CN1979641B - Magnetic-head radial-arm combination, magnetic disc driving unit with air-turbulence-proof structure and mfg. method therefor - Google Patents
Magnetic-head radial-arm combination, magnetic disc driving unit with air-turbulence-proof structure and mfg. method therefor Download PDFInfo
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- CN1979641B CN1979641B CN2005101255329A CN200510125532A CN1979641B CN 1979641 B CN1979641 B CN 1979641B CN 2005101255329 A CN2005101255329 A CN 2005101255329A CN 200510125532 A CN200510125532 A CN 200510125532A CN 1979641 B CN1979641 B CN 1979641B
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Abstract
The present invention discloses a magnetic head stack assembly, comprising: voice coil motor; E-shaped block linked with the voice coil motor and comprising at least one drive arm; at least a magnetic head gimbal assembly, where each magnetic head gimbal assembly is forged to the end of a corresponding drive arm and comprises a suspension with a flexible piece to bear the magnetic head on it; and at least one support block formed on the end of each drive arm and comprising support parts to support the tails of the flexible pieces to reduce displacements of the flexible pieces, wherein the support parts are arranged on the lateral parts of the tails of the drive arms. And the present invention also discloses a method for forming the magnetic head stack assembly and a disk driving unit comprising the magnetic head stack assembly.
Description
Technical field
The present invention relates to a kind of disc drive unit, relate to a kind of magnetic head cantilever combination (HSA that air turbulence (airturbulence) prevents structure that has specifically, head stack assembly), this air turbulence prevents that structure is used for the magnetic head fold piece combination (HGA of disc drive unit, and be used to prevent that the magnetic head on it from de-orbiting head gimbal assembly).
Background technology
Disc driver is to use magnetic media to store the information storing device of data.Figure 1 shows that the structural drawing of traditional disk drives.This disc driver comprises housing 801, is provided with one group of disk 802 in it, is coated with magnetic coating on the surface of each disk 802, so that form some concentric tracks (figure does not show).Described disk 802 is installed on the Spindle Motor 803, and this Spindle Motor 803 optionally drives above-mentioned disk 802.Be provided with actuating arm 804 in this housing 801, it is by voice coil motor (VCM, voice coil motor) 807 controls are flown above disk 802 so that drive magnetic head fold piece combination 805, and then the magnetic head 806 that is carried on the magnetic head fold piece combination 805 can be moved between disk 802 lip-deep tracks, thereby realize data are read or write from disk 802.In when work, the formation aerodynamic force contacts between the disk 802 of magnetic head 806 and rotation, and produces a lift.The mutual balance of elastic force that the cantilever by magnetic head fold piece combination 805 of this lift and opposite sign but equal magnitude applies, and then cause in the whole overall diameter stroke of above-mentioned actuating arm 804, a prearranged altitude maintains the surface of spinning disk 802.
Along with the improvement that the quick increase and the magnetic head of disc driver capacity are sought rail time and positioning time, the rotating speed RPM of disk (round per minute, revolutions per minute) is more and more faster, such as 7,200, and 10,000 and 15,000RPM.Be accompanied by this high-speed rotation of disk, cause by the rotation of disk, the air bearing face (ABS from the cantilever part of actuating arm and magnetic head fold piece combination to magnetic head, air bearing surface) air-flow becomes more and more faster, owing to the interference of the air-flow between the cantilever part of actuating arm and magnetic head fold piece combination causes bigger air turbulence, and then cause the vibration of magnetic head fold piece combination.This will force the magnetic head that is mounted thereon to de-orbit and cause the read-write mistake of disc driver.
In traditional design, because the restriction air flow structure in the actuating arm is very little and its thickness is restricted, so air-flow passes the air bearing face that the space that forms between actuating arm/cantilever part and the magnetic disk surface arrives magnetic head easily.This will cause the vibration of air turbulence and actuating arm/cantilever part.
Because the load beam of actuating arm and cantilever part is formed by rigid material, because the factor of flow perturbation, the flexible element of cantilever part more is easy to generate vibration, especially in its tail region.And because this flexible element has flexible and do not have limited supporting construction in its tail region, the vibration of this flexible element tail region is more serious, and this will influence the flight of magnetic head and cause producing air turbulence and magnetic head is de-orbited.
