 2b, this microdrive 204 electrically connects by line connected mode (wire-bonding method) and flexible element 206.Yet described line connected mode is easy to generate line and connects projection (bump), and these lines connect projection will produce harmful effect to the electric connection between microdrive 204 and the flexible element 206.In addition, this line connected mode operating difficulties and cost are higher.In addition, owing to there is not the reference for installation structure, microdrive accurately is assembled on the cantilever part of magnetic head fold piece combination relatively difficulty.
Therefore be necessary to provide a kind of magnetic head fold piece combination and disc drive unit, to overcome the deficiencies in the prior art.
Summary of the invention
An aspect of of the present present invention provides a kind of and prevents magnetic head and be installed on magnetic head fold piece combination and the disc drive unit that the interior microdrive of magnetic head fold piece combination collides and can improve anti-seismic performance.
Another aspect of the present invention provides a kind of magnetic head fold piece combination and disc drive unit that reduces the manufacturing cost of magnetic head fold piece combination and can improve the reliability of electrical connection of magnetic head fold piece combination.
Another aspect of the present invention provides a kind of magnetic head fold piece combination and disc drive unit that improves the assembly precision of magnetic head fold piece combination.
For achieving the above object, a kind of magnetic head fold piece combination of the present invention comprises magnetic head, have the microdrive of two film piezo-electric sheets and be used to carry the cantilever part of said head and microdrive.Wherein these two film piezo-electric sheets define a notch; Described cantilever part comprises: have the flexible element of the magnetic head supporting part of driver supporting part and part fixing said head, have the slit corresponding with the notch of above-mentioned microdrive on this driver supporting part; And contain the load beam of first salient point and second salient point, wherein this first salient point is supporting flexible element with corresponding position, the central area of magnetic head, this second salient point passes slit on the above-mentioned flexible element and the notch on the microdrive and extends to the leading edge terminal part of magnetic head, and forms the gap between this magnetic head and this second salient point.
In one embodiment of the invention, the width in the gap that forms between the described magnetic head and second salient point is 20 μ m-60 μ m.This second salient point has the soft top that is used for absorbing vibration or vibration.
In another embodiment of the present invention, on position corresponding on the notch of this microdrive, be provided with driver reference for installation hole with described second salient point, on position corresponding on the slit of this flexible element, be provided with flexible element reference for installation hole with described second salient point, when microdrive, flexible element and load beam are fitted together, this second salient point passes above-mentioned flexible element reference for installation hole and driver reference for installation hole successively, thereby guarantees high assembly precision.
In one embodiment of the invention, this film piezo-electric sheet is installed on the described flexible element by anisotropic conductive film.Wherein said each film piezo-electric sheet comprises conductive layer, insulation course and is clipped in piezoelectric layer between this conductive layer and the insulation course, and described microdrive is installed on the flexible element, and its conductor planes is to this flexible element.
A kind of disc drive unit of the present invention comprises: magnetic head fold piece combination, the actuating arm that is connected with this magnetic head fold piece combination, disk reach in order to rotate the Spindle Motor of this disk.Wherein said magnetic head fold piece combination comprises: magnetic head; Microdrive with two film piezo-electric sheets, these two film piezo-electric sheets define a notch; Be used to carry the cantilever part of said head and microdrive; Wherein said cantilever part comprises: have the flexible element of the magnetic head supporting part of driver supporting part and part fixing said head, have the slit corresponding with the notch of above-mentioned microdrive on this driver supporting part; And contain the load beam of first salient point and second salient point, wherein this first salient point is supporting flexible element with corresponding position, the central area of magnetic head, this second salient point passes slit on the above-mentioned flexible element and the notch on the microdrive and extends to the leading edge terminal part of magnetic head, and forms the gap between this magnetic head and this second salient point.
In the present invention, owing to have second salient point on the load beam, with respect to microdrive; the more close magnetic head of this second salient point, and as preventing that magnetic head from producing motion, such as the restraint device that rotatablely moves; therefore can avoid magnetic head that microdrive is produced collision, so that protect this microdrive.In addition,, make magnetic head fold piece combination and the anti-seismic performance that contains the disc drive unit of this magnetic head fold piece combination be improved because additional salient point can limit the inappropriate motion of magnetic head.In addition, magnetic head fold piece combination of the present invention is by anisotropic conductive film, rather than the line connection method is with microdrive 304 physics and be electrically connected on the flexible element 306, thereby obtains good connection reliability, and avoided the projection problem of line connection method.And the anisotropic conductive film connection method is cheap method of attachment and processing ease.At last, because the film piezo-electric sheet of microdrive has the insulation course towards magnetic head, therefore when vibrations or vibration generation, impact even magnetic head produces microdrive, this piezoelectric layer still can be protected, and avoids being damaged.
