WO2004079723A1 - 磁気抵抗ヘッド - Google Patents
磁気抵抗ヘッド Download PDFInfo
- Publication number
- WO2004079723A1 WO2004079723A1 PCT/JP2003/002659 JP0302659W WO2004079723A1 WO 2004079723 A1 WO2004079723 A1 WO 2004079723A1 JP 0302659 W JP0302659 W JP 0302659W WO 2004079723 A1 WO2004079723 A1 WO 2004079723A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- film
- magnetoresistive
- magnetic
- electrode terminal
- disposed
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/127—Structure or manufacture of heads, e.g. inductive
- G11B5/33—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only
- G11B5/39—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects
- G11B5/3903—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects using magnetic thin film layers or their effects, the films being part of integrated structures
- G11B5/3906—Details related to the use of magnetic thin film layers or to their effects
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/127—Structure or manufacture of heads, e.g. inductive
- G11B5/33—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only
- G11B5/39—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects
- G11B5/3903—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects using magnetic thin film layers or their effects, the films being part of integrated structures
- G11B5/3906—Details related to the use of magnetic thin film layers or to their effects
- G11B5/3929—Disposition of magnetic thin films not used for directly coupling magnetic flux from the track to the MR film or for shielding
- G11B5/3932—Magnetic biasing films
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B2005/0002—Special dispositions or recording techniques
- G11B2005/0005—Arrangements, methods or circuits
- G11B2005/001—Controlling recording characteristics of record carriers or transducing characteristics of transducers by means not being part of their structure
- G11B2005/0013—Controlling recording characteristics of record carriers or transducing characteristics of transducers by means not being part of their structure of transducers, e.g. linearisation, equalisation
- G11B2005/0016—Controlling recording characteristics of record carriers or transducing characteristics of transducers by means not being part of their structure of transducers, e.g. linearisation, equalisation of magnetoresistive transducers
- G11B2005/0018—Controlling recording characteristics of record carriers or transducing characteristics of transducers by means not being part of their structure of transducers, e.g. linearisation, equalisation of magnetoresistive transducers by current biasing control or regulation
Definitions
- the present invention relates to a magnetic resistance head used for a magnetic recording device such as a magnetic disk device and a magnetic tape device. Background technology
- the recording density of magnetic disk drives currently on the market is around 20 Gbit / in2, but the increase in recording density is increasing at an annual rate of about twice. For this reason, there is a demand for a magnetoresistive sensor and a magnetoresistive head capable of responding to a smaller magnetic field range and sensing a small change in an external magnetic field.
- spin-valve magnetic resistance sensors using the spin-valve GMR effect are widely used for magnetic heads.
- the magnetization direction of the free ferromagnetic layer changes due to the signal magnetic field from the recording medium, and the magnetization direction of the pin ferromagnetic layer (bind layer) changes.
- the resistance of the magnetic resistance sensor changes.
- the magnetoresistive sensor is used for a magnetic head, the magnetization direction of the pinned layer is fixed to the element height direction of the magnetoresistive element, and the magnetization direction of one free layer in the state where no external magnetic field is applied is applied. Is generally designed in the element width direction orthogonal to the pinned layer.
- a sense current is caused to flow parallel to the film surface, and the resistance change due to an external magnetic field is read.
- this current-in-plane (CIP) structure in which current flows parallel to the GMR film surface, the output decreases when the sense area defined by the pair of electrode terminals becomes smaller.
- the magnetic head of the CIP structure using the spin valve GMR effect can support a recording density of 20 to 40 Gbit Zin2. Even if the latest technology of specular scattering is applied, the recording density of 60 Gbit / in 2 is considered to be the upper limit. As described above, the recording density of magnetic disk devices has been rapidly increasing, and a recording density of 80 Gbit / in 2 is required in 2002. When the recording density is 80 Gbit / in 2 or more, it is extremely difficult to cope with the output and the distance between the magnetic shields even with the latest CIP spin valve GMR magnetic head that uses the standard scattering. is there.
- GMR GMR and tunnel MR
- CPP Current Perpendicular to the Plane
- TMR has a structure in which a thin insulating layer is sandwiched between two ferromagnetic layers, and the amount of tunnel current passing through the insulating layer changes depending on the magnetization directions of the two ferromagnetic layers. Since TMR shows a very large change in resistance and good sensitivity, it is promising as a boost spin valve GMR.
- the GMR with the CPP structure has the feature that the output increases when the cross-sectional area of the part where the sense current of the GMR film passes decreases. I have. This is a significant advantage of CIP-structured GMR.
- TMR can be considered as a kind of CPP structure because current passes from one ferromagnetic layer across the insulating layer to the other ferromagnetic layer, and the advantage described above is the same. .
- An MR head using an MR film (hereinafter, the term “MR” includes GMR in this specification) has a problem that if the MR film is not a single magnetic domain, Barkhausen noise occurs and the reproduction output fluctuates greatly. . For this reason, a magnetic domain control film is provided to control the magnetic domains of the MR film.
- a high coercive force film such as CoPt
- an antiferromagnetic film such as PdPtMn
- the sense current flows in the direction perpendicular to the film surface of the MR film, so the current magnetic field due to this sense current circulates in the film surface of the MR film 2 as shown in Figure 1A.
- Magnetic domain control films 4 are provided on both sides of the MR film 2.
- P indicates an end of the free layer of the MR film 2 facing the medium.
- the direction of the Piase magnetic field by the magnetic domain control film 4 for suppressing the generation of magnetic domains in the free layer of the MR film and stabilizing the magnetization direction is roughly in the direction of the track width as shown by the arrow 6 in FIG. 1B. Is facing.
- the sense current is applied to the current magnetic field due to the sense current and the magnetic domain control film at the medium facing end (the end on the air bearing surface side) of the MR film.
- a bias magnetic field caused by the current flows in the opposite direction.
- the sense current direction in which the current magnetic field and the bias magnetic field are in opposite directions is referred to as a negative direction.
- the sense current direction such that the current magnetic field and the bias magnetic field are in the same direction is defined as the positive direction.
- the hard magnetic film is disposed on both sides of the MR film, so that in a CPP structure magnetoresistive head, a sense current shunts to the hard magnetic film. It is necessary to have a structure in which the MR film and the hard magnetic film are separated and insulated to prevent is there. When the MR film and the hard magnetic film are separated in this way, the bias magnetic field from the hard magnetic film on the free layer of the MR film is extremely reduced. Therefore, when the sense current flows in the negative direction, the effect of controlling the magnetic domain in the free layer is further reduced. Disclosure of the invention
- an object of the present invention is to provide a magnetoresistive head capable of enhancing the effect of controlling the magnetic domain of the free layer of the MR film and suppressing the generation of Parkhausen noise.
- a magnetoresistive head for detecting a magnetic signal of a recording medium as a reproduction signal, comprising: a first magnetic shield; and a first electrode disposed on the first magnetic shield. A terminal; a magnetoresistive film disposed on the first electrode terminal; and applying a bias magnetic field in a first direction to the magnetoresistive film disposed on both sides of the magnetoresistive film to form the magnetoresistive film.
- a magnetic domain control film for controlling a magnetic domain, a second electrode terminal disposed on the magnetoresistive film, a second magnetic shield disposed on the second electrode terminal, and a medium facing end of the magnetic resistance film Means for flowing a sense current in a direction perpendicular to the film surface of the magnetoresistive film across the first and second electrode terminals so that the direction of the current magnetic field at the first direction is the first direction.
- a magnetoresistive head characterized by comprising:
- the magnetoresistive film includes at least one low-resistance film and at least two ferromagnetic films sandwiching the low-resistance film.
- the magnetoresistive film has a ferromagnetic tunnel junction structure or is composed of a multilayer structure of a ferromagnetic layer and a nonmagnetic layer.
- the magnetic domain control film is formed of a high coercivity film.
- At least one of the first and second electrode terminals may be configured to also serve as a magnetic shield.
- a magnetoresistive head for detecting a magnetic signal of a recording medium as a reproduction signal, comprising: a first magnetic shield; and a first electrode disposed on the first magnetic shield. A terminal, a magnetoresistive film disposed on the first electrode terminal, and applying a bias magnetic field in a first direction to the magnetoresistive film disposed on the first resistive film.