For addressing the above problem, United States Patent (USP) the 6th, 570, disclosed for 742B2 number lead to be provided with on the gas channel of magnetic head leading edge (leading edge) that shield assembly prevents that air-flow from causing to the vibration of actuating arm and magnetic head fold piece combination and excite (excitation).With reference to figure 2a-2b, it has explained United States Patent (USP) the 6th, 570,742B2 number detailed content, and actuating arm 78 control head tabs combination 76, and then control is flown in the magnetic head 84 of disk 101 tops.When disk 101 is rotated by Spindle Motor (not label), produce air-flow 94, it is in disk 101 surface flow and be activated arm 78 and the restriction of magnetic head fold piece combination 76.Described shield assembly comprises the finger section 112 of extending from a side (object gas flow) of the end 77 of actuating arm 78.This finger section 112 is outstanding and form channel edge from the side of above-mentioned actuating arm 78 and magnetic head fold piece combination 76, thus with air turbulence from magnetic head fold piece combination 76 diversions.Like this, turbulent region 100 is removed from magnetic head fold piece combination 76.So just avoid actuating arm 78 and magnetic head fold piece combination 76 to produce vibration and excitation, reduced the irregularity of flying magnetic head, and reduced magnetic head offset track and the wrong possibility that takes place of disc driver read-write.Yet because the restraint of actuating arm is become big, this shield assembly causes magnetic head to produce vibration to the restriction of air-flow and to the change of turbulent region easily.Easier like this magnetic head and the flexible element of causing produces vibration, and especially in the tail region of flexible element, this will produce flying magnetic head greatly influences and cause magnetic head to de-orbit.
With reference to figure 3a, it has showed the gas flow measurement data of prior art, two crests 301 between 10-14kHz showed when flying magnetic head in 7, magnetic head during the disk of 200RPM derailing displacement; Correspondingly in Fig. 3 b, two crests 302 between 10-14kHz have been showed the influence of air turbulence to the tail region generation of flexible element, and this influence will cause the displacement and the magnetic head derailing displacement of flexible element tail region.
Therefore, be necessary in fact to provide a kind of magnetic head cantilever combination that air turbulence prevents structure that has, this air turbulence prevents that structure is used for the magnetic head fold piece combination of disc drive unit and can prevents that magnetic head on it from producing the vibration that is caused by air stream turbulence and excite.
Summary of the invention
Fundamental purpose of the present invention is to provide a kind of magnetic head cantilever combination that air turbulence prevents structure that has, the combination of this magnetic head cantilever is used for the magnetic head fold piece combination of disc drive unit, and can prevent that magnetic head on it from de-orbiting owing to air turbulence and produce vibration.
Another object of the present invention is to provide a kind of formation method that air turbulence prevents the magnetic head cantilever combination of structure that has, this air turbulence prevents that structure is used for the magnetic head fold piece combination of disc drive unit, and can prevent that magnetic head on it from de-orbiting owing to air turbulence and produce vibration.
A further object of the present invention is to provide a kind of disc drive unit, it comprises having the magnetic head cantilever combination that air turbulence prevents structure, this air turbulence prevents that structure is used for the magnetic head fold piece combination of disc drive unit, and can prevent that magnetic head on it from de-orbiting owing to air turbulence and produce vibration.
For achieving the above object, a kind of magnetic head cantilever combination according to the present invention comprises: voice coil loudspeaker voice coil; The E shape piece that is connected with this voice coil loudspeaker voice coil, this E shape piece comprises at least one actuating arm; At least one magnetic head fold piece combination, wherein each magnetic head fold piece combination is by the end of forging welding to the corresponding driving arm, and described magnetic head fold piece combination comprises a cantilever part that has magnetic head carrying flexible element thereon; And at least one is formed at the back-up block on end of each described actuating arm, and this back-up block comprises the support portion of the afterbody that is used to support described flexible element, and described support zone is in the sidepiece of the end of described actuating arm, to reduce the displacement of described flexible element.This back-up block is step support portion (step support), and this step support portion comprises end face, bottom surface, the support portion of stretching out from one of end face and bottom surface at least and the forging welding hole that is used for the described magnetic head fold piece combination of forging welding.In another embodiment, this support portion comprises the stayed surface that is used to support described flexible element afterbody.