By following description also in conjunction with the accompanying drawings, it is more clear that the present invention will become, and these accompanying drawings are used to explain embodiments of the invention.
Description of drawings
Fig. 1 a is the stereographic map of traditional magnetic disk driver element.
The partial view that Fig. 1 b amplifies for Fig. 1 a.
Fig. 2 a is the stereographic map of existing magnetic head fold piece combination.
Fig. 2 b is the sectional perspective exploded view of magnetic head fold piece combination shown in Fig. 2 a.
Fig. 2 c is the cut-open view of magnetic head fold piece combination shown in Fig. 2 a.
Fig. 3 a for an embodiment of magnetic head fold piece combination of the present invention stereographic map.
Fig. 3 b is the cut-open view of magnetic head fold piece combination shown in Fig. 3 a.
Fig. 4 a is the three-dimensional exploded view of magnetic head fold piece combination shown in Fig. 3 a.
Fig. 4 b is the vertical view after magnetic head fold piece combination shown in Fig. 3 a is removed magnetic head.
Fig. 4 c has showed the structure of the film piezo-electric sheet of the annexation of the flexible element of magnetic head fold piece combination shown in microdrive and Fig. 3 a and this microdrive.
Fig. 4 d is the exploded view of Fig. 3 c.
Fig. 5 a is the stereographic map of magnetic head fold piece combination in accordance with another embodiment of the present invention.
Fig. 5 b is the vertical view after magnetic head fold piece combination shown in Fig. 5 a is removed magnetic head.
Fig. 6 for an embodiment of disc drive unit of the present invention stereographic map.
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 invention provides a kind of magnetic head fold piece combination with microdrive protection structure; when the disc drive unit with this magnetic head fold piece combination was given a shock or vibrates, this protection structure can be protected microdrive, and for example film piezoelectric micro driver is avoided damaging.Specifically, the present invention provides additional salient point on the load beam of the cantilever part of magnetic head fold piece combination, this salient point passes the flexible element of cantilever part and microdrive and extends towards the leading edge terminal part of the magnetic head of magnetic head fold piece combination, and forms the gap between this magnetic head and second salient point.In the present invention, this flexible element also has the magnetic head supporting part that is used for part fixing magnetic head, makes the leading edge terminal part of magnetic head be exposed to microdrive like this.This load beam is included in first salient point that supports flexible element corresponding to the position of the central area of magnetic head.When vibrations or vibration take place in this magnetic head fold piece combination or the disc drive unit that contains this magnetic head fold piece combination, this magnetic head will be the rotation center rotation with this first salient point, and make the leading edge terminal part of magnetic head produce end face that collides microdrive and the trend of damaging microdrive.Be appreciated that with respect to microdrive, the more close magnetic head of this second salient point, and,, therefore can avoid magnetic head that microdrive is produced collision, so that protect this microdrive such as the restraint device that rotatablely moves as preventing that magnetic head from producing motion.In addition, because this extra salient point can limit the inappropriate motion of magnetic head, so magnetic head fold piece combination and the anti-seismic performance that contains the disc drive unit of this magnetic head fold piece combination are improved.
Some embodiment of magnetic head fold piece combination of the present invention are described now.With reference to figure 3a, 4a, magnetic head fold piece combination 300 according to an embodiment of the invention comprises magnetic head 302, microdrive 304 and is used to carry the cantilever part 308 of said head 302 and microdrive 304.This magnetic head 302 is included in read/write transducers (figure does not show) and the some magnetic head connecting terminals 352 that is positioned at its trailing edge that is embedded in the manufacture process thereon.This cantilever part 308 comprises substrate 319, articulated part 313, flexible element 306 and the load beam 315 that is assembled together mutually.In addition, have some cables 309 on this flexible element 306, these cable 309 1 ends and microdrive 304 electrically connect, and the other end and some electric contacts 311 electrically connect.In the present invention, these electric contacts 311 and a control system (figure does not show) are connected, so that make the control signal of this control system generation be input in the microdrive 304 and be used to control microdrive 304 by these electric contacts 311.In addition, these cables 309 electrically connect with said head 302, make described magnetic head 302 to be controlled by above-mentioned control system by above-mentioned electric contact 311.
