WO2004025745A1 - 磁気抵抗効果素子およびこの製造方法並びに使用方法 - Google Patents
磁気抵抗効果素子およびこの製造方法並びに使用方法 Download PDFInfo
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- WO2004025745A1 WO2004025745A1 PCT/JP2003/011687 JP0311687W WO2004025745A1 WO 2004025745 A1 WO2004025745 A1 WO 2004025745A1 JP 0311687 W JP0311687 W JP 0311687W WO 2004025745 A1 WO2004025745 A1 WO 2004025745A1
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N50/00—Galvanomagnetic devices
- H10N50/10—Magnetoresistive devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
- G01R33/06—Measuring direction or magnitude of magnetic fields or magnetic flux using galvano-magnetic devices
- G01R33/09—Magnetoresistive devices
- G01R33/093—Magnetoresistive devices using multilayer structures, e.g. giant magnetoresistance sensors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y25/00—Nanomagnetism, e.g. magnetoimpedance, anisotropic magnetoresistance, giant magnetoresistance or tunneling magnetoresistance
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F10/00—Thin magnetic films, e.g. of one-domain structure
- H01F10/32—Spin-exchange-coupled multilayers, e.g. nanostructured superlattices
- H01F10/3227—Exchange coupling via one or more magnetisable ultrathin or granular films
- H01F10/3231—Exchange coupling via one or more magnetisable ultrathin or granular films via a non-magnetic spacer
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F10/00—Thin magnetic films, e.g. of one-domain structure
- H01F10/32—Spin-exchange-coupled multilayers, e.g. nanostructured superlattices
- H01F10/3227—Exchange coupling via one or more magnetisable ultrathin or granular films
- H01F10/3231—Exchange coupling via one or more magnetisable ultrathin or granular films via a non-magnetic spacer
- H01F10/3236—Exchange coupling via one or more magnetisable ultrathin or granular films via a non-magnetic spacer made of a noble metal, e.g.(Co/Pt) n multilayers having perpendicular anisotropy
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/32—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for applying conductive, insulating or magnetic material on a magnetic film, specially adapted for a thin magnetic film
Definitions
- the present invention relates to a magneto-resistance effect element used for a sensor or the like, particularly to a magneto-resistance effect element utilizing a giant magneto-resistance effect, and a method of manufacturing and using the same.
- the magnetoresistive element has a characteristic that the resistance value changes according to the change in the direction and strength of the magnetic field.
- a magnetoresistive effect element provided with a pier magnet is connected in series to apply a voltage, and a change in the voltage at the midpoint is detected by an external circuit.
- a rotation detection sensor that detects the number of rotations of the rotating body by performing signal processing together with the rotation detection sensor.
- the magnetoresistive element examples include a Hall IC having a Hall element and a control circuit formed on a semiconductor substrate, and a ferromagnetic material such as a nickel-iron alloy (Ni-Fe) or a nickel-cobalt alloy (Ni-Co).
- a ferromagnetic material such as a nickel-iron alloy (Ni-Fe) or a nickel-cobalt alloy (Ni-Co).
- Ni-Fe nickel-iron alloy
- Ni-Co nickel-cobalt alloy
- a semiconductor magnetoresistance element such as indium antimony (InSb).
- a giant magnetoresistive element GMR element
- MMR element giant magnetoresistive element has a configuration in which magnetic thin films having a thickness of only a few nm and nonmagnetic metal thin films are alternately stacked. Have been used for rotation detection sensors and position detection sensors.
- a magnetoresistive element not only a structure in which a magnetic film and a metal non-magnetic thin film are laminated, but also various structures have been proposed.
- a method of manufacturing a magnetoresistive element having a metal artificial lattice film structure in which the above-described magnetic film and metal non-magnetic thin film are laminated will be briefly described.
- a magnetic thin film and a metal non-magnetic thin film are laminated on a substrate by sputtering or the like, and a metal artificial lattice film having a predetermined pattern is formed by photolithography and an etching process. Electrodes for applying a voltage are formed at both ends of the metal artificial lattice film, and electrodes for extracting a midpoint potential are formed at the center. Furthermore, a protective film is provided so as to cover the metal artificial lattice film on which the electrodes are formed. Then, a magnetoresistive element is manufactured. When the magnetic thin film and the metal non-magnetic thin film are set to an appropriate thickness, antiferromagnetic coupling acts between adjacent magnetic thin films via the metal non-magnetic thin film.