A kind of disc drive unit of the present invention comprises: one group of disk; Be used to drive the Spindle Motor of this group disk; The magnetic head cantilever combination; And be used to drive the voice coil motor of this magnetic head cantilever combination.Wherein this magnetic head cantilever combination comprises: voice coil loudspeaker voice coil; The E shape piece that is connected with this voice coil loudspeaker voice coil, this E shape piece comprises at least one actuating arm; At least one magnetic head fold piece combination, wherein each magnetic head fold piece combination is by the end of forging welding to the corresponding driving arm, and described magnetic head fold piece combination comprises a cantilever part that has magnetic head carrying flexible element thereon; And at least one is formed at the back-up block on end of each described actuating arm, and this back-up block comprises the support portion of the afterbody that is used to support described flexible element, and described support zone is in the sidepiece of the end of described actuating arm, to reduce the displacement of described flexible element.
A kind of method that forms the magnetic head cantilever combination of the present invention, it comprises step: form voice coil motor; Formation has the E shape piece of at least one actuating arm, and this E shape piece is connected to described voice coil motor; And form at least one magnetic head fold piece combination, and with the end of this magnetic head fold piece combination forging welding to the corresponding driving arm, wherein each magnetic head fold piece combination comprises a cantilever part that has magnetic head carrying flexible element thereon; Wherein form described step and comprise the step that forms at least one back-up block with E shape piece of at least one actuating arm, wherein each described back-up block is positioned on the end of described actuating arm, and described back-up block comprises that the sidepiece of the end that is positioned at described actuating arm is in order to support the support portion of described flexible element afterbody.
Compare with traditional magnetic head cantilever combination, the actuating arm of magnetic head cantilever combination of the present invention forms back-up block, and the step support portion such as having the support portion is used to support the afterbody of described flexible element, produces vibration so that prevent the afterbody of flexible element.Can prevent that like this magnetic head from producing the derailing displacement and reducing the position error signal of magnetic head.Preferably, described support portion has the supporting surface of the afterbody that supports described flexible element, rather than the strong point, therefore can make this flexible element become stable more and avoids it to produce vibration.
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 structural drawing of traditional magnetic disk driver element;
Fig. 2 a is the detailed structure view with traditional magnetic head cantilever combination of the shield assembly that forms along gas channel to the leading edge of magnetic head;
Fig. 2 b is the side view of the magnetic head fold piece combination of traditional magnetic head cantilever combination that is loaded into disk drive system, and flying magnetic head is in the disk top of rotation among the figure;
Fig. 3 a-3b has showed air-flow (windage) measurement data of magnetic head derailing displacement of the prior art and the displacement of flexible element afterbody respectively.
Fig. 4 a is the stereographic map of an embodiment of magnetic head cantilever combination of the present invention;
To be magnetic head cantilever of the present invention combination remove stereographic map after the magnetic head fold piece combination from its E shape piece to Fig. 4 b;
Fig. 5 a has showed the detailed structure of a magnetic head fold piece combination of the magnetic head cantilever combination shown in Fig. 4 a.
Fig. 5 b has showed the detailed structure of an actuating arm of the magnetic head cantilever combination shown in Fig. 4 a.
Fig. 6 a is the side view of the magnetic head cantilever combination shown in Fig. 4 a;
Fig. 6 b has showed the detailed structure of the stub area of the magnetic head cantilever combination shown in Fig. 4 a;
Fig. 7 a-7b has showed the magnetic head derailing displacement among the present invention and the gas flow measurement data of flexible element afterbody displacement respectively.
Fig. 8 has showed that the present invention contains an embodiment of the disc drive unit of the combination of magnetic head cantilever shown in Fig. 4 a.
