CN102280112B - Thermal flying-height control slider for hard disk drive - Google Patents
Thermal flying-height control slider for hard disk drive Download PDFInfo
- Publication number
- CN102280112B CN102280112B CN 201110092396 CN201110092396A CN102280112B CN 102280112 B CN102280112 B CN 102280112B CN 201110092396 CN201110092396 CN 201110092396 CN 201110092396 A CN201110092396 A CN 201110092396A CN 102280112 B CN102280112 B CN 102280112B
- Authority
- CN
- China
- Prior art keywords
- slide block
- read
- hard disk
- protective seam
- magnetic head
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The invention provides a thermal flying-height control slider for a hard disk drive. In the thermal flying-height control slider, according to a principle that the read-write magnetic head area of the slider can be subjected to thermal expansion so as to further reduce flying height by electrifying a write coil in a magnetic head write process, a microheater is additionally arranged at a selected middle position of a read-write magnetic head on the hard disk slider, and a unique and efficient W-shaped microheater structure is designed. By means of the structure, the magnetic reading head can obviously move downwards in a read operation process, the flying height of the hard disk magnetic head in the read operation process is decreased, and the precision and the efficiency of data read are increased.
Description
Technical field
The invention belongs to technical field of computer, be specifically related to a kind of heat and fly the high slide block of controlling, use this module effectively to reduce the flying height of magnetic head in hard disc data read operation process, be beneficial to improve the storage density of hard disk.
Background technology
In hard disk drive, along with the pursuit of people to mass data storage, in relatively limited disc area, by reducing the information bit area of record data, thereby the memory capacity that significantly promotes hard disk just seems extremely important.But the fact based on such, during the magnetic force of the data bit on being recorded in hard disk more than not reaching to a certain degree, inductive head just can't be read information bit.Therefore, must reduce the flying height of hard disc magnetic head when the information bit area is very little, and then improve the magnetic coupling between magnetic head and information bit, so that accurately carry out reading and writing data.It is effective measures that improve hard-disc storage density that hard disc magnetic head flies high reduction, but meanwhile, it has also brought possible cephalic disc collision, and this is also to hinder to fly one of high immediate cause further reduced.
Simultaneously, no matter be technique, or, stability, magnetic head all must reduce accordingly, realizes lightweight, miniaturization.In order to guarantee that so little read-write head energy stable operation is on the disc sheet surface, in fact read-write head is to be embedded into a slide block that relative size is larger by the semiconductor technology manufacturing technology.
Air bearing surface by the design slide block can be controlled slide block with suitable flying height, reaches the requirement accurately read and write data.Along with the development of seagate, very large change has all occurred in the profile of air bearing slider and size, and within 1975, standard mini slide block is of a size of 4 * 3.2 * 0.86mm, and the air-bearing surface shape is also very simple.State-of-the art femtometre (femto) slide block to invention in 2003 is of a size of 0.85 * 0.70 * 0.23mm, and the air-bearing surface shape is very complicated.Under the condition of disc high-speed cruising, slide block is by the support of suspension module, and the acting force made progress produced according to aerodynamic principle supports with stable operation on the disc sheet surface.Current use femto slide block, the flying height of magnetic head is reduced to below 10nm.For further reducing the flying height of magnetic head, therefore on flying height, there is the factor of nanoscale impact also to have to take in as thermal expansion.
All adopted in existing hard disk drive and read and write discrete dual-magnetic head structure, its read-write principle is fully different.In the write operation process of magnetic head, write heat that coil electricity produces and the heat of surrounding environment and can cause the thermal expansion of read-write head, and then have influence on the distance between read-write head and disc in head disk interface.And read operation is by the magnetoresistance reading out data, do not need additionally to power up, can not cause the thermal expansion of magnetic head.Due in the write operation process, write coil and cause thermal expansion and make write head that downward displacement be arranged, consider this displacement, just must maintain the allowance of an abundance to avoid occurring the collision of head disk interface in the write operation process in the flying magnetic head process.The flying height that the maintaining of allowance makes head-slider is than the low flight Gao Yaogao that can reach, thereby having had a strong impact on hard disc magnetic head carries out precision and the efficiency that data are read, and then makes the memory capacity of using traditional disk slide block can't further improve hard disk.
Therefore, for addressing this problem, D.W.Meyer proposed heat and has flown the high slide block of controlling in 1999, and number of patent application is U.S.Patent 5 991 113.This design adopts microheater, and a kind of size is little, and power input is high and can carry out the well heater of accurately controlling.Yet, existing heat flies the full symmetric structure that the high microheater of controlling in slide block structure has adopted unified live width type mostly, the thermal deformation that it produces its region also is uniformly distributed around, the thermal deformation vertically downward along disc surface is not only arranged, the thermal deformation vertically upward along disc surface is also arranged.The positive impact that thermal deformation upwards not only can not improve readwrite performance and memory capacity, can cause the unstable of read-write head on the contrary, affects the raising of readwrite performance and memory capacity.Under this background, the present invention proposes a kind of novel heat and flies the high slide block of controlling to address this problem and further to reduce the flying height of head-slider.
