CN103594095A - Vertical magnetic recording head - Google Patents
Vertical magnetic recording head Download PDFInfo
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- CN103594095A CN103594095A CN201310566842.9A CN201310566842A CN103594095A CN 103594095 A CN103594095 A CN 103594095A CN 201310566842 A CN201310566842 A CN 201310566842A CN 103594095 A CN103594095 A CN 103594095A
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Abstract
The invention discloses a vertical magnetic recording head. The vertical magnetic recording head is characterized in that a disc driver comprises a rotatable disc which is supported on a main shaft, the main shaft is driven by the disc driver to rotate, a slider is arranged near the disc, the slider supports one or more magnetic recording head assemblies, the slider can move in or out on the surface of the disc in the radial direction, the slider is connected with an actuator arm through a suspension, the actuator arm is connected to an actuator device, the actuator device is a voice coil motor, the motor comprises a coil which moves in a fixed magnetic field, and the moving direction of the coil and the moving speed of the coil are controlled through current signals provided by a controller. The vertical magnetic recording head has the advantages that magnetic hot points formed near a writing electrode are reduced, and therefore the hot points are prevented from accidentally removing media near or away from data rails, and capacity of the writing electrode and capacity of writing magnetic media are effectively improved.
Description
Technical field
The present invention relates to a kind of magnetic head for data recording, particularly a kind of vertical magnetic recording head.
Background technology
In perpendicular magnetic recording system, magnetic medium has a soft magnetic underlayer being covered by thin hard magnetic top layer.Perpendicular write head has one to have writing the utmost point and having the utmost point that returns of larger xsect of very little xsect.One powerful, and send from writing the utmost point in the direction vertical with magnetic disk surface in highly concentrated magnetic field, magnetization hard magnetic top layer.Consequent magnetic flux through soft bottom, turns back to and returns to the utmost point, and fully scatter and enough a little less than, it can not deleted by the signal that writes utmost point record, when it is returning in the way of the utmost point by hard magnetic top layer.Along with vertical magnetic recording head diminishes, adjacent orbit disturbs (ATI) and long-range track to disturb problems such as (FTI) to occur.Form magnetic focus trail around magnetic shielding in specific region, this problem is particularly serious.Therefore, have and need to design a kind of perpendicular head, it can reduce such adjacent orbit interference and FTI to greatest extent, keeps good magnetic behavior simultaneously.These magnetic focuses are concentrated " leakage " local magnetic field because of magnetic field range structure conventionally in ablation process.The magnetic medium of leakage field under in fact can erasing, causes these adjacent or away from track mistake.
Summary of the invention
The object of the present invention is to provide a kind of vertical magnetic recording head, in order to solve above-mentioned existing issue.
Technical scheme of the present invention is as follows: a kind of vertical magnetic recording head, is characterized in that: disc driver includes a rotating disk and is supported on main shaft, and this main shaft is rotated by disk drive motor; Near disk, be provided with slider, it supports one or more head stacies, and slider can radially move into or shift out on magnetic disk surface; Slider is connected with an actuator arm by suspension, each actuator arm is connected to again on actuator devices, actuator devices is for being voice coil motor, and motor comprises a coil mobile in fixed magnetic field, and the direction that coil moves and speed are controlled by the current signal being provided by controller.
Each ingredient of disk storage system is controlled by the control signal being produced by controller, and by line two, is connected between actuator devices, is connected by line with disk drive motor, transmits by recording channel with head stack.
Vertical magnetic recording head has a magnetic and writes, it includes, and magnetic writes the utmost point and magnetic returns to the utmost point, be magnetic between the two post gap layer and magnetic forming layer is attached thereto, magnetic writes the utmost point and magnetic and returns between the utmost point and have the nonmagnetic coil of writing to pass through, nonmagneticly write the top that coil can be positioned at non magnetic electrically insulating material two, be also embedded in non magnetic electrically insulating material.
Magnetic writing head shields after also including a magnetic, and it can be separated from magnetic writes extremely, after also can connecting, returns to the utmost point.
The sidepiece shielding after magnetic, sidepiece two is extremely separated from writing with non magnetic side clearance layer two by non magnetic side clearance layer, and the trailing edge that writes the utmost point is shielded separated from magnetic by non magnetic post gap layer three.
Magnetic writing head comprises the first hard magnet and the second hard magnet, its be positioned at after around the first and second outsides of magnetic shielding, it has the magnetization and the magnetization two.
After magnetic, in shielding, there is the form of magnetic focus, magnetic focus two, magnetic focus three, magnetic focus four.
The invention has the beneficial effects as follows: reduced magnetic focus and emerged near writing extremely, thereby preventing that such focus is careless removes adjacently or away from the medium of data-track, and has effectively improved the ability that writes magnetic medium of write head.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of disk drive system;
Fig. 2 is from Fig. 1 center line 2-2 intercepting, and the ABS view of the magnetic head slider in position is thereon shown; ;
Fig. 3 is the sectional view of magnetic write head of the present invention;
Fig. 4 is the part ABS view from the magnetic write head of Fig. 3 center line 4-4 observation; ;
Fig. 5 is the ABS view of the write head in a kind of prior art;
Fig. 6 is the ABS view of the write head of another kind of prior art.
In figure, indicate: 100, disc driver, 112, disk, 113, slider, 114, main shaft, 115, suspension, 118, disk drive motor, 119, actuator arm, 121, head stack, 122, magnetic disk surface, 123, line, 125, recording channel, 127, actuator devices, 128, line two, 129, controller, 302, magnetic writing head, 304, magnetic writes the utmost point, 306, magnetic returns to the utmost point, 308, magnetic post gap layer, 310, magnetic forming layer, 312, after magnetic, shield, 316, after return to the utmost point, 318, write coil, 320, non magnetic electrically insulating material, 322, non magnetic electrically insulating material two, 402, sidepiece, 404, sidepiece two, 406, the first hard magnet, 408, the second hard magnet, 410, the magnetization, 412, the magnetization two, 414, non magnetic side clearance layer, 416, non magnetic side clearance layer two, 418, non magnetic post gap layer three, 502, magnetic focus, 504, magnetic focus two, 602, magnetic focus three, 604, magnetic focus four.
Embodiment
By reference to the accompanying drawings, the present invention is described in further detail.
As shown in the figure, vertical magnetic recording head of the present invention, is characterized in that: disc driver 100 includes a rotating disk 112 and is supported on main shaft 114, and this main shaft is by 118 rotations of disk drive motor; Near disk 112, be provided with slider 113, it supports one or more head stacies 121, and slider 113 can radially move into or shift out on magnetic disk surface 122; Slider 113 is connected with an actuator arm 119 by suspension 115, each actuator arm 119 is connected to again on actuator devices 127, actuator devices 127 is for being voice coil motor, motor comprises a coil mobile in fixed magnetic field, and the direction that coil moves and speed are controlled by the current signal being provided by controller 129.Each ingredient of disk storage system is controlled by the control signal being produced by controller 129, with between actuator devices 127, by line 2 128, be connected, be connected by line 123 with disk drive motor 118, transmit by recording channel 125 with head stack 121.Vertical magnetic recording head has a magnetic writing head 302, it includes, and magnetic writes the utmost point 304 and magnetic returns to the utmost point 306, be magnetic between the two post gap layer 308 and magnetic forming layer 310 is attached thereto, magnetic writes the utmost point 304 and magnetic and returns between the utmost point 306 and have the nonmagnetic coil 318 of writing to pass through, nonmagneticly write the top that coil 318 can be positioned at non magnetic electrically insulating material 2 322, be also embedded in non magnetic electrically insulating material 320.Magnetic writing head 302 shields 312 after also including a magnetic, and it can write the utmost point 304 from magnetic separated, after also can connecting, returns to the utmost point 316.After magnetic, shield 312 sidepiece 402, sidepiece 2 404 is separated from writing the utmost point 304 with non magnetic side clearance layer 2 416 by non magnetic side clearance layer 414, and the trailing edge that writes the utmost point 304 shields 312 separation by non magnetic post gap layer 3 418 from magnetic.Write head 302 comprises the first hard magnet 406 and the second hard magnet 408, its be positioned at after around the first and second outsides of magnetic shielding 312, it has the magnetization 410 and the magnetization 2 412.After magnetic, shield the form in 312 with magnetic focus 502, magnetic focus 2 504, magnetic focus 3 602, magnetic focus 4 604.
Concrete structure of the present invention as described above.Referring now to Fig. 1, wherein show the disc driver 100 of the embodiment of the present invention.As shown in Figure 1, at least one rotating disk 112 is supported on main shaft 114, and by 118 rotations of disk drive motor.Magnetic recording on each disk on disk 112 with the form of the circular pattern of concentric data magnetic track.At least one slider 113 is positioned near disk 112, and each slider 113 supports one or more head stacies 121.When disk rotates, slider 113 radially moves into or shifts out on magnetic disk surface 122, to make head stack 121 can enter the different track of disk, wherein writes required data.Each slider 113 is connected on an actuator arm 119 by the mode of suspension 115.Suspension 115 provides a slight spring force, and it is towards magnetic disk surface 122 deflection sliders 113.Each actuator arm 119 is connected on actuator devices 127.As shown in Figure 1, this actuator devices 127 can be voice coil motor (VCM).VCM comprises a coil mobile in fixed magnetic field, and the direction that coil moves and speed are controlled by the current signal of the motor being provided by controller 129.
In the operating process of disk storage system, the air bearing that is rotated in generation between slider 113 and magnetic disk surface 122 of disk 112 applies the power making progress or lifting on slider.Thereby in course of normal operation, air bearing is little by one, substantially invariable spacing carry out the slight spring force of equalizing type of suspension 115 and support slider 113 above magnetic disk surface a little away from.
Each ingredient of disk storage system is controlled by the control signal being produced by controller 129, for example access control signal and internal clock signal.Generally, controller 129 comprises logic control circuit, memory storage and a microprocessor.Controller 129 produces control signals, to control various systems operations, and CD-ROM drive motor control signal on online 123 for example, on online 2 128, head is sought control signal.Control signal on line 2 128 provides required distribution of current, to move best and to locate slider 113 to the desired data magnetic track on disk 112.Write with read signal and transmit from writing with read head 121 by recording channel 125.
As shown in Figure 2, can find out in more detail the direction of head stack 121 in slider 113.Fig. 2 is the ABS view of slider 113, can find out, comprises that the magnetic head of induction write head and read sensor is positioned at the trailing edge of slider.1 object in order to show of the above description of typical disk storage system and appended key diagram.Clearly, disk storage system may comprise a large amount of disks and actuator, and each actuator can support some sliders.
Fig. 3 shows magnetic writing head 302, and it comprises that magnetic writes the utmost point 304 and magnetic returns to the utmost point 306.Magnetic post gap layer 308 is being connected magnetic and is writing the utmost point 304 and return to the utmost point 306 in the position removing from an air bearing surface (ABS) with magnetic forming layer 310.Conduction, the nonmagnetic coil 318 of writing is writing magnetic pole 304 and is returning between the utmost point 306 and pass through, and by magnetic, writes the top of the utmost point 304.Write the top that coil 318 can be positioned at non magnetic electrically insulating material 2 322, be also embedded in non magnetic electrically insulating material 320, as aluminium oxide, or firmly cure photoresist.
In operating process, the electric current of writing coil 318 of flowing through induces ，Gai magnetic field, magnetic field and causes flux flow to write the utmost point 304 through magnetic.This will cause magnetic field to write the utmost point 304 from magnetic sending to magnetic medium, magnetic disk surface 122 as shown in Figure 1.This magnetic writes the field magnetic disk surface of flowing through, and turns back to the magnetic with enough large cross section and return to the utmost point 306, does not eliminate magnetic and writes the magnetic potential that the utmost point 304 writes.
In order to increase write field gradient (thereby being conducive to magnetic switch), write head 302 shields 312 after also comprising a magnetic.After this magnetic, shielding 312 writes the utmost point 304 separated by sidepiece 402 from magnetic.Magnetic writes after the utmost point 312 also can connect and returns to the utmost point 316, and it is connecting and shields 312 and the rear portion of magnetic writing head 3 02 after magnetic, as the rear portion of magnetic forming layer 310.
Fig. 4 shows from ABS(from Fig. 3 center line 4-4) observe the polar cusp of magnetic writing head 302.In Fig. 4, can find out, magnetic writes the utmost point 304 and has a taper, and trapezoidal shape, is characterized in that, it is narrow at leading edge place, and at trailing edge, place is wide.Trailing shielding 312 has sidepiece 402 and 404, and therefore it, be called as around trailing magnetic shielding around the left and right sides that writes the utmost point.The sidepiece of shielding 312 is by non magnetic side clearance layer from writing the utmost point 304 separation, and the trailing edge that magnetic writes the utmost point 304 shields 312 separation by non magnetic post gap layer 418 from magnetic.Although shield 312 as rear circulating type screen layer after having illustrated and described magnetic, screen layer may also have seldom or not have side masked segment, therefore, play function main or pure rear screen layer.
In addition, can find out, magnetic writing head 302 comprises the first and second hard magnet, its be positioned at after around the first and second outsides of magnetic shielding 312.These rigid magnets are magnetized and have the magnetization (by arrow 410,412, representing), and the direction identical with data track direction (DT represents as sideline) is vertical, and is parallel to air bearing surface ABS.Although the arrow points in Fig. 4 is right, this is for explanation, and the magnetization can be in either direction.The existence of magnetized rigid magnet prevents from forming magnetic field range, thereby improves the bit error rate (BER) of write head, and prevents that adjacent orbit from disturbing (ATI) and long-range track to disturb (FTI).
Fig. 5 and 6 all shows the view that is similar to Fig. 4, shows the write head of above-described the first hard magnet 406, the second hard magnet 408 of not having of prior art.In the write head of these prior aries, have been found that and after magnetic, shield the focus 502 that is magnetic in 312, magnetic focus two 504(Fig. 5), magnetic focus 3 602, magnetic focus four 604(Fig. 6) form.These magnetic focuses, as shown in Figure 5, are arranged in these focuses and are considered to debatable especially region.Yet such focus also can be positioned at other parts of rear shielding.External magnetic field can affect intensity and the size of these focuses.These focuses are often formed in the region that magnetic writes 304, two non magnetic side clearance layers of the utmost point and non magnetic post gap layer 3 418, wherein, when transmitting magnetic and write the utmost point 304 and three non magnetic post gap layers, compression magnetic lines of flux.
These focuses are emerged and are caused by the magnetic field range in trailing shielding.Problem of existence of such magnetic focus, at these magnetic focuses 502, magnetic focus 2 504, magnetic focus 3 602, flux concentration magnetizable magnetic medium on the position of magnetic focus 4 604.Although to write in approach that adjacent orbit disturbs may not be a problem single, after several on a data-track of interesting data track write approach, its one or more data-tracks away from planned orbit can be damaged by the existence of these stray magnetic fields.
Refer again to Fig. 4, the first hard magnet 406, the second hard magnet 408 exist and have relaxed this hot issue by apply magnetic field in cross track direction.Magnet can arrange the magnetic direction around shielding with demagnetizing field.In this case, do not need physical connection.In addition, magnet can arrange around shielding direction of magnetization with the exchange field of threading a needle.In this case, need to connect magnet and shielding.It is believed that, error rate BER is improved in the region that the existence in this cross track magnetic field writes the utmost point 304 and non magnetic side clearance layer by shifting magnetic field scope away from magnetic, ACI and FTI.Only, in the magnetic field of 70-80 oersted, can realize showing and improve the bit error rate, ATI and FTI.For this reason, preferably build and calcine the first hard magnet 406, the second hard magnet 408, to write the magnetic field that produces 50-100 oersted or 70-80 oersted on the position of the utmost point 304 at magnetic.
Another benefit that the existence in cross track magnetic field provides is that magnetic switch is than the field gradient being easier to by increasing.This effect is similar to by shielding 312 rear portion after magnetic increases magnetic field gradient through non magnetic post gap layer 3 418.
Although various embodiment described above, should be appreciated that they are only as example, rather than the mode of restriction.Those skilled in the art, also can adopt other embodiment within the scope of the invention.Therefore, range of the present invention and scope should not be limited to any above-mentioned exemplary embodiment, but should be only according to statement below and the restriction of equivalent thereof.
Claims (7)
1. a vertical magnetic recording head, is characterized in that:
Disc driver (100) includes a rotating disk (112) and is supported in main shaft (114) above, and this main shaft is rotated by disk drive motor (118);
Near disk (112), be provided with slider (113), it supports one or more head stacies (121), and slider (113) can radially move into or shift out on magnetic disk surface (122);
Slider (113) is connected with an actuator arm (119) by suspension (115), each actuator arm (119) is connected to again on actuator devices (127), actuator devices (127) is for being voice coil motor, motor comprises a coil mobile in fixed magnetic field, and the direction that coil moves and speed are controlled by the current signal being provided by controller (129).
2. vertical magnetic recording head according to claim 1, it is characterized in that: each ingredient of disk storage system is controlled by the control signal being produced by controller (129), with between actuator devices (127), by line two (128), be connected, be connected by line (123) with disk drive motor (118), transmit by recording channel (125) with head stack (121).
3. vertical magnetic recording head according to claim 1, it is characterized in that: vertical magnetic recording head has a magnetic writing head (302), it includes, and magnetic writes the utmost point (304) and magnetic returns to the utmost point (306), be magnetic between the two post gap layer (308) and magnetic forming layer (310) is attached thereto, magnetic writes the utmost point (304) and magnetic and returns between the utmost point (306) and have the nonmagnetic coil (318) of writing to pass through, nonmagneticly write the top that coil (318) can be positioned at non magnetic electrically insulating material two (322), be also embedded in non magnetic electrically insulating material (320).
4. vertical magnetic recording head according to claim 3, is characterized in that: magnetic writing head (302) shields (312) after also including a magnetic, and it can write the utmost point (304) from magnetic separated, after also can connecting, returns to the utmost point (316).
5. vertical magnetic recording head according to claim 4, it is characterized in that: the sidepiece (402) of shielding (312) after magnetic, sidepiece two (404) is separated from writing the utmost point (304) with non magnetic side clearance layer two (416) by non magnetic side clearance layer (414), and the trailing edge that writes the utmost point (304) is shielded (312) separation from magnetic by non magnetic post gap layer three (418).
6. vertical magnetic recording head according to claim 3, it is characterized in that: magnetic writing head (302) comprises the first hard magnet (406) and the second hard magnet (408), its be positioned at after around the first and second outsides of magnetic shielding (312), it has the magnetization (410) and the magnetization two (412).
7. vertical magnetic recording head according to claim 4, is characterized in that: the form in shielding (312) after magnetic with magnetic focus (502), magnetic focus two (504), magnetic focus three (602), magnetic focus four (604).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310566842.9A CN103594095A (en) | 2013-11-13 | 2013-11-13 | Vertical magnetic recording head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310566842.9A CN103594095A (en) | 2013-11-13 | 2013-11-13 | Vertical magnetic recording head |
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| CN103594095A true CN103594095A (en) | 2014-02-19 |
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| CN201310566842.9A Pending CN103594095A (en) | 2013-11-13 | 2013-11-13 | Vertical magnetic recording head |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5495378A (en) * | 1995-01-30 | 1996-02-27 | Seagate Technology, Inc. | Magnetoresistive sensor with improved performance and processability |
| CN101246694A (en) * | 2007-02-15 | 2008-08-20 | 日立环球储存科技荷兰有限公司 | Magnetic writing head with top back pole optimization to reduce tail shield piece protrusion |
| US20120026628A1 (en) * | 2010-07-27 | 2012-02-02 | Zhihao Li | Perpendicular magnetic write head having a trailing wrap-around magnetic shield magnetically biased in a cross track direction |
-
2013
- 2013-11-13 CN CN201310566842.9A patent/CN103594095A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5495378A (en) * | 1995-01-30 | 1996-02-27 | Seagate Technology, Inc. | Magnetoresistive sensor with improved performance and processability |
| CN101246694A (en) * | 2007-02-15 | 2008-08-20 | 日立环球储存科技荷兰有限公司 | Magnetic writing head with top back pole optimization to reduce tail shield piece protrusion |
| US20120026628A1 (en) * | 2010-07-27 | 2012-02-02 | Zhihao Li | Perpendicular magnetic write head having a trailing wrap-around magnetic shield magnetically biased in a cross track direction |
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Application publication date: 20140219 |
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