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 aims to provide a kind of magnetic head cantilever combination (HSA that the air turbulence that is used for magnetic head fold piece combination prevents structure that has, head stack assembly), when flying magnetic head is above the disk of rotation, this structure can prevent that the magnetic head on it from producing the displacement that de-orbits, and then the position error signal of minimizing magnetic head (position error signal, PES).Specifically, the invention provides at least one back-up block, such as step supporting construction with support portion, be located at the afterbody of each flexible element that is used to support described magnetic head fold piece combination on the actuating arm of magnetic head cantilever combination, and then avoid the afterbody of described flexible element to produce because vibration and the displacement that turbulent flow (turbulent flow) causes.
Several embodiment of magnetic head cantilever combination of the present invention are described now.With reference to figure 4a-4b, make up according to the present invention, label is that 400 magnetic head cantilever combination comprises voice coil loudspeaker voice coil 401, E shape piece 402 and some magnetic head fold piece combination 500.This E shape piece 402 comprises bearing 403 and the some actuating arms 405 that is housed in the dead eye (not label).Each actuating arm 405 has the jib-length of the cantilevered distal end that extends to actuating arm 405.Each magnetic head fold piece combination 500 forging welding is in the end 408 of actuating arm 405.With reference to figure 4a-4b and Fig. 8, this voice coil loudspeaker voice coil 401 is supported and runs on back iron combination (back iron assembly, label not), thereby form voice coil motor (voicecoil motor) 107, to drive described magnetic head cantilever combination 400 and to make the fly top of the disk 101 in disc drive unit 100 of magnetic head 60 on it.Described bearing 403 is rotatably connected to magnetic head cantilever combination 400 housing 108 of disc drive unit 100.Described magnetic head 60 is supported by corresponding magnetic head fold piece combination 500 respectively with respect to the surface of disk 101, to realize read-write operation.
With reference to figure 5a, it has showed the detailed structure of an embodiment of magnetic head fold piece combination of the present invention.This magnetic head fold piece combination 500 comprises a cantilever part, and this cantilever part is made up of the substrate 501 that is assembled together mutually, load beam 503, flexible element 504 and articulated part 506.This articulated part 506 has two flexible element maintaining parts 509, in order to the afterbody 507 that supports described flexible element 504.As described magnetic head fold piece combination 500 forging welding (with reference to figure 4b) behind the end 408 of actuating arm 405, on the surface of the superimposed end 408 at actuating arm 405 of substrate 501, two then outstanding afterbodys 507 of holding described flexible element 504 of flexible element maintaining parts 509.Fig. 5 b has showed the detailed structure of the actuating arm 405 of the combination of magnetic head cantilever shown in Fig. 4 b of the present invention 400.Specifically, this actuating arm 405 has terminal 408, this end 408 has step support portion (step support, label not), this step support portion has top stage face 409a, bottom stage face 409b, is used to carry the side back up pad 412 of described flexible element 504 afterbodys 507, and is used for magnetic head fold piece combination 500 forging welding forging welding hole 411 thereon.With conventional art relatively, the end 408 of actuating arm 405 of the present invention has the step support portion, in particular for supporting the side back up pad 412 of described flexible element 504 afterbodys 507, the distal flat surfaces of this and conventional ADS driving arm has very big difference.
With reference to figure 6a-6b, it has showed the structure of the actuating arm 405 that is connected with magnetic head fold piece combination 500, wherein, substrate 501 forging welding of each magnetic head fold piece combination 500 are in the step surface 409a or the 409b of each actuating arm 405 end 408, the side back up pad 412 of each actuating arm 405 then supports the afterbody 507 of described flexible element 504, and then avoids the afterbody 507 of described flexible element 504 to produce vibration and the displacement that is caused by turbulent flow.Like this, can prevent that magnetic head 60 (with reference to figure 4a) from producing the displacement that de-orbits, and then reduce the position error signal of magnetic head.In one embodiment of the invention, shown in Fig. 6 b, described side back up pad 412 is rectangular parallelepiped and has the supporting surface that supports afterbody 507, thereby forms bigger surface of contact between this side back up pad 412 and afterbody 507.Form long-pending between this side back up pad 412 and the afterbody 507 than large contact surface.This can make the support of 412 pairs of afterbodys 507 of side back up pad become more stable than large contact surface is long-pending, and has better anti-derailing function.
Be appreciated that described side back up pad 412 is not limited to the shape shown in Fig. 5 b, any suitable shape in order to support afterbody 507 can be used to the side back up pad.In the present invention, side back up pad 412 can have a plurality of, to obtain more stable support and better anti-derailing function.