Summary of the invention
The object of the present invention is to provide a kind of heat for hard disk drive to fly the high slide block structure of controlling, by reduce thermal deformation upwards in magnetic head reading out data process, increase downward thermal deformation, make in the data read procedure hard disc magnetic head flight at alap height, improved efficiency and memory capacity that stability, readwrite performance, the data of read-write head read.
A kind of heat for hard disk drive flies the high slide block of controlling; 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 successively protective seam and read head lower protective layer on top protective seam, read head in the slide block pad; be provided with read head between protective seam and lower protective layer on read head, on the protective seam of top, be wound with and write coil, on top protective seam and read head, between protective seam, lay microheater.
Described microheater comprises the W mold base and is wound around coil thereon, the close described air-bearing surface in the tip of W mold base.
Described be wrapped in loop density on the W mold base from the openend of W type toward most advanced and sophisticated direction ascending variation.
The center protrusion of described W mold base is partly level and smooth circular arc and lower than the both sides height.
Technique effect of the present invention is embodied in:
During certain electric current, can produce corresponding heat in well heater, and then produce thermal expansion logical in coil on being wound in microheater, make magnetic head produce certain displacement to the disc direction, reduce the flying height of magnetic head.
Further, the present invention adopts W type well heater, because other position of winding wire density ratio of V-shape jut is large, thereby produce more heat, make downward displacement larger, the circular arc zone of two V-shape centres is smoother, the line density less, the heat produced is relatively also few, thereby the displacement made progress is less.The relation that applies the size of electric current and displacement can effective observing and controlling by accurate experimental data, thereby can be by writing closed line loop current in process in data, apply the mode of electric current in the data read procedure, make hard disc magnetic head flight in the data read procedure at alap height, improve speed and efficiency that data read.
This structure can make magnetic head also can alaply approach disc in the data read procedure, thereby can realize sooner that tracking is looked for more accurately, improves the stability of hard disc magnetic head operation, improves the efficiency of the read data of hard disc magnetic head.And, because it has just increased an auxiliary equipment on the basis of original slide block structure, be easy to manufacture and install.
The accompanying drawing explanation
The one-piece construction schematic diagram that Fig. 1 is slide block;
Fig. 2 is not for the slide block partial structurtes schematic diagram of microheater;
Fig. 3 is the slide block partial structurtes schematic diagram with microheater;
The concrete structure that Fig. 4 is microheater.
Embodiment
Below in conjunction with accompanying drawing and example, the heat in the present invention being flown to the high structure of controlling slide block is described in further detail.
Fig. 1 is the one-piece construction figure of existing slide block, and Fig. 2 is that Fig. 3 is that the heat that has comprised microheater in the embodiment of the present invention flies the high slide block local structural graph of controlling not containing the existing slide block local structural graph of microheater.Wherein, in Fig. 1, larger cube is the slide block substrate, and its upper surface is air-bearing surface, and the less cube in side is the slide block pad, and magnetic head and well heater all are embedded in pad inside.In Fig. 2, the protective seam of two separation is clipped in the middle reading head, the coil that write head is spiral winding, ten cross sections that small circle is helix in figure.In Fig. 2, perpendicular to figure, inwardly for leaving the direction of current track, be upwards the direction tangent with current track, level is vertical disk direction.
From the contrast of Fig. 2 and Fig. 3, can find out, main device of the present invention is arranged on the centre position of reading head and write head, hereinto between zone increased electro-heat equipment, i.e. a microheater.
Fig. 2 and Fig. 3 are that heat flies the high design diagram of controlling slide block, wherein between the protective seam of the upper protective seam of read head and writing head, newly increase microheater, its centre position in reading head and write head.
Fig. 4 is the concrete structure of microheater in the embodiment of the present invention; in figure, dotted line has represented the direction with the protective seam level; microheater comprises a W mold base; in the lower end of this matrix, the structure division at two V-shape tips is towards air-bearing surface, and as seen from Figure 4; the center protrusion of this W mold base is partly level and smooth circular arc; and shorter, position will be lower than the supporting structure on these W mold base both sides, and two V-shape projections of its bottom are at sharp-pointed corner angle.Be wound around hot-wire coil on the W mold base, and the line density be wound around from the openend of W type toward most advanced and sophisticated direction ascending variation.Matrix can adopt photoresist, and this material heat expansion rate is high, can be issued to larger deformation in the situation that absorbs very little heat, can reach the purpose of saving power.After winding around energising simultaneously, can not produce the magnetic field of disturbing read/write head.The size of microheater and watt level can be adjusted accordingly according to concrete slide block structure.
The W mold base is optimised form, but does not limit to this form, also can be designed to U-shaped, V-type etc.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.Do not break away from the equivalence completed under spirit disclosed in this invention so every or revise, all falling into the scope of protection of the invention.