- the magnetization directions of the magnetic thin films are opposite to each other.
- a magnetic field is applied in parallel to the surface of the metal artificial lattice film, the direction of magnetization of the magnetic thin film becomes the same as the direction of the applied magnetic field, and the resistance value of the metal artificial lattice film decreases.
- it is used as a sensor.
- a metal artificial lattice film assembled in a half bridge or full bridge and a permanent magnet for applying a bias magnetic field are installed close to a magnetic rotating body with irregularities formed at regular intervals on the circumference like a gear.
- the direction of the magnetic field of the permanent magnet changes according to the unevenness, so that the direction and magnitude of the magnetic field applied to the metal artificial lattice film change.
- the resistance value of the metal artificial lattice film changes according to this change, the voltage at the middle point of the bridge changes. By processing this voltage change by a processing circuit connected to the outside, it can be extracted as a pulse-like signal, whereby the rotation speed can be detected.
- Magnetoresistive elements that use the giant magnetoresistance effect are promising as automotive sensors because of their large magnetoresistance change rate.
- the high temperature of the magnetically sensitive film that directly exhibits the magnetoresistive effect is required.
- Ni nickel
- Co Cobalt
- Fe iron
- Eckel Ni
- Japanese Patent Application Laid-Open No. H10-326919 discloses that a polyimide is used as a protective film in a magnetoresistive element using a magnetosensitive film exhibiting a giant magnetoresistance effect. It also states that by changing the thickness of the polyimide, the stress applied to the magnetic film (magnetoresistive film) can be changed. Further, polyimide and the magnetic layer (magnetoresistive film) between the silicon dioxide (S io 2) and alumina (A 1 2 0 3) a thin film layer provided magnetic film such as (magnetoresistive film) doubly Protection is also described.
- the present inventors have found that when a magnetoresistive element having a conventional configuration is used, the magnetoresistance change rate is significantly reduced in a high-temperature atmosphere of about 150 ° C as compared with room temperature. . Furthermore, they found that the resistance value changes with time when stored or used at such a high temperature for a long time. Disclosure of the invention
- An object of the present invention is to provide a magnetoresistance effect element having good heat resistance and a large magnetoresistance change rate based on the above findings.
- a magnetoresistive element includes a substrate, a metal lattice film formed in a predetermined pattern by alternately laminating two or more magnetic thin films and metal non-magnetic thin films on a part of the substrate.
- a first protective film is formed on the substrate by covering the metal artificial lattice film, and a second protective film is formed on the first protective film.
- the first protective film has residual stress. It is substantially zero, and the second protective film is made of a material having a water permeation blocking ability.
- the magnetic thin film is made of nickel
- the magnetoresistance effect element of the present invention is a metal artificial lattice film comprising a substrate, at least two layers of a magnetic thin film and a metal non-magnetic thin film laminated on a part of the substrate, and formed in a predetermined pattern shape.
- the magnetic thin film is composed of Eckel (Ni), iron (Fe), and cobalt (Co), and the composition ratio depends on the number of atoms.
- nickel (N i) is 1-5 atoms 0/0
- cobalt (C o) is 50 to 95 atomic%, a configuration in which the alloy film balance of iron (F e).
- the rate of change in magnetoresistance does not deteriorate even at high temperatures, and the change over time in characteristics can be extremely reduced. It is presumed that this is because the nickel (N i) composition ratio can be reduced to suppress nickel (N i) diffusion, which tends to occur at high temperatures.
- the magnetoresistive element of the present invention is characterized in that, in the above-described configuration, the metal non-magnetic thin film is made of either copper (Cu) or silver (Ag). As a result, the magnetoresistance ratio can be increased, and a magnetoresistive element capable of obtaining a sufficient output can be realized.
- the magnetoresistive element of the present invention includes a first protective film formed on a substrate including a protective film on a metal artificial lattice film, and a second protective film formed on the first protective film.
