CN102270488A - Hard disk slider internally installed with actuator synthesising two-stage location with thermal high-fly control - Google Patents
Hard disk slider internally installed with actuator synthesising two-stage location with thermal high-fly control Download PDFInfo
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- CN102270488A CN102270488A CN2011101118774A CN201110111877A CN102270488A CN 102270488 A CN102270488 A CN 102270488A CN 2011101118774 A CN2011101118774 A CN 2011101118774A CN 201110111877 A CN201110111877 A CN 201110111877A CN 102270488 A CN102270488 A CN 102270488A
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- slide block
- heat radiator
- heat
- actuator
- radiator
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Abstract
The invention discloses a hard disk slider internally installed with an actuator synthesising a two-stage location with a thermal high-fly control, comprising two actuators symmetrically disposed on a protective layer under a read head by taking the head as a centre, wherein the actuator mainly comprises a heater and a radiator. The heater is started to generate two drive forces with reverse directions on the head in a take-off direction to perform a two-stage location and generate two drive forces with the same direction in a direction perpendicular to a disk to perform a high-flying control. Additionally, because the radiator conducts the heat generated by the heater to a magnetic recording media via an air bearing, the response frequency of a micro-driver based on a thermal expansion mechanism in the invention can be greatly increased, and the difficulty of performing a write operation on a high-coercivity media under a micro field intensity can be reduced.
Description
Technical field
The invention belongs to technical field of computer, be specifically related to a kind of built-in secondary location and fly the high hard disk slide block of controlling synthetic actuator with heat.
Background technology
The rapid expansion in numeral universe make need the canned data amount will from 2006 1.6 * 10
20Bit is increased to 5.3 * 10 of the year two thousand twenty
22Bit.In order to satisfy this surprising storage increased requirement, as the topmost non-volatile memory device that current extensive storage is used, hard disk drive maintaining sustained and rapid growth on memory capacity is very important.The recording density of current hard disk product has reached about 500Gb/in
2, and estimate still to keep annual 30%～50% growth rate, yet the storage industry thinks that if adopt traditional its density limit of recording method be 1Tb/in
2The basic reason that this limit produces is the super paramagnetic effect that the recording medium particle causes when constantly diminishing.For addressing this problem, must improve the coercive force of magnetic storage medium, and how under little field conditions, the high-coercive force medium to be carried out the focus that write operation becomes current research.
Because the raising of storage density, the road of disk is wide to have arrived sub-micrometer scale with bit wide.Voice coil motor closed loop servo mode is generally adopted in the one-level location of magnetic head, and this mode is very difficult to the positioning control of sub-micrometer scale magnetic track.Therefore, on the basis of one-level location, various forms of secondary positional actuator have appearred in succession.Divide according to the mechanism that drives, the microdrive that is currently available for the secondary location can be divided into piezoelectric ceramics, static and three kinds of forms of thermal expansion.Wherein, piezoelectric ceramics needs high driving voltage, and the static driven assembling is complicated, and the thermal expansion response frequency is lower.Current academia and industrial community are mainly carried out the driving of secondary location in research and use piezoelectric ceramics.
In addition, along with developing rapidly of material preparation science and microelectric technique, hard disc of computer track location mechanism constantly develops to miniaturization.Magnetic head is from initial 4mm * 3mm * 0.8mm, and heavy 55mg develops into current 0.85mm * 0.70mm * 0.23mm, heavy 0.6mg---reduced about 90 times.Under the so little situation of area of bed, the manufacturing of secondary positional actuator and installation all are difficult.
Be accompanied by the raising of magnetic recording density, it is also more and more lower that magnetic head flies height---and the work flying height of current magnetic head has been reduced to less than 10nm.In order to reach so low flying height, the current heat that has generally adopted Denier plum (D.W.Meyer) to propose in 1999 in slide block flies high control slide block, and number of patent application is US 5991113.Microheater is adopted in this design, and promptly a kind of size is little, power input height and the well heater that can accurately control.Driving magnetic head flight height by energising generation thermal deformation in microheater further reduces.