With reference to figure 7a, it has showed the gas flow measurement data of magnetic head cantilever combination 400 of the present invention, has shown magnetic head derailing displacement less relatively when flying on the disc driver of magnetic head 60 at 7200RPM at two crests 701 between the 10-14kHz; Accordingly, in Fig. 7 b, two crests 702 between 10-14kHz have shown the influence (with reference to figure 5a) of air turbulence to the afterbody 507 of flexible element 504, compare with traditional design, this air turbulence causes flexible element to produce less relatively displacement in its tail region, and less relatively magnetic head derailing displacement.Generally speaking, magnetic head cantilever of the present invention is combined in and prevents that magnetic head offset track displacement aspect has bigger improvement.
In the present invention, described E shape piece 402 can only have an actuating arm, and magnetic head cantilever combination 400 can only comprise a magnetic head fold piece combination.Be appreciated that described actuating arm 405 is not limited to the structure shown in Fig. 5 b.Any appropriate configuration with the support portion that is used to support afterbody 507 can be applied to the present invention.And described magnetic head fold piece combination also is not limited to the type shown in Fig. 5 a.The magnetic head fold piece combination of any suitable type can be used for the present invention, as long as it can be by forging welding to actuating arm.
With reference to figure 8, disc drive unit embodiment according to the present invention, disc drive unit 100 can be by fitting together housing 108, one group of disk 101, Spindle Motor 102, voice coil motor 107 and magnetic head cantilever of the present invention combination 400 mutually and obtain.Be formed for the concentric track of magnetic recording data on the surface of each disk 101.Described disk 101 is installed on the Spindle Motor 102, and this Spindle Motor 102 drives disk 101 and rotates.Because the structure and/or the assembling process of disc drive unit of the present invention are known by the personnel that this field has ordinary skill, have omitted the detailed description to this structure and assembling here.
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 (10)
1. magnetic head cantilever combination is characterized in that comprising:
Voice coil loudspeaker voice coil;
The E shape piece that is connected with this voice coil loudspeaker voice coil, this E shape piece comprises at least one actuating arm;
At least one magnetic head fold piece combination, wherein each magnetic head fold piece combination is by the end of forging welding to the corresponding driving arm, and described magnetic head fold piece combination comprises a cantilever part that has magnetic head carrying flexible element thereon; And
At least one is formed at the back-up block on the end of each described actuating arm, and this back-up block comprises the support portion of the afterbody that is used to support described flexible element, and described support zone is in the sidepiece of the end of described actuating arm, to reduce the displacement of described flexible element.
2. magnetic head cantilever combination according to claim 1, it is characterized in that: this back-up block is the step support portion, and this step support portion comprises end face, bottom surface, the support portion of stretching out from one of end face and bottom surface at least and the forging welding hole that is used for the described magnetic head fold piece combination of forging welding.
3. magnetic head cantilever combination according to claim 1, it is characterized in that: this support portion comprises the stayed surface that is used to support described flexible element afterbody.
4. disc drive unit, it comprises:
One group of disk;
Be used to drive the Spindle Motor of this group disk;
The magnetic head cantilever combination; And
Be used to drive the voice coil motor of this magnetic head cantilever combination, wherein:
This magnetic head cantilever combination comprises:
Voice coil loudspeaker voice coil;
The E shape piece that is connected with this voice coil loudspeaker voice coil, this E shape piece comprises at least one actuating arm;
At least one magnetic head fold piece combination, wherein, each described magnetic head fold piece combination is by the end of forging welding to the corresponding driving arm, and this magnetic head fold piece combination comprises a cantilever part that has magnetic head carrying flexible element thereon; And
At least one is formed at the back-up block of the end of each described actuating arm, and this back-up block comprises the support portion of the afterbody that is used to support described flexible element, and described support zone is in the sidepiece of the end of described actuating arm, to reduce the displacement of described flexible element.
5. disc drive unit according to claim 4, it is characterized in that: this back-up block is the step support portion, and this step support portion comprises end face, bottom surface, the support portion of stretching out from one of end face and bottom surface at least and the forging welding hole that is used for the described magnetic head fold piece combination of forging welding.
6. disc drive unit according to claim 4 is characterized in that: this support portion comprises the stayed surface that is used to support described flexible element afterbody.
7. a method that forms the magnetic head cantilever combination is characterized in that comprising the steps:
Form voice coil loudspeaker voice coil;
Formation has the E shape piece of at least one actuating arm, and this E shape piece is connected to described voice coil loudspeaker voice coil; And
Form at least one magnetic head fold piece combination, and with the end of this magnetic head fold piece combination forging welding to the corresponding driving arm, wherein each magnetic head fold piece combination comprises a cantilever part that has magnetic head carrying flexible element thereon;
Wherein form described step and comprise the step that forms at least one back-up block with E shape piece of at least one actuating arm, wherein each described back-up block is positioned on the end of described actuating arm, and described back-up block comprises that the sidepiece of the end that is positioned at described actuating arm is in order to support the support portion of described flexible element afterbody.
8. method according to claim 7, it is characterized in that: the step of described formation back-up block comprises the step that forms the step support portion, and this step support portion comprises end face, bottom surface, the support portion of stretching out from one of end face and bottom surface at least and the forging welding hole that is used for the described magnetic head fold piece combination of forging welding.
9. method according to claim 7 is characterized in that: the step of described formation support portion comprises the surface-supported step that is formed for supporting described flexible element afterbody.
10. method according to claim 7 is characterized in that further comprising: the step that the afterbody of described flexible element is fixed to the support portion of described back-up block.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2005101255329A CN1979641B (en) | 2005-12-09 | 2005-12-09 | Magnetic-head radial-arm combination, magnetic disc driving unit with air-turbulence-proof structure and mfg. method therefor |
| JP2006310970A JP2007164968A (en) | 2005-12-09 | 2006-11-17 | Head stack assembly, disk unit equipped with same, and its manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2005101255329A CN1979641B (en) | 2005-12-09 | 2005-12-09 | Magnetic-head radial-arm combination, magnetic disc driving unit with air-turbulence-proof structure and mfg. method therefor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1979641A CN1979641A (en) | 2007-06-13 |
| CN1979641B true CN1979641B (en) | 2011-10-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2005101255329A Expired - Fee Related CN1979641B (en) | 2005-12-09 | 2005-12-09 | Magnetic-head radial-arm combination, magnetic disc driving unit with air-turbulence-proof structure and mfg. method therefor |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2007164968A (en) |
| CN (1) | CN1979641B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010205361A (en) | 2009-03-05 | 2010-09-16 | Nitto Denko Corp | Suspension substrate with circuit and its manufacturing method |
| JP6108179B2 (en) * | 2014-09-25 | 2017-04-05 | Tdk株式会社 | Head stack assembly manufacturing equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5999372A (en) * | 1997-12-30 | 1999-12-07 | Seagate Technology, Inc. | Actuator arm with streamlined leading edge to reduce air turbulence |
| US6570742B2 (en) * | 1999-03-26 | 2003-05-27 | Seagate Technology Llc | Head actuator with head support excitation shield |
| CN1514433A (en) * | 2002-11-18 | 2004-07-21 | 日立环球储存科技荷兰有限公司 | System and method for inhibiting vibration in magnetic disk driver possessing rotary actuator |
-
2005
- 2005-12-09 CN CN2005101255329A patent/CN1979641B/en not_active Expired - Fee Related
-
2006
- 2006-11-17 JP JP2006310970A patent/JP2007164968A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5999372A (en) * | 1997-12-30 | 1999-12-07 | Seagate Technology, Inc. | Actuator arm with streamlined leading edge to reduce air turbulence |
| US6570742B2 (en) * | 1999-03-26 | 2003-05-27 | Seagate Technology Llc | Head actuator with head support excitation shield |
| CN1514433A (en) * | 2002-11-18 | 2004-07-21 | 日立环球储存科技荷兰有限公司 | System and method for inhibiting vibration in magnetic disk driver possessing rotary actuator |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2007164968A (en) | 2007-06-28 |
| CN1979641A (en) | 2007-06-13 |
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Granted publication date: 20111012 Termination date: 20131209 |