- the first protective film has substantially no residual stress
- the second protective film is made of a material having a moisture permeation blocking ability.
- the magnetoresistive element of the present invention the first protective film monoxide Kei element (S io), silicon dioxide (S I_ ⁇ 2), nitride Kei element (S i N x) or oxynitride Kei-containing ( S i ON), and the second protective film is made of polyimide.
- the magnetoresistive element of the present invention the first protective film monoxide Kei element (S io), silicon dioxide (S I_ ⁇ 2), nitride Kei element (S i N x) or oxynitride Kei-containing ( S i ON)
- the second protective film is made of polyimide.
- the magnetoresistance effect element of the present invention is characterized in that the magnetostriction of the magnetic thin film is zero. As a result, it is possible to prevent the occurrence of hysteresis caused by the magnetic thin film, and to realize a magnetoresistive element having stable characteristics even at a high temperature.
- the magnetoresistive element of the present invention is characterized in that the substrate is made of ceramics. As a result, an inexpensive magnetoresistive element suitable for use at high temperatures can be realized.
- the magnetoresistive element of the present invention has a configuration in which the substrate is a glazed ceramic substrate in which glass is glazed, and the metal artificial lattice film is formed on a glass layer.
- the substrate is a glazed ceramic substrate in which glass is glazed, and the metal artificial lattice film is formed on a glass layer.
- the magnetoresistance effect element of the present invention is characterized in that sodium ions (N a +), potassium ion (K +), and chloride ion (C 1 ⁇ ) are characterized by being less than 10 ppm. As a result, it is possible to prevent changes in the resistance value and the magnetic properties of the metal artificial lattice film due to the mixing of these ions.
- the mixed amount of sodium ion (Na +), potassium ion (K +), and chloride ion (C1-) contained in the first protective film is 10 pmm or less. It is characterized by. As a result, it is possible to prevent changes in the resistance value and the magnetic properties of the metal artificial lattice film due to the mixing of these ions.
- a metal artificial lattice film having a predetermined pattern is formed by alternately laminating two or more magnetic thin films and metal non-magnetic thin films on a part of a substrate. Forming a first protective film that covers the metal artificial lattice film on the substrate and has substantially no residual stress, and has an ability to block moisture permeation on the first protective film. Forming a second protective film. This makes it possible to manufacture a magnetoresistive element that has excellent corrosion resistance and does not cause hysteresis due to the protective film.
- the magnetic thin film constituting the metal artificial lattice film is an alloy comprising nickel (Ni), cobalt (Co) and iron (Fe), and The composition ratio according to the number of atoms is 1-5 atoms of nickel (Ni). /.
- the cobalt (Co) is 50-95%, the balance is iron (Fe), and the metal non-magnetic film is copper (Cu) or silver (Ag). Become. This makes it possible to obtain a magnetoresistive element having excellent heat resistance and erosion resistance and free from at least hysteresis caused by the first protective film.
- the step of forming the first protective film includes setting the substrate temperature in the range of 200 ° C. to 250 ° C. by a sputtering method or an evaporation method, and V of silicon (S i 0), silicon dioxide (S i 0 2 ), silicon nitride (S i N x ), or silicon nitride oxide (S i ON).
- the magnetoresistance effect element of the present invention is characterized in that it is used in an environment of 150 ° C. or higher. As a result, even at high temperatures, a resistance change rate equivalent to that at room temperature can be obtained. In addition, the change with time of the characteristics of the metal artificial lattice film can be reduced. .
- the method of using the magnetoresistive element of the present invention is a method of using the magnetoresistive element in an environment of 150 ° C. or more. Can be used.
- FIG. 1A is a plan view of a magnetoresistive element according to an embodiment of the present invention.
- Figure 1B shows a section along the line A-A shown in Figure 1A.
- FIG. 2 is a cross-sectional view for explaining a detailed structure of the metal artificial lattice film of the magnetoresistive element of the embodiment.
- FIG. 3 is a schematic diagram showing a magnetoresistive effect element manufactured in a bridge circuit configuration using four metal artificial lattice films of the same embodiment.
- FIG. 1A is a plan view of a magnetoresistive element according to an embodiment of the present invention
- FIG. 1B is a cross-sectional view taken along line AA shown in FIG. 1A
- FIG. 2 is a cross-sectional view for explaining a detailed structure of a metal artificial lattice film portion of the magnetoresistance effect element shown in FIGS. 1A and 1B.
- FIG. 1A, FIG. IB and FIG. 2 the same elements are denoted by the same reference numerals.
- the magnetoresistive element of the present embodiment has a structure in which a metal artificial lattice film formed by laminating a magnetic film and a metal nonmagnetic film is used as a magnetically sensitive film.
- the glass layer 2 is glazed on one surface of the plate-shaped substrate 1.
- any ceramics produced by sintering an oxide powder or a nitride powder such as alumina ceramics, zirconia ceramics, mixed ceramics of glass and alumina, and the like can be used.
- a silicon wafer, a glass plate, a quartz plate, or a ceramic plate which is sintered very densely and is in a mirror surface state can be used as the substrate 1.
- silicon is not an insulating material, it is used especially for high temperature such as for automobiles. In the case of using it, it is necessary to provide an insulating layer because the magnetoresistance effect is degraded due to a decrease in the resistance value of the substrate.
- Alumina ceramics is a suitable substrate because it can obtain a smooth surface by glazing the glass layer and is inexpensive.
- the glass layer 2 to be glazed is generally used as a material for glazing ceramic surfaces, such as lead borosilicate glass, alkali-free or lead-free borosilicate glass. Anything that does not include it can be used.
- the four extraction electrodes 3 are provided on the glass layer 2 of the substrate 1 and partially conduct with the metal artificial lattice film 4 to function as terminals for connecting to an external device (not shown).
- the extraction electrode 3 is preferably made of a nichrome (NiCr) alloy, but may be made of a material generally used as a wiring conductor, such as gold (Au), copper (Cu), nickel (Ni), or the like. Can be used.
- the metal artificial lattice film 4 is formed in a strip shape on the glass layer 2 and on a part of the extraction electrode 3 as shown in the figure, and is electrically connected to the extraction electrodes 3 provided at the four corners, respectively.
- the connection configuration as in the present embodiment is called a bridge circuit, and the detection method is performed as follows. In other words, the configuration is such that a voltage is applied to two electrodes 3 on a diagonal line and a differential output between the remaining two electrodes 3 is taken out as a voltage to detect a change in the magnetic field.
- the metal artificial lattice film 4 has a structure in which a magnetic thin film 7 and a metal non-magnetic thin film 8 are stacked.
- the magnetic thin film 7 and the metal non-magnetic thin film 8 are each laminated in two layers to form a four-layer structure, but the number of layers is not limited to this. .
- the number of layers may be three or more, and it is preferable that the number of layers is about 10 in order to increase the magnetoresistance ratio.
- the magnetic thin film 7 is an alloy made of nickel (Ni), iron (Fe), and cobalt (Co).
- the composition ratio is expressed in terms of atomic number%.
- Cobalt (C 0) is 50 atomic% to 95 atomic%
- nickel (Ni) is 1 atomic. /. Up to 5 atomic%, with the balance being iron (F e), is desirable in that the magnetoresistance ratio can be increased and the corrosion resistance can be improved.
- nickel (Ni) has one atom of 0 /. Good be a 1-4 atom 0/0. With this nickel (Ni) composition range, the aging characteristics are further improved. This is presumed to be due to the suppression of nickel (N i) diffusion in a high-temperature atmosphere. are doing.
- the metal non-magnetic thin film 8 is preferably made of copper (Cu) or silver (Ag).
- the metal artificial lattice film 4 is formed by laminating the magnetic thin film 7 and the metal non-magnetic thin film 8 and processing them into a predetermined pattern shape.
- the first protective film 5 is formed so as to cover the metal artificial lattice film 4, monoxide Ke I containing (S i 0), silicon (S i 0 2) dioxide, nitride Kei element (S i N x ) Or silicon nitride oxide (SiON).
- the first protective film 5 is formed such that the residual stress becomes zero by appropriately setting the temperature conditions at the time of film formation.