Summary of the invention
The objective of the invention is to propose a kind of built-in secondary location and fly the high hard disk slide block of controlling synthetic actuator, can realize simultaneously that accurate secondary location and heat fly high control, reduce under the downfield field intensity high-coercive force medium to be carried out the difficulty of write operation with heat.
Built-in secondary location flies the high hard disk slide block of controlling synthetic actuator with heat; comprise the slide block substrate; the slide block substrate is provided with air-bearing surface near the surface of driver disc; the slide block substrate side is provided with the slide block pad; be provided with utmost point top protective seam in the slide block pad successively; protective seam and read head lower protective layer on the read head; be provided with read head between protective seam and the lower protective layer on the read head; be wound with on the protective seam of utmost point top and write coil; it is characterized in that; the lower protective layer below is that the center is arranged with two actuators with the read head; described actuator comprises well heater; three heat radiator and insulation course; clamping having heaters between first and second heat radiator wherein; first and second heat radiator connect the 3rd heat radiator together, the unilateral ingress of air bearing of the 3rd heat radiation, and the first and second heat radiator outsides are with insulation course.
Described heat radiator and the 3rd heat radiator are held spacing.
Technique effect of the present invention is embodied in:
In on two microheaters that are positioned over the magnetic head both sides on the direction that leaving the right or normal track logical simultaneously on during electric current, in two microheaters, can produce corresponding heat, and then produce thermal expansion.Because two microheaters are placed on the both sides of magnetic head, on the direction that leaves the right or normal track, magnetic head is produced two rightabout driving forces (secondary location), on vertical disc sheet direction, magnetic head is produced two driving forces (flying high control) in the same way.By adjusting the electric current of two microheaters, produce different driving forces, finally reach the displacement on displacement and the vertical disc sheet direction on the needed direction that leaves the right or normal track, to realize the secondary location simultaneously and to fly high control.Simultaneously, around two microheaters, be enclosed with heat radiator, the direct ingress of air bearing of a face of these heat radiator.Because very big at the atmospheric pressure at air bearing place, and because slide block this moment flying height herein is lower, these heats can the level and smooth relatively air bearing of passing through be transmitted on the magnetic disk media.Owing to will make storage density break through 1Tb/in
2, must adopt the higher magnetic disk media of coercive force.The heat that more than is transmitted on the magnetic disk media can be used for pre-thermal medium, though deficiency is so that medium is broken through Curie point, but can assist correlation technique (as the HAMR (Heat Assisted Magnetic Recording) technology, the microwave-assisted magnetic recording media) coercive force of instantaneous to a certain extent reduction medium is to reduce under little field intensity the high-coercive force medium to be carried out the difficulty of write operation.
Further, the present invention adopts two microheaters, and microheater can adopt the heat of now generally having been used to fly the design of high controller.Each microheater is surrounded by a heating radiator.Each heating radiator is made up of three heat radiator, and wherein two heat radiator are clipped in the middle microheater, and two heat radiator of the 3rd heat radiator and this link to each other, and contact with air bearing.Two heat radiator at first are transmitted to the 3rd heat radiator with the heat of microheater, and the 3rd heat radiator then conducts heat on the magnetic disk media by air bearing.For carrying out heat management, around two heat radiator, surround five continuous insulation courses, be easier to the gathering of heat like this and distribute, can avoid influencing simultaneously the precision that magnetic head is read and write.Because the pressure of air bearing is very big, heat can be transferred on the disc from magnetic head smoothly.The use of heating radiator can improve the response frequency of the microdrive based on thermal expansion mechanism of the present invention greatly.
This structure can make magnetic head fly high control and secondary location simultaneously in the reading and writing data process, also can be reduced in the difficulty of under little field intensity the high-coercive force medium being carried out write operation relatively.And, be easy to make and install because it just installs two microheaters and heating radiator additional on the basis of original slide block structure.