- a magnetic domain control film for controlling magnetic domains a second electrode terminal disposed on the magnetic domain control film, a second magnetic shield disposed on the second electrode terminal, and a medium facing end of the magnetoresistive film
- a sense current is passed across the first and second electrode terminals in a direction perpendicular to the film surface of the magnetoresistive film so that the direction of the current magnetic field in the portion is the first direction.
- a means for providing a magnetoresistive head comprising:
- the magnetic domain control film includes a nonmagnetic metal layer laminated on the magnetoresistive film, a ferromagnetic layer laminated on the nonmagnetic metal layer, and an antiferromagnetic layer laminated on the ferromagnetic layer. Contains. At least one of the first and second electrode terminals may be configured to also serve as a magnetic shield.
- a magnetoresistive head for detecting a magnetic signal of a recording medium as a reproduction signal, comprising: a first magnetic shield; and a first magnetic shield disposed on the first magnetic shield.
- a magnetoresistive head comprising: means for flowing a sense current in a direction perpendicular to the film surface of the magnetoresistive film across the first and second electrode terminals.
- the magnetic domain control film includes an antiferromagnetic layer scraped on the first electrode, a ferromagnetic layer stacked on the antiferromagnetic layer, and a nonmagnetic metal layer stacked on the ferromagnetic layer. Is included. At least one of the first and second electrode terminals may be configured to also serve as a magnetic shield.
- Figure 1A shows the current magnetic field distribution in the magnetoresistive head of a conventional CPP structure using a hard magnetic film as the magnetic domain control film:
- Figure 1B shows the direction of the bias magnetic field due to the hard magnetic film in a conventional CPP structure magnetoresistive head
- FIG. 2 is a schematic perspective view of the magnetoresistive head according to the first embodiment of the present invention.
- FIG. 3A is a diagram showing a current magnetic field distribution of the magnetoresistive head of the first embodiment
- FIG. 3B is a diagram showing a bias magnetic field direction by the hard magnetic film in the magnetoresistive head of the first embodiment
- FIG. 4A shows the isolated regenerative wave type when the sense current flows in the positive direction
- FIG. 4B is a diagram showing an isolated reproduction wave type when a sense current flows in the negative direction
- FIGS. 5A to 9C are diagrams showing a manufacturing process of the magnetoresistive head according to the first embodiment of the present invention
- FIG. 10 is a schematic perspective view of a magnetoresistive head according to a second embodiment of the present invention.
- FIG. 11 is a schematic perspective view of a magnetoresistive head according to a third embodiment of the present invention.
- FIG. 12A shows a current magnetic field distribution in the magnetoresistive head according to the second embodiment of the present invention
- FIG. 12B is a diagram showing a bias magnetic field direction by the antiferromagnetic film in the magnetoresistive head of the second embodiment
- FIGS. 13A to 17C are diagrams showing a manufacturing process of the magnetoresistive head according to the second embodiment of the present invention.
- FIG. 2 there is shown a schematic perspective view of the magnetoresistive head 10 according to the first embodiment of the present invention.
- the upper and lower magnetic shields are omitted.
- Reference numeral 12 denotes a lower electrode terminal formed of Cu or a combination of Cu and Au, and has a first width in the X direction.
- a magnetoresistive film (MR film) 14 is laminated on the lower electrode terminal 12.
- the MR film 14 has a second width narrower than the first width.
- Magnetic domain control films 18 are arranged on both sides of the MR film 14.
- the MR film 14 and the magnetic domain control film 18 are spaced apart from each other with a predetermined gap, thereby preventing a shunt current from the MR film 14 to the magnetic domain control film 18.
- a high coercive force film such as CoCrPt can be used as CoCrPt.
- an upper electrode terminal 16 formed of Cu or a combination of Cu and Au is laminated on the MR film 14.
- the upper electrode terminal 16 has a second width substantially equal to the width of the MR film 14.
- the portion of the MR film 14 that is not reinforced by the upper electrode terminal 16 functions as a back yoke for guiding magnetic flux.