With reference to figure 4a, this flexible element 306 comprises flexible element main body 361, magnetic head holding board 362 and lead holding board 363.This flexible element 306 has driver supporting part 412 and is positioned at the magnetic head supporting part 411 that flexible element 306 1 ends are used for local fixing magnetic head 302, and this driver supporting part 412 zone therebetween forms slit 415.Have some electric contacts 408 near these driver supporting part 412 places on this flexible element 306.Simultaneously, have the electric contact 471 corresponding on this flexible element 306 with the electrical connection contact 352 of magnetic head 302.In one embodiment of the invention, this magnetic head holding board 362 and lead holding board 363 are installed in the back of flexible element main body 361, in order to support the rigidity of this flexible element main body 361 and raising flexible element 306.In another embodiment of the present invention, this magnetic head holding board 362 and lead holding board 363 can form by this flexible element 306 of local etching in the manufacture process of flexible element 306.
With reference to figure 4a, this microdrive 304 comprises two piezoelectric patches 304a and 304b, and wherein each piezoelectric patches has three-decker, i.e. conductive layer 402, insulation course 404 and be held on piezoelectric layer 403 between this conductive layer 402 and the insulation course 404.Described two piezoelectric patches 304a and 304b only are connected to each other at the one end, thereby between forms notch 341, these piezoelectric patches 304a and the 304b electric contact 408 corresponding electric contacts 406 on its same-side formation and flexible element 306.In the present invention, this notch 341 forms corresponding to the slit on the flexible element 306 415.
With reference to figure 4a, this load beam 315 comprises two limiters 317 that extend out from the both sides of one end, is used to limit the overbend of flexible element 306 with respect to this load beam 315.In addition, with reference to figure 3b, 4a-4b, this load beam 315 has first salient point 318, with at the position upper support above-mentioned flexible element 306 corresponding with the central area of magnetic head 302, thereby make that load force can be applied to the central area of magnetic head 302 by this first salient point 318 when magnetic head 302 flies in disk (scheming not show) surperficial.Especially, this load beam 315 also comprises another one or second second salient point 303 near first salient point 318.After magnetic head fold piece combination 300 assembled, this second salient point 303 passed the slit 415 and 341 backs of the notch on the microdrive 304 of flexible element 306 and extends to the leading edge terminal part 321 of this magnetic head 302, and forms gap 500 between the magnetic head 302 and second salient point 303.This gap 500 guarantees that this second salient point 303 does not influence magnetic head 302 in the magnetic disk surface flying quality of (figure does not show).In addition, this gap 500 has the effect of cushion space, when magnetic head 302 because of exterior vibration or vibration during to microdrive 304 rotations, the impact of 302 pairs second salient points 303 of magnetic head can be slowed down in this gap 500.In one embodiment of the invention, these gap 500 length are that 20 μ m are to 60 μ m.
In one embodiment of the invention, this second salient point 303 has and is used for the soft top (not label) of absorbing vibration or vibration.In the present invention, this second salient point 303 can have anyly makes it can pass the slit 415 on the flexible element 306 and the suitable shape of the notch 341 on the microdrive 304, such as cheese or nail shape, and can be by any suitable flexible material, form such as condensate, so that obtain good pooling feature.
In the present invention, with reference to figure 4a, 4c and 4d, this microdrive 304 is to be assembled to like this on the above-mentioned flexible element 306: at first (anisotropic conductive film, ACF) sheet 502 is placed on the flexible element 306, and covers the electric contact 408 of this flexible element 306 with anisotropic conductive film.Then this microdrive 304 is placed on this flexible element 306, and the electric contact 406 of this microdrive 304 is alignd with the electric contact 408 of flexible element 306, the notch 341 with microdrive 304 aligns with the slit 415 of flexible element 306 simultaneously.Described like this anisotropic conductive film sheet 502 just is sandwiched between above-mentioned microdrive 304 and the flexible element 306, thereby with this microdrive 304 and flexible element 306 physical connections.In addition, the electric contact 408 of this flexible element 306 electrically connects by the electric contact 406 of above-mentioned anisotropic conductive film sheet 502 with this microdrive 304, thereby this microdrive 304 and this flexible element 306 are electrically connected.Different with traditional line method of attachment, magnetic head fold piece combination of the present invention use the anisotropic conductive film sheet with microdrive with flexible element physics and electrically connect, thereby obtain good connection reliability and eliminate the projection problem of line connection method generation.And this anisotropic conductive film connection method is cheap method of attachment and processing ease.
Particularly, with reference to figure 4c-4d, each piezoelectric patches 304a and 304b have one towards flexible element 306 and with the conductive layer 402 of its electric connection.Like this, the insulation course 404 of above-mentioned piezoelectric patches can be towards magnetic head 302 (with reference to figure 4a), thereby even make do not having on the magnetic head fold piece combination 300 under the situation of second salient point 303, this piezoelectric layer 403 still can be avoided destroying.That is, when vibrations or vibration generation, magnetic head rotates towards this microdrive 304, but only collides the surface (insulation course 404) of piezoelectric patches 304a and/or 304b, and can not destroy piezoelectric layer 403.This bump to microdrive 304 does not almost influence the physics and the electrology characteristic of microdrive 304.
In the present invention, with reference to figure 3a-3b, 4a, this magnetic head 302 is by such as cementing agent or epoxide-resin glue and part is installed on the magnetic head supporting part 411 of flexible element 306.(gold goal connects the number of metal ball or the tin ball connects, gold ball bonding or solder ball bonding, GBB or SBB, figure does not show) electric contact 471 of flexible element 306 and the magnetic head connecting terminal 352 of magnetic head 302 are electrically connected, thus this magnetic head 302 is connected to above-mentioned control system by aforementioned cable 309.According to one embodiment of present invention, with reference to figure 3a, above-mentioned load beam 315, flexible element 306, substrate 319 and articulated part 313 by traditional assembly method for example laser bonding assemble up and form cantilever part 308.Afterwards magnetic head 302 and microdrive 304 are installed on this cantilever part 308 and form magnetic head fold piece combination 300.
In the present invention, this second salient point 303 is higher than the end face of above-mentioned microdrive 304, but be lower than the bottom surface of magnetic head 302, therefore cause magnetic head 302 when microdrive 304 rotates when shaking or vibrating, this second salient point 303 can prevent magnetic head 302 collision microdrives 304, avoids microdrive 304 to be damaged like this.
Fig. 5 a-5b has explained the described magnetic head fold piece combination 300 ' of another embodiment of the present invention.This magnetic head fold piece combination 300 ' is similar with magnetic head fold piece combination 300, and just some is different for microdrive and flexible element.Promptly, this magnetic head fold piece combination 300 ' comprises the microdrive of being made up of two film piezo-electric sheet 304 ' a and 304 ' b 304 ', each piezoelectric patches side within it forms semicircle orifice (not label), zone line at the notch 341 of microdrive 304 ' forms circular horizon hole 503 like this, and this circular horizon hole 503 is corresponding with second salient point 303 on the load beam 315.And this magnetic head fold piece combination 300 ' comprises the flexible element of being made up of flexible element main body 361 ', magnetic head holding board 362 and lead holding board 363 306 '.Form circular horizon hole 504 on the slit 415 of this flexible element 306 ', this hole is corresponding with above-mentioned second salient point 303 and annular datum hole 503.When assembling above-mentioned microdrive, flexible element and load beam, this second salient point 303 can pass above-mentioned circular horizon hole 503,504 successively, thereby makes this magnetic head fold piece combination 300 ' obtain higher assembly precision.
Be appreciated that magnetic head fold piece combination of the present invention is not limited to the described structure of the foregoing description, any magnetic head fold piece combination with suitable flexible element and load beam all can be applied to the present invention.
Fig. 6 is the exemplary disc drive unit that contains magnetic head fold piece combination of the present invention.According to one embodiment of present invention, a disc drive unit 900 comprises housing 901, disk 906, Spindle Motor 903, flexible print circuit 907, voice coil motor 902, actuating arm 905 and magnetic head fold piece combination of the present invention 300.This magnetic head fold piece combination 300 has microdrive protection structure, and this structure can improve the anti-seismic performance of disc drive unit 900 simultaneously.Because the structure of disc drive unit and/or use the assembling procedure of magnetic head fold piece combination of the present invention to be familiar with by the industry those of ordinary skill is omitted more detailed structure here and is assembled description.Be appreciated that disc drive unit can comprise other magnetic head fold piece combination that makes up according to the present invention.
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 (12)
1. magnetic head fold piece combination, it comprises:
Magnetic head;
Microdrive with two film piezo-electric sheets, these two film piezo-electric sheets define a notch;
Be used to carry the cantilever part of said head and microdrive, wherein this cantilever part comprises:
Flexible element with magnetic head supporting part of driver supporting part and part fixing said head has the slit corresponding with the notch of above-mentioned microdrive on this driver supporting part; And
The load beam that contains first salient point and second salient point, wherein this first salient point is supporting flexible element with corresponding position, the central area of magnetic head, this second salient point passes slit on the above-mentioned flexible element and the notch on the microdrive and extends to the leading edge terminal part of magnetic head, and forms the gap between this magnetic head and this second salient point.
2. magnetic head fold piece combination according to claim 1 is characterized in that: the width in the gap that forms between the described magnetic head and second salient point is 20 μ m-60 μ m.
3. magnetic head fold piece combination according to claim 1 is characterized in that: this second salient point has the soft top that is used for absorbing vibration or vibration.
4. magnetic head fold piece combination according to claim 1, it is characterized in that: on position corresponding on the notch of this microdrive, be provided with driver reference for installation hole with described second salient point, on position corresponding on the slit of this flexible element, be provided with flexible element reference for installation hole with described second salient point, when microdrive, flexible element and load beam are fitted together, this second salient point passes above-mentioned flexible element reference for installation hole and driver reference for installation hole successively, thereby guarantees high assembly precision.
5. magnetic head fold piece combination according to claim 1 is characterized in that: this film piezo-electric sheet is installed on the described flexible element by anisotropic conductive film.
6. magnetic head fold piece combination according to claim 1, it is characterized in that: each described film piezo-electric sheet comprises conductive layer, insulation course and is clipped in piezoelectric layer between this conductive layer and the insulation course, described microdrive is installed on the flexible element, and its conductor planes is to this flexible element.
7. disc drive unit comprises:
Magnetic head fold piece combination;
The actuating arm that is connected with this magnetic head fold piece combination;
Disk; And
In order to rotate the Spindle Motor of this disk; Wherein said magnetic head fold piece combination comprises:
Magnetic head;
Microdrive with two film piezo-electric sheets, these two film piezo-electric sheets define a notch;
Be used to carry the cantilever part of said head and microdrive; Wherein said cantilever part comprises:
Flexible element with magnetic head supporting part of driver supporting part and part fixing said head has the slit corresponding with the notch of above-mentioned microdrive on this driver supporting part; And
The load beam that contains first salient point and second salient point, wherein this first salient point is supporting flexible element with corresponding position, the central area of magnetic head, this second salient point passes slit on the above-mentioned flexible element and the notch on the microdrive and extends to the leading edge terminal part of magnetic head, and forms the gap between this magnetic head and this second salient point.
8. disc drive unit according to claim 7 is characterized in that: the width in the gap that forms between the described magnetic head and second salient point is 20 μ m-60 μ m.
9. disc drive unit according to claim 7 is characterized in that: this second salient point has the soft top that is used for absorbing vibration or vibration.
10. disc drive unit according to claim 7, it is characterized in that: on position corresponding on the notch of this microdrive, be provided with driver reference for installation hole with described second salient point, on position corresponding on the slit of this flexible element, be provided with flexible element reference for installation hole with described second salient point, when microdrive, flexible element and load beam are fitted together, this second salient point passes above-mentioned flexible element reference for installation hole and driver reference for installation hole successively, thereby guarantees high assembly precision.
11. disc drive unit according to claim 7 is characterized in that: described film piezo-electric sheet is installed on the flexible element by anisotropic conductive film.
12. disc drive unit according to claim 7, it is characterized in that: each film piezo-electric sheet comprises conductive layer, insulation course and is clipped in piezoelectric layer between described conductive layer and the insulation course, described microdrive is installed on the flexible element, and its conductor planes is to this flexible element.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200510129222A CN100592390C (en) | 2005-11-29 | 2005-11-29 | Magnetic-head folded-piece combination and magnetic disc driving unit containing same |
| JP2006320589A JP2007149330A (en) | 2005-11-29 | 2006-11-28 | Head gimbal assembly and disk drive unit including the head gimbal assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200510129222A CN100592390C (en) | 2005-11-29 | 2005-11-29 | Magnetic-head folded-piece combination and magnetic disc driving unit containing same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1979642A CN1979642A (en) | 2007-06-13 |
| CN100592390C true CN100592390C (en) | 2010-02-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200510129222A Expired - Fee Related CN100592390C (en) | 2005-11-29 | 2005-11-29 | Magnetic-head folded-piece combination and magnetic disc driving unit containing same |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2007149330A (en) |
| CN (1) | CN100592390C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102024459B (en) * | 2009-09-23 | 2014-09-24 | 新科实业有限公司 | Cantilever part with short flexible member tail, head gimbal assembly and disk drive unit |
| CN102456356B (en) * | 2010-10-26 | 2015-09-30 | 新科实业有限公司 | Magnetoresistive transducer, magnetic head, magnetic head fold piece combination and hard disk drive |
-
2005
- 2005-11-29 CN CN200510129222A patent/CN100592390C/en not_active Expired - Fee Related
-
2006
- 2006-11-28 JP JP2006320589A patent/JP2007149330A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CN1979642A (en) | 2007-06-13 |
| JP2007149330A (en) | 2007-06-14 |
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