Description of drawings
Fig. 1 is the one-piece construction synoptic diagram of slide block;
Fig. 2 flies the partial sectional view of high control slide block for heat;
Fig. 3 is the partial structurtes synoptic diagram of synthetic actuator slide;
Fig. 4 is the partial bottom view of synthetic actuator slide;
Fig. 5 is microheater structural representation in the synthetic actuator.
Embodiment
Be described in further detail below in conjunction with accompanying drawing and example structure the synthetic actuator slide among the present invention.
Fig. 1 is the one-piece construction figure of existing slide block, and Fig. 2 is that the existing heat that contains flies high controller slide block partial sectional view, and Fig. 3 is the slide block partial structurtes synoptic diagram that has comprised synthetic actuator in the embodiment of the invention.Wherein, bigger cube is the slide block substrate among Fig. 1, and its lower surface is an air-bearing surface, and the less cube in side is the slide block pad, and magnetic head and actuator all are embedded in pad inside.Last protective seam and lower protective layer are clipped in the middle reading head among Fig. 2, and write head is the coil that spiral twines, and the small circle among the figure is the cross section of helix, flies high controller for heat under the lower protective layer of reading head.In Fig. 2, perpendicular to figure inwardly (or outwards) be the direction of leaving current track (abbreviation leave the right or normal track direction), upwards (or downwards) is the direction tangent with current track, (or to the right) is vertical disc sheet direction left.
Fig. 2 is compared and combine Fig. 4 and Fig. 5 as can be seen with Fig. 3, and primary clustering of the present invention and actuator are installed under the reading head lower protective layer, on the direction that leaves the right or normal track about the read/write head symmetry.
Fig. 3 is the concrete structure of synthetic actuator in the embodiment of the invention, and heating radiator is made up of three heat radiator among the figure, and two parallel heat radiator on orbital direction are clipped in the middle microheater, and the relative heat radiator of the size of microheater is little.In addition, the cavity between these two heat radiator is an air, is used to isolate microheater and the 3rd heat radiator.Insulation course has surrounded heating radiator and microheater.As seen from Figure 3, microheater does not contact with the heat radiator of the heating radiator rightmost side, She Ji benefit is after switching on to microheater like this, heat can obtain gathering to a certain degree, make the zone around heating radiator and insulation course and the insulation course produce sufficient deformation in various degree, and then produce enough drive force magnetic heads and carry out the secondary location and fly high control.Because the parcel of insulation course is arranged, heat accumulation is in microheater and heating radiator, conducting heat in the air bearing in the heating radiator with the contacted heat radiator of air bearing, because the high and thick degree of pressure of air bearing is about tens nanometers, so can be level and smooth heat further be transmitted on the disk media, improved the response frequency of the microdrive based on thermal expansion mechanism of the present invention.In addition, these heats can carry out preheating to medium, to reduce under low field intensity the high-coercive force medium to be carried out the difficulty of write operation.
Fig. 4 is the air-bearing surface partial schematic diagram of synthetic actuator slide.Two bigger rectangles in the figure Intermediate gasket are the face of the heat radiator that contacts with air-bearing surface in the heating radiator.Strip in the middle of the protective seam of utmost point top and circle are for writing coil, and wherein the circle of with dashed lines drafting is the initiating terminal interface of writing coil, and the strip that with dashed lines is drawn is the side of writing coil.Clip read head between last protective seam and the lower protective layer.