- the width of the upper electrode terminal 16 is substantially the same as the width of the MR film 14, but the lower electrode terminal 1
- the width of 2 is formed wider than the width of MR film 14. Therefore, since the current concentration of the sense current occurs near both sides of the MR film 14, the cross-sectional area of the sense current flowing through the MR film 14 can be reduced. As a result, a high reproduction output can be obtained.
- the width of the upper electrode terminal 16 may be narrower than the width of the MR film 14.
- the MR film 14 includes at least one low-resistance film and at least two ferromagnetic films sandwiching the low-resistance film.
- the MR film 14 has a ferromagnetic tunnel junction structure or is composed of a multilayer film structure of a ferromagnetic layer and a nonmagnetic layer.
- the MR film 14 is a spin valve GMR film such as NiFeZCu / NiFeZlr Mn, NiFe / Cu / CoFeB / Ru / C o F e B / P d P t M n stacked such full; Risupinbarubu GMR film, n i F e / a 1 2 0 3 / n i F e / P d P t Mn Bok tunnel junction such as MR A film (TMR film) can be used.
- TMR film MR A film
- the magnetic domain control film 18 is magnetized so as to apply a bias magnetic field in the direction of arrow 20. Further, in the magnetoresistive head 10 of the present embodiment, the power supply 22 crosses the electrode terminals 12 and 16 in the direction indicated by an arrow 24 which is perpendicular to the film surface of the MR film 14. Is shed. The direction of this sense current is important and will be further described with reference to FIGS. 3A and 3B. As shown in Fig. 3A, in the magnetoresistive head of the CPP structure, since the sense current flows in the direction perpendicular to the film surface of the MR film 14, the current magnetic field due to this sense current is It is the direction of orbit in the plane. In FIG.
- the arrow P indicates the edge of the MR film 14 facing the medium of the free layer.
- the direction of the bias magnetic field by the magnetic domain control film 18 is the direction shown by the arrow 20.
- the bias magnetic field direction 20 and the medium facing end of the MR film 14 are used.
- FIG. 4A shows an isolated regenerative waveform when the sense current flows in the positive direction
- FIG. 4B shows an isolated regenerative waveform when the sense current flows in the negative direction
- the asymmetry of the regenerative wave can be expressed by (V1-V2) / (V1 + V2) X100 (%). If the sense current flows in the positive direction, As shown in Fig. 4A, the asymmetry of the regenerative wave type is 5.6%, and when the sense current flows in the negative direction, Thus, the asymmetry of the regenerative wave type was 7.4%. Therefore, when the sense current flows in the positive direction, the asymmetry of the regenerative wave type is improved.
- the magnetic domain control effect of the free layer is enhanced by flowing a sense current at the end of the free layer facing the medium so that the current magnetic field and the bias magnetic field by the magnetic domain control film 18 are in the same direction. And the occurrence of Parkhausen noise can be suppressed. As a result, a good reproduced signal can be obtained.
- FIGS. 5A to 9A are cross-sectional views of the center of the terminal width in the MR element height direction
- FIGS. 5B to 9B are cross-sectional views of the center of the terminal height in the width direction of the MR element (track width direction).
- 5C to 9C are plan views of FIGS. 5B to 9B. Also not a, Remind as in FIG.
- the lower electrode terminal 12, the MR film 14, and the upper electrode terminal 16 are patterned into a desired shape.
- the photo resist 32 is uniformly applied, the photo resist 32 is patterned into a desired shape.
- the photoresist 32 may be shorter in the height direction than the upper electrode terminal 16 as shown by the dotted line in FIG. 7A.
- a part of the upper electrode terminal 16, the MR film 14, and the lower electrode terminal 12 is etched by ion milling or the like.
- the surface position of the magnetic domain control film 18 to be formed later is set to be equal to or higher than the lower position of the upper electrode terminal 16, and the lower position of the magnetic domain control film 18 is set to the MR film. It is desirable to etch so that it is lower or equal to the lower position of 14.
- the surface position of the magnetic domain control film 18 is higher or equal to the lower position of the upper electrode terminal 16, and the lower position of the magnetic domain control film 18 is lower or equal to the lower position of the MR film 14. If so, the lower electrode terminal 12 need not be etched.
- the photo resist 32 is located at the dotted line as shown in FIG. 7A, the height of the MR film 14 is smaller than the height of the lower electrode terminal 12 in the height direction. May be.
- a nonmagnetic insulating film 34 is formed without removing the photoresist 32. Is an insulating film can be used A 1 2 0 3 and the like.
- a magnetic domain control film 18 is formed without removing the photoresist 32.
- a high coercive force film such as CoCrPt can be used.
- the photoresist 32 is patterned into a desired shape.
- the width of the photo resist 32 should be equal to or smaller than the width of the upper electrode terminal 16.
- the upper electrode terminal 16 is etched by ion milling or the like. At this time, if the width of the photo resist 32 is smaller than the width of the upper electrode terminal 16, the width of the upper electrode terminal 16 becomes smaller than that of the MR film 14. Or the resolution in the track width direction is increased, so that good reproduction characteristics can be obtained.
- an insulating film 38 is formed. This state is shown in FIGS. 8A to 8C.
- the insulating film 38 and the upper electrode terminal 16 are etched by ion milling or the like.
- the domain control film 18 and the upper electrode terminal 16 are formed by the photo resist 32 before forming the insulating film 38 formed in FIGS. 8A to 8C.
- the insulating film 38 may be formed.
- the magnetic domain control film 18 and the upper magnetic shield 40 are not brought into contact with each other, etching by ion milling of the insulating film 38 and the upper electrode terminal 16 is unnecessary.
- an upper magnetic shield 40 made of NiFe is formed.
- the magnetic shields 30 and 40 and the electrode terminals 12 and 16 are formed by plating or vapor deposition, and the MR film 14, the magnetic domain control film 18 and the insulating films 34 and 38 are sputtered.
- the film is formed by a ring method or the like. With the magnetoresistive head 10 described above, the magnetic domain control film 18 is in electrical contact with one of the magnetic shields 30 and 40 or one of the electrode terminals 12 and 16. It is acceptable, but do not make electrical contact with both electrodes 12 and 16 or both magnetic shields 30 and 40 which also serve as electrodes.
- FIG. 10 a schematic perspective view of a magnetoresistive head 10A according to a second embodiment of the present invention is shown.
- the upper and lower magnetic shields are omitted.
- the magnetic domain control film 42 is disposed on the MR film 14, and the upper electrode terminal 16 is disposed on the magnetic domain control film 42.
- the MR film 14 has a free layer located on the upper side, and the magnetic domain control film 42 has a non-magnetic metal layer such as Ta, Cu, etc. laminated on the free layer of the MR film 14 and this non-magnetic metal layer. It includes a ferromagnetic layer such as CoFeB and NiFe laminated on the magnetic metal layer, and an antiferromagnetic layer such as PdPtMn laminated on the ferromagnetic layer.
- the arrow 44 indicates the direction of the bias magnetic field due to the antiferromagnetic layer, and the direction of the current magnetic field at the medium facing end P of the MR film 14 shown in FIG. 12A is the bias shown in FIG. 12B.
- a sense current is caused to flow in the direction perpendicular to the film surface of the MR film 14, that is, in the direction of the arrow 24, so as to match the direction 44 of the magnetic field.
- the effect of controlling the magnetic domain of the free layer of the MR film 14 can be enhanced, and Barkhausen noise can be suppressed. As a result, a good reproduced signal can be obtained.
- FIG. 11 is a schematic perspective view of a magnetoresistive head 10B according to a third embodiment of the present invention.
- the magnetic domain control film 42 ' is arranged between the lower electrode terminal 12 and the MR film 14'.
- the MR film 14 ' has a free layer on the lower side.
- the magnetic domain control film 4 2 ′ is composed of an antiferromagnetic layer such as PdPtMn laminated on the lower electrode terminal 12, and CoFeB, NiFe which are laminated on the antiferromagnetic layer. , And nonmagnetic metal layers such as Ta and Cu laminated on the ferromagnetic layer.
- the direction of the current magnetic field at the medium facing end P of the MR film 14 ′ is changed by the bias magnetic field in the MR film 14 ′ by the magnetic domain control film 42 ′.
- the effect of controlling the magnetic domain of the MR film 14 ′ can be enhanced and the generation of Barkhausen noise can be suppressed. As a result, a good reproduced signal can be obtained.
- FIGS. 13A to 17C are cross-sectional views in the height direction of the MR element at the center of the terminal width.
- Figs. 13B to 17B are cross sections in the width direction of the MR element (track width direction) at the center of the terminal height.
- Sectional views, FIGS. 13C to 17C are plan views of FIGS. 13B to 17B.
- a l 2 Rei_3- T i C underlayer 2 8 consisting of A 1 2 ⁇ 3 on the substrate 2 6,
- N i consists F e lower magnetic seal 30, lower electrode terminal 12, MR film 14, non-magnetic metal layer such as Ta, Cu and ferromagnetic layer such as CoFeB, NiFe, and PdPtMn etc.
- a laminated film (domain control film) 42 including an antiferromagnetic layer and an upper electrode terminal 16 are sequentially formed.
- the nonmagnetic metal layer / ferromagnetic layer / antiferromagnetic layer laminated film (magnetic domain control film) 42 is formed by, for example, a free layer so that the free layer of the MR film and the nonmagnetic metal layer are laminated.
- the layer is located below the middle layer of the MR film, the antiferromagnetic layer, the non-ferromagnetic layer, the nonmagnetic metal layer, and the free layer of the MR film are sequentially laminated.
- the free layer is on the upper side of the MR film, the free layer of the MR film / non-magnetic metal layer / ferromagnetic layer Z is formed so as to be sequentially laminated with the antiferromagnetic layer.
- the free layer is on the upper side in the MR film will be described.
- the lower electrode terminals 1 and 2 are not formed
- the MR film 14 includes at least one resistance film and at least two ferromagnetic films sandwiching the low resistance film.
- the MR film 14 has a ferromagnetic tunnel junction structure or is composed of a multilayer film structure of a ferromagnetic layer and a nonmagnetic layer.
- the MR film 14 is a spin-pulse GMR film such as NiFe / Cu / NiFe / lrMn, iFe / Cu / CoFeB / Ru'C o F e B / P d P t M n like stacked full re-spin valve GMR film, n i F e / a 1 2 0 ⁇ / ⁇ i F e / P d P t Mn such a tunnel junction type MR film ( TMR film) can be used.
- TMR film tunnel junction type MR film
- the lower electrode terminal 12, the MR film 14, the magnetic domain control film 42, and the upper electrode terminal 16 are patterned into a desired shape.
- the photoresist 45 is uniformly applied, and then the photoresist 45 is patterned into a desired shape.
- the photo resist 45 may be shorter in height than the upper electrode terminal 16 as shown by the dotted line in FIG. 15A.
- a part of the upper electrode terminal 16, the magnetic domain control film 42, the MR film 14 and a part of the lower electrode terminal 12 are etched by ion milling or the like.
- the height of the MR film 14 may be smaller than the height of the lower electrode terminal 12 in the height direction.
- the photoresist 45 is patterned into a desired shape. Forrest
- the width of 4 5 should be equal to or smaller than the width of the upper electrode terminal 16
- the upper electrode terminal 16 is etched by ion milling or the like.
- an insulating film 46 is formed. This state is shown in FIGS. 16A to 16C.
- an upper magnetic shield 40 made of NiFe is deposited as shown in FIGS. 17A to 17C.
- the magnetic shields 30 and 40 and the electrode terminals 12 and 16 are formed by plating or vapor deposition, and the MR film 14, the magnetic domain control film (laminated film) 42 and the insulating film 46 are sputtered.
- the film is formed by a plating method or the like.
- an antiferromagnetic layer for fixing the magnetization of the ferromagnetic layer to one free layer in the MR film 14 and a bias magnetic field are applied to one free layer of the MR film.
- Anti-ferromagnetic layers are used for this purpose.
- the magnetization pinning directions of these two antiferromagnetic layers differ by about 90 degrees. Therefore, by using two antiferromagnetic layers having different blocking temperatures, the magnetization fixed direction can be changed by about 90 degrees by changing the applied magnetic field by about 90 degrees during the heat treatment. .
- a sense current is caused to flow so that the direction of a current magnetic field at the medium facing end of a free layer of an MR film is the same as the direction of a bias magnetic field by a magnetic domain control film.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Magnetic Heads (AREA)
- Hall/Mr Elements (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004569104A JPWO2004079723A1 (ja) | 2003-03-06 | 2003-03-06 | 磁気抵抗ヘッド |
PCT/JP2003/002659 WO2004079723A1 (ja) | 2003-03-06 | 2003-03-06 | 磁気抵抗ヘッド |
EP03816164A EP1600948A4 (en) | 2003-03-06 | 2003-03-06 | MAGNETORESISTIC HEAD |
AU2003211748A AU2003211748A1 (en) | 2003-03-06 | 2003-03-06 | Magneto-resistive head |
CN03823246.4A CN1685398A (zh) | 2003-03-06 | 2003-03-06 | 磁致电阻头 |
US11/093,514 US20050168877A1 (en) | 2003-03-06 | 2005-03-30 | Magnetoresistive head |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2003/002659 WO2004079723A1 (ja) | 2003-03-06 | 2003-03-06 | 磁気抵抗ヘッド |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/093,514 Continuation US20050168877A1 (en) | 2003-03-06 | 2005-03-30 | Magnetoresistive head |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004079723A1 true WO2004079723A1 (ja) | 2004-09-16 |
Family
ID=32948268
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2003/002659 WO2004079723A1 (ja) | 2003-03-06 | 2003-03-06 | 磁気抵抗ヘッド |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1600948A4 (ja) |
JP (1) | JPWO2004079723A1 (ja) |
CN (1) | CN1685398A (ja) |
AU (1) | AU2003211748A1 (ja) |
WO (1) | WO2004079723A1 (ja) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002171013A (ja) * | 2000-12-04 | 2002-06-14 | Sony Corp | 磁気抵抗効果素子および磁気抵抗効果型磁気ヘッド |
JP2002232033A (ja) * | 2001-02-01 | 2002-08-16 | Toshiba Corp | 磁気抵抗効果素子の製造方法 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5898547A (en) * | 1997-10-24 | 1999-04-27 | International Business Machines Corporation | Magnetic tunnel junction magnetoresistive read head with sensing layer as flux guide |
US6023395A (en) * | 1998-05-29 | 2000-02-08 | International Business Machines Corporation | Magnetic tunnel junction magnetoresistive sensor with in-stack biasing |
US6097579A (en) * | 1998-08-21 | 2000-08-01 | International Business Machines Corporation | Tunnel junction head structure without current shunting |
JP3647736B2 (ja) * | 2000-09-29 | 2005-05-18 | 株式会社東芝 | 磁気抵抗効果素子、磁気ヘッド及び磁気再生装置 |
US6473279B2 (en) * | 2001-01-04 | 2002-10-29 | International Business Machines Corporation | In-stack single-domain stabilization of free layers for CIP and CPP spin-valve or tunnel-valve read heads |
US6724582B2 (en) * | 2001-01-19 | 2004-04-20 | Kabushiki Kaisha Toshiba | Current perpendicular to plane type magnetoresistive device, magnetic head, and magnetic recording/reproducing apparatus |
-
2003
- 2003-03-06 CN CN03823246.4A patent/CN1685398A/zh active Pending
- 2003-03-06 JP JP2004569104A patent/JPWO2004079723A1/ja active Pending
- 2003-03-06 EP EP03816164A patent/EP1600948A4/en not_active Withdrawn
- 2003-03-06 AU AU2003211748A patent/AU2003211748A1/en not_active Abandoned
- 2003-03-06 WO PCT/JP2003/002659 patent/WO2004079723A1/ja not_active Application Discontinuation
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002171013A (ja) * | 2000-12-04 | 2002-06-14 | Sony Corp | 磁気抵抗効果素子および磁気抵抗効果型磁気ヘッド |
JP2002232033A (ja) * | 2001-02-01 | 2002-08-16 | Toshiba Corp | 磁気抵抗効果素子の製造方法 |
Non-Patent Citations (1)
Title |
---|
See also references of EP1600948A4 * |
Also Published As
Publication number | Publication date |
---|---|
JPWO2004079723A1 (ja) | 2006-06-08 |
EP1600948A1 (en) | 2005-11-30 |
AU2003211748A1 (en) | 2004-09-28 |
CN1685398A (zh) | 2005-10-19 |
EP1600948A4 (en) | 2007-10-31 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP4177954B2 (ja) | 磁気トンネル接合積層型ヘッド及びその製法 | |
JP2004095110A (ja) | 部分的な電流絞込層を備えたスピンバルブ型磁気ヘッド及びその製造方法、ならびにその電流絞込方法 | |
JP3703348B2 (ja) | スピンバルブ型薄膜素子とそのスピンバルブ型薄膜素子を備えた薄膜磁気ヘッド | |
US7606008B2 (en) | Stabilizer for magnetoresistive head and method of manufacture | |
US20090080125A1 (en) | Magnetic head | |
US7092218B2 (en) | Magnetic head comprising magnetic domain control layer formed on ABS-side of magnetic flux guide for GMR element and method of manufacturing the magnetic head | |
JP4185528B2 (ja) | 薄膜磁気ヘッド | |
JP2001250208A (ja) | 磁気抵抗効果素子 | |
JP2001110016A (ja) | スピンバルブ型薄膜磁気素子およびその製造方法、およびこのスピンバルブ型薄膜磁気素子を備えた薄膜磁気ヘッド | |
JP2005209301A (ja) | 磁気ヘッド及びその製造方法 | |
US7079362B2 (en) | Giant magnetoresistive element | |
KR20080055636A (ko) | 자기 저항 효과 소자, 자기 헤드 및 자기 기억 장치 | |
US6483674B1 (en) | Spin valve head, production process thereof and magnetic disk device | |
JP2001134910A (ja) | 磁気抵抗センサ及び薄膜磁気ヘッド | |
JP2006179566A (ja) | 磁気抵抗効果素子、該磁気抵抗効果素子を備えた薄膜磁気ヘッド、該薄膜磁気ヘッドを備えたヘッドジンバルアセンブリ、該ヘッドジンバルアセンブリを備えた磁気ディスク装置、及び該磁気抵抗効果素子の製造方法 | |
JP2000348309A (ja) | スピンバルブ型薄膜磁気素子及び薄膜磁気ヘッド及びスピンバルブ型薄膜磁気素子の製造方法 | |
JP3984839B2 (ja) | 磁気抵抗効果ヘッド | |
JP2001160208A (ja) | 磁気抵抗効果素子及びその製造方法 | |
JP2001052315A (ja) | スピンバルブ型薄膜磁気素子及び薄膜磁気ヘッド及びスピンバルブ型薄膜磁気素子の製造方法 | |
JP2009064528A (ja) | 磁気抵抗効果ヘッド及びその製造方法 | |
JP3474523B2 (ja) | 薄膜磁気ヘッドおよびその製造方法 | |
JP4283169B2 (ja) | 磁気抵抗ヘッド | |
JP2002329903A (ja) | 磁気検出素子及びその製造方法 | |
JPH09270544A (ja) | 巨大磁気抵抗効果素子 | |
JP2006261259A (ja) | 磁気抵抗効果素子、磁気抵抗効果素子の製造方法及び磁気ヘッド、磁気情報再生装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ OM PH PL PT RO RU SC SD SE SG SK SL TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 2004569104 Country of ref document: JP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1020057004369 Country of ref document: KR |
|
WWE | Wipo information: entry into national phase |
Ref document number: 20038232464 Country of ref document: CN |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2003816164 Country of ref document: EP Ref document number: 11093514 Country of ref document: US |
|
WWP | Wipo information: published in national office |
Ref document number: 1020057004369 Country of ref document: KR |
|
WWP | Wipo information: published in national office |
Ref document number: 2003816164 Country of ref document: EP |
|
WWW | Wipo information: withdrawn in national office |
Ref document number: 2003816164 Country of ref document: EP |