Claims (2)
1. the heat for hard disk drive flies the high slide block of controlling, 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 successively protective seam and read head lower protective layer on top protective seam, read head in the slide block pad, on read head, between protective seam and lower protective layer, be provided with read head, on the protective seam of top, be wound with and write coil, it is characterized in that, on top protective seam and read head, between protective seam, lay microheater; Described microheater comprises the W mold base and is wound around coil thereon, the close described air-bearing surface in the tip of W mold base; Described be wrapped in loop density on the W mold base from the openend of W type toward most advanced and sophisticated direction ascending variation.
2. heat according to claim 1 flies the high slide block of controlling, and it is characterized in that, the center protrusion of described W mold base is partly level and smooth circular arc and lower than the both sides height.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110092396 CN102280112B (en) | 2011-04-13 | 2011-04-13 | Thermal flying-height control slider for hard disk drive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110092396 CN102280112B (en) | 2011-04-13 | 2011-04-13 | Thermal flying-height control slider for hard disk drive |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102280112A CN102280112A (en) | 2011-12-14 |
| CN102280112B true CN102280112B (en) | 2013-12-18 |
Family
ID=45105521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110092396 Expired - Fee Related CN102280112B (en) | 2011-04-13 | 2011-04-13 | Thermal flying-height control slider for hard disk drive |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102280112B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110275677B (en) * | 2019-05-22 | 2022-04-12 | 华为技术有限公司 | Hard disk format conversion method and device and storage equipment |
Citations (5)
| 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 |
| CN1941089A (en) * | 2005-09-27 | 2007-04-04 | 日立环球储存科技荷兰有限公司 | Disk drive and control method thereof |
| CN101038769A (en) * | 2006-03-14 | 2007-09-19 | 日立环球储存科技荷兰有限公司 | System and method for determining head-disk contact in a magnetic recording disk |
| CN101055724A (en) * | 2006-04-12 | 2007-10-17 | 日立环球储存科技荷兰有限公司 | Thin film magnetic head |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6775103B2 (en) * | 2001-04-02 | 2004-08-10 | Hitachi Global Storage Technologies Netherlands B.V. | Slider head having thermally controlled distal end and assembly with a rotating disc |
-
2011
- 2011-04-13 CN CN 201110092396 patent/CN102280112B/en not_active Expired - Fee Related
Patent Citations (5)
| 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 |
| CN1941089A (en) * | 2005-09-27 | 2007-04-04 | 日立环球储存科技荷兰有限公司 | Disk drive and control method thereof |
| CN101038769A (en) * | 2006-03-14 | 2007-09-19 | 日立环球储存科技荷兰有限公司 | System and method for determining head-disk contact in a magnetic recording disk |
| CN101055724A (en) * | 2006-04-12 | 2007-10-17 | 日立环球储存科技荷兰有限公司 | Thin film magnetic head |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102280112A (en) | 2011-12-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8031561B2 (en) | Joint design of thermally-assisted magnetic recording head and patterned media for high optical efficiency | |
| JP4923267B2 (en) | Magnetic writing apparatus for patterned media with enhanced writing magnetic field | |
| CN101826333B (en) | For the abs with lubricant control trenches of hard disk drive | |
| US10861485B1 (en) | Write heads configured to redirect current | |
| CN101783143A (en) | Thermally assisted recording head and manufacturing method thereof | |
| JP2011060412A (en) | Asymmetrical writing device for single magnetic recording | |
| US9076466B2 (en) | Asymmetric trailing shield writer for shingled magnetic recording (SMR) | |
| US8259412B2 (en) | Thermal fly height control magnetic recording head having a novel heating element geometry | |
| US8411384B2 (en) | Writer having a shield structure for adjacent and far track interference refreshment | |
| US20180033458A1 (en) | Enhanced write pole and return pole for improved areal density | |
| US11894028B2 (en) | Magnetic recording head with trailing shield having multiple throat-heights | |
| US20160035374A1 (en) | Magnetic recording head and magnetic recording and reproducing device | |
| CN102280112B (en) | Thermal flying-height control slider for hard disk drive | |
| US9135942B2 (en) | Heat assisted magnetic recording head having wider heat sink and pole | |
| US20130272104A1 (en) | Writer with increased write field | |
| JP5847772B2 (en) | Transducer head and manufacturing method thereof | |
| US11404080B2 (en) | Optimized dual thermal fly-height design for dual writers for advanced magnetic recording | |
| US10997989B1 (en) | Bilayer hot seed to reduce gap field for magnetic recording heads | |
| JP4366366B2 (en) | Recording medium driving apparatus, head slider and control method therefor | |
| US9019649B2 (en) | Error recovery based on applying current/voltage to a heating element of a magnetic head | |
| CN103177735A (en) | Method for narrowing variation ranges of write magnetic pole skew angle and write magnetic pole employing the method | |
| US11881237B1 (en) | Cross track current design for energy assisted magnetic recording | |
| US7614137B2 (en) | Method of manufacturing a magnetic slider head | |
| Takenoiri et al. | Magnetic Recording Media: Technical Trends and Future Outlook | |
| US20130010391A1 (en) | Thermal flying height control slider with slit in hard disk driver |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131218 Termination date: 20180413 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |