CN1153569A - Magnetic head and system for controlling position of magnetic head - Google Patents
Magnetic head and system for controlling position of magnetic head Download PDFInfo
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- CN1153569A CN1153569A CN 96190452 CN96190452A CN1153569A CN 1153569 A CN1153569 A CN 1153569A CN 96190452 CN96190452 CN 96190452 CN 96190452 A CN96190452 A CN 96190452A CN 1153569 A CN1153569 A CN 1153569A
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Abstract
A write head, particularly a buried servowrite head provided with a head face (21) having a longitudinal direction (L) along which a magnetic recording medium can be relatively moved with respect to the magnetic head, and a width direction (W) oriented transversely to the longitudinal direction. In order to write signals simultaneously in various tracks, the write head is provided with a structure having integrated, juxtaposed write units (25a; 25b) extending substantially transversely to the longitudinal direction and the width direction and each being provided with at least one write gap (27a; 27b). One write gap of the one write unit and one write gap of the other write unit of every two adjacent write units are situated in mutually different planes (P1; P2) which are oriented substantially transversely to the longitudinal direction.
Description
The present invention relates to a kind of magnetic head, particularly relate to a kind of write head that is provided with the magnetic head workplace and terminates in the conversion magnetic gap of this magnetic head workplace, described magnetic head workplace has longitudinal direction and perpendicular to the transverse direction of this longitudinal direction, magnetic recording medium can move along the relative magnetic head of described longitudinal direction.
The invention still further relates to and a kind of signal is written to device on the magnetic recording medium, this device comprises a write head and the device that recording medium is moved along the relative magnetic head of surface of contact.
The invention further relates to the servo-drive system of control head with respect to the position of the track part of magnetizable recording medium, this recording medium can be moved with respect to magnetic head, and has many track parts arranged side by side.
The invention further relates to the playback head that is used for servo-drive system.
U.S. Pat 4,318,141 disclose a kind of magnetic recording system, and the disclosed technical scheme of the document is to track with flush type servosignal or track position signal, writes winding and the single magnetic head writing servo signal that writes magnetic gap with being provided with.This magnetic gap has relatively long magnetic gap length, so that servosignal can be recorded on the darker degree of depth of recording medium.This magnetic head also has single writing/read magnetic gap, and from the direction of track part, this writes/read magnetic gap and is in the back that writes magnetic gap.According to the 1st kind of method, this writes/reads magnetic gap when reading servosignal, cooperates write circuit data-signal to be stored in the shallow-layer part of recording medium.According to the 2nd kind of method, the servosignal that reads the recorded data signal simultaneously and write down.The shortcoming of one type of prior art syringe and used magnetic head thereof is only to have one to write magnetic gap and write and read only information track part.
The purpose of this invention is to provide and a kind ofly can particularly can write on magnetic head on the different track to signal to servosignal simultaneously.
It is incorporate along the writing unit arranged side by side that substantially extends perpendicular to longitudinal direction and transverse direction to be characterised in that according to magnetic head of the present invention its structure has, each writing unit all be provided with at least one magnetic gap of at least one writing unit that writes magnetic gap, two adjacent writing units (preferably per two adjacent writing units) and another writing unit at least one write magnetic gap and be in the orientation that differs from one another substantially on the plane perpendicular to longitudinal direction.Can provide according to magnetic head of the present invention the track part of the different information that are adjacent to each other is written in possibility on the recording medium.According to the magnetic system of using the flush type servo-drive system, its advantage is can be from writing and the sense information signal across two adjacent information track parts that write the servo track part of servosignal according to magnetic head of the present invention of using.
According to an embodiment of magnetic head of the present invention, it is characterized in that two adjacent writing units (preferably per two adjacent writing units) be in each other on the Different Plane to write magnetic gap adjacent with same plane, the orientation on this plane is substantially perpendicular to transverse direction.In this multichannel magnetic head, writing unit is adjacent each other, and its advantage is that the track part that the phase Kuai, a state in the Zhou Dynasty connects is that gapless track part is written on the recording medium; In other words, the coverage between track part is zero.This is a particular importance for using the flush type system in the magnetic recording system, and the effect that is presented may be a particular importance concerning the memory capacity that increases magnetic recording medium.
According to magnetic head of the present invention be specially adapted to by means of can write/the playback head unit with respect to the mode of the track part on magnetic recording medium location recorded servo signal on magnetic recording medium, write and/or the sense information signal during, this writes/part of reading of playback head unit detects by the position according to the formed servo track part of write head of the present invention with reading servo-information.
Can form many servo track parts with the signal with multi-wavelength by means of magnetic head of the present invention and come magnetic recording medium is formatd, these signals have than the wavelength of the information signal that will be recorded after a while long wavelength more.Have been found that write again in recording medium fashionable, the relative information signal of the shorter wavelength already present servo-information of not erasing.
Preferably provide servo track part according to the anti-phase mode of adjacent track part magnetic, like this, write and/or sense information during, write/part of reading of sensing element moves to the position that just can find two servo track parts on the minimum position of output, write/the playback head unit amplitude place such as is in, write/the playback head unit just accurately appears on the servo track part between two adjacent track parts.
According to the embodiment of magnetic head of the present invention, it is characterized in that on the Different Plane each of being in each other of two adjacent writing units (preferably per two adjacent writing units) writes magnetic gap at the public magnetic pole of the magnetic conduction that ends at the magnetic head workplace with end between the single magnetic pole of magnetic head workplace and extend.In this embodiment, the shared magnetic pole of adjacent writing unit, the single magnetic pole of adjacent writing unit then alternately appear at the one side or the another side of relevant magnetic pole.
According to the embodiment of magnetic head of the present invention, it is characterized in that the single magnetic pole of two adjacent writing units (preferably per two adjacent writing units) and orientation are adjacent perpendicular to the same plane of Width substantially.In this embodiment, on recording medium, the single magnetic pole of coplane is spaced apart by the pitch of servo track part minimumly, and the coverage between track part is zero.Therefore, can reach maximum track part density at the enterprising line item of magnetic recording medium, can be suitable for especially as being used for writing simultaneously the servo write head of flush type of a large amount of servo track parts according to magnetic head of the present invention, the information signal on the adjacent track part is preferably anti-phase.
According to the embodiment of magnetic head of the present invention be characterised in that one between the magnetic pole of a plurality of at least write elements, extend write winding, basically using one, to write winding just enough, the part of this winding is extended being between public magnetic pole on the plane and the single magnetic pole, and another part extends being between public magnetic pole on another plane and the single magnetic pole, write winding two terminations are arranged, adjacent write element writes according to mode inverting each other, for example, if necessary, this magnetic head can be provided with very many write elements, so, these write elements can divide into groups by writing winding, and the winding that is proposed can easily be realized according to prior art.
Embodiment according to magnetic head of the present invention, it is characterized in that a writing unit in two adjacent writing units (preferably per two adjacent writing units) is provided with two and writes magnetic gap, one of them writes magnetic gap and is in and the writing on the same plane of magnetic gap of another writing unit, simultaneously, the magnetic gap that writes of coplane extends between two public magnetic poles of magnetic conduction that terminate on the magnetic head workplace; And another writes magnetic gap and extends between the single magnetic pole of public magnetic pole and magnetic conduction.This magnetic head with many technological merits is applicable to writing servo information during the record that recording medium must be only moves along a relative magnetic head of direction.Recording medium is contacted with public magnetic pole, and signal just is written in the wide scope; If recording medium is contacted with single magnetic pole, the signal that the front write will be write partly again.
Embodiment according to magnetic head of the present invention, it is characterized in that its structure is the sandwich construction that has substantially the layer that extends perpendicular to the magnetic head workplace, and at least one of a writing unit of two adjacent writing units (preferably per two adjacent writing units) write magnetic gap and another writing unit at least one write magnetic gap and be on the layer that differs from one another.
According to the embodiment of magnetic head of the present invention, it is characterized in that from Width at least one writing unit has the size bigger than another writing unit, therefore can realize the servo track part structure that not only comprises clock but also comprise positional information.In scan period, at least one sensing element of multichannel magnetic head can scan the whole piece track part all the time, and its advantage is that the phase place that can determine the information in the track part can be determined the position of this magnetic head with respect to track part again.
Further purpose of the present invention provides and a kind of signal on the adjacent track part is written to device on the recording medium.
Comprise according to magnetic head of the present invention and the device that recording medium is moved with respect to magnetic head along the magnetic head workplace according to the device that is used for writing information of the present invention.This device can be particularly well suited to write simultaneously the situation that a large amount of servo track parts, the particularly mode that is written into according to adjacent servo track part write anti-phasely.
Further purpose of the present invention provides the servo-drive system that the enough simple modes of a kind of energy realize.
According to servo-drive system of the present invention comprise be used for servosignal be written on the track part according to magnetic head of the present invention and be used for reading simultaneously the information signal that is stored on the described track part and the reading magnetic head of servosignal.Preferably have to be used for the device of mobile playback head, particularly be used for making being in the device that the playback head that is parallel to the recording medium plane moves along the direction perpendicular to the track part of recording medium, and the output signal that contains servo-information of playback head is controlled described device.This playback head can be the part of combined record, and its another part is a write head.When such writing/playback head is used to sense information signal and long wave servosignal, during writing just information signal recording between two servo track parts.At the multichannel playback head or write/playback head in, all read channels can mainly be used to read servo-information, the advantage of doing like this is can reach optimum signal-noise ratio for servosignal.
Embodiment according to servo-drive system of the present invention, it is characterized in that playback head is provided with a magnetic head workplace and a layer structure, this layer structure constitutes by having the parallel sensing element of reading magnetic gap and substantially extending perpendicular to the magnetic head workplace, and each of two adjacent sensing elements (preferably per two adjacent sensing elements) read magnetic gap at the public magnetic pole of the magnetic conduction that ends at the magnetic head workplace with terminate between the single magnetic pole of magnetic head workplace and extend.Used can forming write/advantage of this playback head of the part of playback head unit be can suppress because servo track part density with respect to the big and issuable subsidiary effect of reading of wavelength of servosignal.Public magnetic pole prevents that sensing element from reading in abutting connection with the servo-information of track part and adjacent track part.
Another object of the present invention provides a kind of playback head that is used for servo-drive system.
Have the magnetic head workplace according to playback head of the present invention, and comprise particularly membrane structure of a layer structure.This layer structure constitutes by having the parallel sensing element of reading magnetic gap and substantially extending perpendicular to the magnetic head workplace, and each of two adjacent sensing elements (sensing elements of preferably per two phase Kuai, a state in the Zhou Dynastys) read magnetic gap at the public magnetic pole of the magnetic conduction that ends at the magnetic head workplace with terminate between the single magnetic pole of magnetic head workplace and extend.Because its above-mentioned characteristic, so this playback head can be suitable for using in according to servo-drive system of the present invention well.
With reference to explanation that embodiment described later did these and other various aspects will be clearer of the present invention.
Fig. 1 represent to be used for signal be written on the banded recording medium according to device of the present invention;
Fig. 2 A is the front-view schematic diagram according to the 1st embodiment of magnetic head of the present invention;
Fig. 2 B is the diagrammatic cross-section of IIB-IIB line of the 1st embodiment of this magnetic head;
Fig. 2 C is the diagrammatic cross-section along the IIC-IIC line of the 1st embodiment;
Fig. 3 A is the floor map according to the 2nd embodiment of magnetic head of the present invention;
Fig. 3 B is the front-view schematic diagram according to the 2nd embodiment of magnetic head of the present invention;
Fig. 3 C is the diagrammatic cross-section along the IIIC-IIIC line of the 2nd embodiment;
Fig. 3 D is the diagrammatic cross-section along the IIID-IIID line of the 2nd embodiment;
Fig. 4 is the front-view schematic diagram according to the 3rd embodiment of magnetic head of the present invention;
Fig. 5 A is the front-view schematic diagram according to the embodiment of playback head of the present invention;
Fig. 5 B is the diagrammatic cross-section along the VB-VB line according to the embodiment of playback head of the present invention;
Fig. 6 is the synoptic diagram according to the 1st embodiment of servo-drive system of the present invention;
Fig. 7 is the synoptic diagram according to the 2nd embodiment of servo-drive system of the present invention.
Device shown in Figure 1 is to be applicable to the tape unit 1 that cooperates with magnetic tape cassette 3, and this magnetic tape cassette 3 is equipped with the tape that is applicable to digital store information.The equipment 1 that is provided with the cassette holder 7 that is used for keeping magnetic tape cassette 3 forms magnetic tape system with magnetic tape cassette 3, and equipment 1 is provided with two dish axles 9 and 10 that cooperate with the dish core of magnetic tape cassette 3.Between the operating period, tape is pasting according to the magnetic head 11 that is used for equipment 1 of the present invention and is passing through, and equipment 1 is provided with two capstans 13 and 14, and is provided with two pinch rollers 15 and 16 that match with capstan.Magnetic head 11 as write head is used to a large amount of servo track parts is written on the tape, and for example 65, particularly the servo track part of flush type is written on the tape.
Shown in Fig. 2 A, 2B and the 2C is thin-film head according to write head of the present invention, this magnetic head has the magnetic head workplace 21 that cooperates with magnetic recording medium such as tape, this tape can be continued to use the direction of arrow L indication and move with respect to magnetic head, direction L is corresponding to the longitudinal direction of magnetic head 21, the transverse direction W that this magnetic head 21 also has perpendicular to longitudinal direction.This magnetic head is by for example Al
2O
3The non-magnetic substrate 23 of the stupalith of/TiC constitutes, and uses known technology on it, particularly forms a sandwich construction with photoetching technique.This structure is provided with a plurality of adjacent writing unit 25a and the 25b that extends along perpendicular to longitudinal direction L and transverse direction W, and writing unit 25a and writing unit 25b replace mutually.Each writing unit 25a and 25b are respectively arranged with and write magnetic gap 27a and 27b, and all magnetic gap 27a that write are in the 1st plane P of extending along perpendicular to longitudinal direction L
1On, all magnetic gap 27b that write are in along being parallel to the 1st plane P
1The 2nd plane P of extending
2On.
Sandwich construction is made of the 1st soft magnetosphere 24, and NiFe for example, AlFeSi or CoNbZr are deposited on the soft magnetosphere that forms on the substrate 23.The 1st layer 24 by such form formation, that is: to each writing unit 25b, form the single magnetic pole 29b of a magnetic conduction, if substrate 23 is magnetic conductions, between substrate 23 and magnetic pole 29b a separation layer will be arranged, substrate itself also can constitute the magnetic conduction substrate as a magnetic pole.
Sandwich construction comprises that also the 2nd and the 3rd soft magnetosphere 26 that is parallel to the 1st layer 24 respectively and 28, the 2 layers are a not interrupting layer substantially, and constitutes the 3rd layer 28 for each writing unit 25a, and forms the single magnetosphere 29a of a magnetic conduction.The 2nd layer 26 for writing unit 25a and 25b, be between single magnetic pole 29a and the public magnetic pole 29c each write magnetic gap 27a and be in single magnetic pole 29b and public magnetic pole 29c between each write magnetic gap 27b, form a public magnetic pole 29c.In order to form suitable magnetic circuit, various soft magnetospheres are connected to each other.
Be in the plane P 1 that differs from one another and P2 and by picture Al
2O
3Or SiO
2Deng nonmagnetic substance constitute write magnetic gap 27a and 27b is the paired form that is adjacent to a face and is perpendicular to same the H of transverse direction W, single track part 29a and the 29b of per two adjacent writing unit 25a and 25b also are adjacent to same H.
This sandwich construction also comprises the 1st conductive layer 30 and the 2nd conductive layer 32, and they are respectively by extending between the 1st and the 2nd soft magnetosphere 24 and 26 and for example Cu between the 2nd and the 3rd soft magnetosphere 26 and 28 forms.Constitute conductive layer 30 and 32, and they are connected with each other, layer 30 and 32 forms the winding 31 and 33 that is in the yoke that is formed by magnetic pole.Conductive layer 30 and 32 is connected to joint face 34 and 36 through the soft magnetosphere 26 and 28 of conduction respectively.Single magnetic pole 29a and 29b and public magnetic pole 29c also are connected to joint face, and these are all not expressions in the drawings.In order to protect this sandwich construction, magnetic head can be provided with a back-up block, so that this sandwich construction is enclosed between substrate and this back-up block, this back-up block can be with forming with the same material of the material that forms substrate.
Be provided with magnetic head workplace 41 according to magnetic head of the present invention shown in Fig. 3 A, 3B, 3C and the 3D, and comprise that writes a winding 42 with longitudinal direction L and transverse direction W.Magnetic recording medium can move by direction L or opposite direction along magnetic head workplace 41, this magnetic head also is provided with the writing unit 45a of one and the structure of 45b, writing unit is set up in parallel and along extending perpendicular to longitudinal direction L and transverse direction W, therefore, their orientation is just perpendicular to magnetic head workplace 41.A writing unit among per two adjacent writing unit 45a and the 45b, promptly writing unit 45a has two to write magnetic gap 47a1,47a2, and another writing unit, promptly writing unit 45b has one to write magnetic gap 47b.These two of writing among magnetic gap 47a1 and the 47a2 write magnetic gap, be that 47a2 is in and write in the same plane K1 of magnetic gap 47b, these two described later write magnetic gap 47a2 and 47b extends between public magnetic pole 50a of two magnetic conductions that ends at magnetic head workplace 41 and 50b, the magnetic gap 42a1 that writes that is on the K2 of plane extends between the single magnetic pole 49 of public magnetic pole 50a and magnetic conduction.
Fig. 3 A to shown in Fig. 3 D according to write head of the present invention in, its structure is the sandwich construction with the layer that extends perpendicular to magnetic head workplace 41.Being formed and be in by nonmagnetic substance of per two adjacent writing unit 45a and 45b writes magnetic gap 47a1 and 47b and adjacent perpendicular to the same plane T of transverse direction W orientation on the plane K1 that differs from one another and the K2.
Shown in Figure 4 is provided with the magnetic head workplace 61 with longitudinal direction L and transverse direction W according to write head of the present invention, magnetic recording medium can move on magnetic head workplace 61 along longitudinal direction L, this magnetic head has roughly corresponding to Fig. 3 A, 3B, the configuration of the writing unit of write head shown in the 3C, therefore magnetic head shown in Figure 4 is only described briefly, this magnetic head have form one have writing unit 65a arranged side by side and the 65b that writes magnetic gap 67a and 67b respectively, the magnetic gap that writes of per two adjacent writing unit 65a and 65b is on the plane that differs from one another.The same with the embodiment that has described, this magnetic head can be suitable for as the flush type servo head well.In order to add that during the writing servo track part clock and positional information, the special character of this embodiment are that at least one writing unit 65a sees the size that has greater than another writing unit from transverse direction W.Therefore, can be with the servo track part that writes the track part that magnetic gap writes broad, particularly broad of the represented broad of 67a among Fig. 4.
Comprise a membrane structure according to playback head of the present invention shown in Fig. 5 A and the 5B, and be provided with a magnetic head workplace 102, the membrane structure that can be arranged on the non-magnetic substrate comprises the public magnetic pole 104 of the magnetic conduction that terminates in magnetic head workplace 102 and the single magnetic pole 106 that several (being 4 in this example) terminate in the magnetic conduction of magnetic head workplace 102, and the single magnetic pole 106 that has soft magnetism magnetic pole 108 is in abutting connection with the interval 110 with magnetoresistive element 112 bridge joints.Between each magnetic pole just like the electrically insulating material of crystal and so on; in this embodiment; membrane structure has the magnetic bias winding 114 that is used for the magnetoresistive element magnetic bias, also can substitute magnetoresistive element with the induction sensing element, protects this membrane structure with non magnetic back-up block 116.
Shown in playback head in, the sensing element 118 that extends perpendicular to magnetic head workplace 102 can be distinguished, each sensing element 118 has one to read magnetic gap 120 between public magnetic pole 104 and single magnetic pole 106, because be not subjected to read the influence of effect according to playback head of the present invention, so this playback head particularly suitable is as the flush type servo head because of the side of using continuous public magnetic pole 104 to cause.
Shown in Figure 6 comprises according to write head of the present invention with according to playback head of the present invention according to servo-drive system of the present invention.Be not shown in write head on Fig. 6 according to Fig. 2 A, 2B, 2C or Fig. 3 A, 3B, 3C, 3D or method shown in Figure 4 realize.Used in this example write head is provided with and is used for the low frequency servosignal during the format of tape 200 is written in 6 servo track part or servo track part S of flush type that detect track part
a, S
b, S
c, S
d, S
eAnd S
fOn 6 write magnetic gap, track part S wherein
a, S
cAnd S
eOn servo-information and track part S
b, S
dAnd S
fOn the servo-information phase place opposite.Information signal can be written on the tape 200 through having formatd, locatees this write head according to the mode that shortwave information track part Da accurately is written in two zone of transition between the servo track part.In this embodiment, two information track part Da and two information track part D are arranged on tape 200
b, every information track part all is in the middle part of servo track part.
In this example, implement according to the method shown in Fig. 5 A and the 5B with the playback head of label 202 marks on Fig. 6, and be provided with 4 and read magnetic gap 204a, 204b, 204c and 204d, playback head 202 is scanning servo track part and information track part simultaneously, so that can obtain 4 read output signal x during reading
a, x
b, x
cAnd x
d, wherein two servo-informations and other two information, as: data message, audio-frequency information or video information.Signal X
a, X
b, X
cAnd x
dDeliver to after the amplifier I, output signal x
a', X
b', x
c' and X
d' deliver to the unit II that is used for carrying out bit-detection and possible equilibrium and make whole low frequency signal y
a, y
b, y
cAnd y
dThe low-pass filter III that passes through, the y of these signals
aAnd y
cBe position signalling, y
bAnd y
dIt is clock signal.Position signalling y
aAnd y
cBe sent to totalizer IVa, and clock signal is sent to totalizer IVb, then, carries out obtaining position signalling y after the suitable additive operation
AcWith clock signal y
BdLatter two signal is delivered to lock detector unit V, in this lock detector, is signal Processing control signal c, this control signal can be used to set the position of playback head 202 with respect to tape 200, preferably control signal c is sent to electric unit 206 via amplifier VI, electric unit in this example is the rotation motor of magnetic head gearshift.A kind of device in back comprises a slide block 208 that is contained on the support (not shown), like this, just can carry out along the Y direction displacement perpendicular to tape direction X.In this embodiment, slide block 208 has one with holes 210 arm 208a, and there is interior rib-loop in this hole 210, and the outstanding axle 212 that has the electro-motor 206 of outer rib-loop passes this hole 210.Reading magnetic gap 204a can be accurately and follow track part on the tape 202 effectively to 204d, and tape 202 usefulness move along directions X according to system of the present invention.
Shown in Figure 7 comprises that according to servo-drive system of the present invention this system adapts to the tape 404 that moves along directions X according to write head 400 of the present invention with according to of the present invention writing/playback head 402.This write head 400 is servo write heads of a type shown in Figure 4, and is provided with 7 servo magnetic gap 400t-400z that write.After magnetic head 400 was connected to current source X, the tape 404 that moves along this magnetic head was provided with 7 flush type track part S with low-frequency information simultaneously
t-Sz, track part St, Sv, the phase place of the servosignal of Sx and Sz and track part Su, the phase place of Sw and Sy is opposite.Read-out/write-in magnetic head or contract is called combined record 402 and is provided with 4 and reads/writing unit 402W-402Z, each reads/and writing unit all has one to read magnetic gap 403a and one and write magnetic gap 403b, from the vertical direction Y of tape, it is the narrowest a little like writing magnetic gap to read magnetic gap.Combined record 402 is fixed on the magnetic head displacement unit 406, and this magnetic head displacement unit 406 can move along the Y direction perpendicular to directions X, and electric unit 410 can drive this unit 406 via delivery unit 408.
The information signal i that is sent to combined record 402 through amplifier XI can be recorded on the tape 404 with combined record 402, can form 4 information track parts simultaneously, track part Dw-Dz for example, and each of information track part Dw and Dz is all extended in the both sides of the boundary line of two adjacent servo track parts, and information track part Dx and Dz then are all within a servo track part.
During use, combined record 402 is sent read output signal r here, and this read output signal r comprises the long wave servo-information, if information signal has been stored on the tape, also comprises shortwave information.Through amplifier unit XII read output signal is delivered to low-pass filter unit XIII, and deliver to lock detector unit XIV from this unit position signalling p and clock signal d.This lock detector unit XIV is added to electric unit 410 to control signal cc through amplifier XV, is used for setting continuously and correcting read-out/write-in magnetic head 402 with respect to the position through formative tape 404.After the writing information track part Dw-Dz, displacement unit 406 after direction Y moves, further writing information track part, for example track part Dw '-Dz '.
Should be noted that the embodiment of the present invention shown in not being restricted to, for example, conversion magnetic gap number can be littler or big than employed number among the embodiment, can also substitute banded recording medium with disc recording medium.
Claims (13)
1. magnetic head, particularly a kind of write head, be provided with a magnetic head workplace with longitudinal direction and transverse direction, magnetic recording medium can move with respect to magnetic head along described longitudinal direction, described transverse direction is perpendicular to described longitudinal direction, also be provided with the conversion magnetic gap that ends at described magnetic head workplace, it is characterized in that its structure has forms one, be set up in parallel, cardinal principle is perpendicular to the writing unit of described longitudinal direction and transverse direction extension, each said write unit all is provided with at least one and writes magnetic gap, and at least one magnetic gap of a writing unit of two adjacent writing units and at least one of another writing unit write magnetic gap and be on the plane that differs from one another of cardinal principle perpendicular to described longitudinal direction.
2. according to the magnetic head of claim 1, it is characterized in that writing magnetic gap with adjacent perpendicular to the same plane of transverse direction substantially on the plane that being in of two adjacent writing units differ from one another.
3. according to the magnetic head of claim 1 or 2, it is characterized in that writing magnetic gap at the public magnetic pole of the magnetic conduction that ends at described magnetic head workplace with end between the single magnetic pole of described magnetic head workplace and extend on the plane that being in of two adjacent writing units differ from one another.
4. according to the magnetic head of claim 3, the single magnetic pole that it is characterized in that two adjacent writing units is with adjacent perpendicular to the same plane of transverse direction.
5. according to the magnetic head of claim 3 or 4, it is characterized in that having one between the magnetic pole of a plurality of at least writing units, extend write winding.
6. according to the magnetic head of claim 1 or 2, a writing unit that it is characterized in that two adjacent writing units is provided with two and writes magnetic gap, one of them writes magnetic gap and is in and the writing on the same plane of magnetic gap of another writing unit, and the magnetic gap that writes of coplane extends between the public magnetic pole of two magnetic conductions that end at described magnetic head workplace, and another writes magnetic gap and extends between the single magnetic pole of a public magnetic pole and a magnetic conduction.
7. according to the magnetic head of any claim of claim 1 to 6, it is characterized in that its structure is the sandwich construction that has substantially the layer that extends perpendicular to described magnetic head workplace, at least one of a writing unit of two adjacent writing units write magnetic gap and another writing unit at least one write magnetic gap be in differ from one another layer on.
8. according to the magnetic head of any claim of front, it is characterized in that at least one writing unit has the size bigger than another writing unit from the transverse direction of magnetic head workplace.
9. one kind writes the device of magnetic recording medium to signal, comprises the write head of aforementioned any one claim and the device that recording medium is moved along the magnetic head workplace with respect to magnetic head.
10. a control head is with respect to the servo-drive system of the track position of magnetic recording medium, described magnetic recording medium can be with respect to described magnetic head motion, and comprise many track parts arranged side by side, described servo-drive system comprises and is used for servosignal is write any magnetic head of the claim 1 to 7 of described track part, also comprises being used for reading simultaneously the information signal that is stored on the described track part and the playback head of servosignal.
11. servo-drive system according to claim 10, it is characterized in that this device is used for making the playback head on the face that is in the plane that is parallel to recording medium to move along the direction perpendicular to the track part of recording medium, the output signal that comprises servo-information of described playback head is controlled described device.
12. servo-drive system according to claim 10 or 11, it is characterized in that playback head is provided with a magnetic head workplace and a layer structure, described layer structure comprises a plurality of parallel sensing elements, each sensing element has one and reads magnetic gap, and substantially extend perpendicular to the magnetic head workplace, two adjacent sensing elements read magnetic gap each read magnetic gap all at the public magnetic pole of the magnetic conduction that ends at the magnetic head workplace with end between the single magnetic pole of magnetic head workplace and extend.
13. one kind is used for claim 10, the playback head of 11 or 12 servo-drive system, it is characterized in that described playback head is provided with a magnetic head workplace and a layer structure, described layer structure comprises parallel sensing element, each sensing element has a magnetic gap, and substantially extend perpendicular to described magnetic head workplace, each sensing element of two adjacent sensing elements is at the public magnetic pole of the magnetic conduction that ends at described magnetic head workplace and end between the single magnetic pole of magnetic head workplace and extend.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96190452 CN1153569A (en) | 1995-03-24 | 1996-03-11 | Magnetic head and system for controlling position of magnetic head |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP95200742.5 | 1995-03-24 | ||
| CN 96190452 CN1153569A (en) | 1995-03-24 | 1996-03-11 | Magnetic head and system for controlling position of magnetic head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1153569A true CN1153569A (en) | 1997-07-02 |
Family
ID=5128037
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96190452 Pending CN1153569A (en) | 1995-03-24 | 1996-03-11 | Magnetic head and system for controlling position of magnetic head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1153569A (en) |
-
1996
- 1996-03-11 CN CN 96190452 patent/CN1153569A/en active Pending
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