Fig. 5 is a microheater structural representation in the synthetic actuator.Two microheaters are about the line of symmetry symmetry of magnetic head among the figure.Microheater can adopt the existing structural design that generally flies high controller.In addition, adopted two heating radiators to surround two microheaters, heating radiator is made up of three heat radiator, the heat radiator parallel with microheater is that second heat radiator of heating radiator is (because first heat radiator overlaps with second heat radiator on direction as shown among the figure, so do not make a check mark), the heat radiator parallel with air-bearing surface is the 3rd heat radiator of heating radiator.When adding corresponding electric current in first microheater, microheater produces thermal deformation, thereby on vertical disc sheet direction read head is produced driving force towards disc, and produces the power towards second microheater on the direction that leaves the right or normal track.In like manner, when in second microheater, adding corresponding electric current, thereby on vertical disc sheet direction, read head is produced driving force towards disc, and on the direction that leaves the right or normal track, produce power towards first microheater.As can be seen, on the direction that leaves the right or normal track, these two driving force directions are opposite; On vertical disc sheet direction, these two driving force directions are identical.By two microheaters are added corresponding electric current, the displacement on the displacement on the direction that can realize leaving the right or normal track accordingly and the vertical disc sheet direction, thus realize the secondary location simultaneously and fly high control.Simultaneously, owing to adopted heating radiator that heat is transferred on the medium by air bearing, can improve response frequency of synthesizing actuator and the difficulty that reduces under the downfield field intensity, the high-coercive force medium to be carried out write operation from well heater.
The above is preferred embodiment of the present invention, but the present invention should not be confined to the disclosed content of this embodiment and accompanying drawing.So everyly do not break away from the equivalence of finishing under the spirit disclosed in this invention or revise, all fall into the scope of protection of the invention.
Claims (2)
1. built-in secondary location flies the high hard disk slide block of controlling synthetic actuator with heat; comprise the slide block substrate; the slide block substrate is provided with air-bearing surface near the surface of driver disc; the slide block substrate side is provided with the slide block pad; be provided with utmost point top protective seam in the slide block pad successively; protective seam and read head lower protective layer on the read head; be provided with read head between protective seam and the lower protective layer on the read head; be wound with on the protective seam of top and write coil; it is characterized in that; the lower protective layer below is that the center is arranged with two actuators with the read head; described actuator comprises well heater; three heat radiator and insulation course; clamping well heater between first and second heat radiator wherein; first and second heat radiator connect the 3rd heat radiator together, the unilateral ingress of air bearing of the 3rd heat radiation, and the first and second heat radiator outsides are with insulation course.
2. hard disk slide block according to claim 1 is characterized in that, described heat radiator and the 3rd heat radiator are held spacing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110111877 CN102270488B (en) | 2011-05-02 | 2011-05-02 | Hard disk slider internally installed with actuator synthesising two-stage location with thermal high-fly control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110111877 CN102270488B (en) | 2011-05-02 | 2011-05-02 | Hard disk slider internally installed with actuator synthesising two-stage location with thermal high-fly control |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102270488A true CN102270488A (en) | 2011-12-07 |
| CN102270488B CN102270488B (en) | 2013-11-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110111877 Expired - Fee Related CN102270488B (en) | 2011-05-02 | 2011-05-02 | Hard disk slider internally installed with actuator synthesising two-stage location with thermal high-fly control |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5991113A (en) * | 1997-04-07 | 1999-11-23 | Seagate Technology, Inc. | Slider with temperature responsive transducer positioning |
| CN1581297A (en) * | 2003-08-01 | 2005-02-16 | 日立环球储存科技日本有限公司 | Magnetic head slider and magnet disk apparatus |
| WO2010066515A1 (en) * | 2008-12-12 | 2010-06-17 | Asml Netherlands B.V. | Actuator system, lithographic apparatus, method of controlling the position of a component and device manufacturing method |
-
2011
- 2011-05-02 CN CN 201110111877 patent/CN102270488B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5991113A (en) * | 1997-04-07 | 1999-11-23 | Seagate Technology, Inc. | Slider with temperature responsive transducer positioning |
| CN1581297A (en) * | 2003-08-01 | 2005-02-16 | 日立环球储存科技日本有限公司 | Magnetic head slider and magnet disk apparatus |
| WO2010066515A1 (en) * | 2008-12-12 | 2010-06-17 | Asml Netherlands B.V. | Actuator system, lithographic apparatus, method of controlling the position of a component and device manufacturing method |
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| Publication number | Publication date |
|---|---|
| CN102270488B (en) | 2013-11-06 |
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