- the second protective film 6 is formed on the first protective film 5, and polyimide is a suitable material. However, any organic material used as a surface protective film for a semiconductor can be used. As shown in the figure, the first protective film 5 and the second protective film 6 are formed so as to cover almost only the metal artificial lattice film 4 in the present embodiment. Can be further reduced.
- the protective film When used for automobiles, it is required to withstand harsh environments. Under such conditions, the heat resistance is good in the case of using the conventionally used polyimide as the protective film, but the desired magnetoresistance change occurs due to hysteresis in the magnetoresistive element. I found that it would not be possible. This has been found to occur even when the metal artificial lattice film 4 is manufactured under the condition that the magnetostriction becomes zero so that hysteresis does not occur in the metal artificial lattice film 4 itself. Investigation of the cause revealed that residual stress was generated when the polyimide was cured, and that the metal artificial lattice film 4 was affected by this.
- the Supattaringuma other silicon dioxide (S i 0 2) for example, is formed by vapor deposition, usually resulting in compressive stress.
- the present inventors have found that the residual stress can be reduced to zero by setting the substrate temperature to 200 ° C. to 250 ° C. during film formation as described later. .
- the metal artificial lattice film 4 The applied stress can be reduced to zero.
- polyimide is used as the second protective film 6, for example, polyimide generates stress during curing, but this stress is absorbed by the first protective film 5, and the metal artificial lattice film 4 Practically has little effect. As a result, hysteresis caused by the protective film can be eliminated.
- stress is substantially reduced to zero
- a general stress measurement method such as a method of calculating the stress by measuring the warpage of the substrate.
- the metal artificial lattice film has a size that does not cause hysteresis.
- the second protective film 6 can be made of, for example, polyimide, the metal artificial lattice film 4 can be sufficiently protected even in a high-temperature and humid environment such as for an automobile, and the reliability of the magnetoresistive effect element is ensured. be able to.
- the surface of a ceramics such as alumina is glazed using a glass frit to prepare a substrate 1 on which a glass layer 2 is formed.
- An extraction electrode 3 is formed on the glass layer 2 of the substrate 1 by mask vapor deposition so as to have a pattern shape as shown in the drawing.
- the pattern of the extraction electrode 3 is complicated, a method of obtaining a predetermined pattern shape using a photolithography process and an etching process after depositing a thin film to be an extraction electrode on the entire surface without using a mask. Good.
- the thin film serving as the extraction electrode may be formed by sputtering.
- a magnetic thin film 7 and a metal non-magnetic thin film 8 are alternately stacked on the glass layer 2 while forming a predetermined thickness by sputtering so as to overlap a part of the extraction electrode 3. If the total number of layers is about 10 layers, a sufficient magnetoresistance change rate can be obtained.
- the metal artificial lattice film 4 is laminated in this way and is manufactured in a predetermined shape. It is necessary that the metal artificial lattice film 4 is not formed on the entire surface of the glass layer 2 but is formed in a predetermined pattern shape.
- a so-called mask film forming method in which these thin films are formed using a mask so that these thin films are formed in a predetermined pattern shape may be used.
- the etching color is formed into a predetermined pattern shape by a photolithography process and an etching process. May be used.
- the etching method not only wet etching and dry etching but also a method such as ion milling can be used.
- the first protective film 5 is formed.
- monoxide Kei containing Supattaringuma other by vapor deposition (S i O), silicon dioxide (S I_ ⁇ 2), nitride Kei element (S i N x) or oxynitride Kei element (S i ON) It is formed using one material selected from the following.
- the substrate temperature from 200 ° C. to 250 ° C. during the film formation, the internal residual stress can be reduced to zero.
- a second protective film 6 is formed on the first protective film 5.
- a structure in which a polyimide resin is used as a protective film can be obtained by applying a polyimide resin by spin coating and heating and curing at 300 ° C. By such a manufacturing method, the magnetoresistance effect element of the present embodiment is manufactured.
- the metal artificial lattice film 4 has a characteristic that the electric resistance value changes depending on the direction and magnitude of the applied magnetic field. Therefore, when the direction of the magnetic field or the magnitude of the magnetic field changes depending on the position of the detected member, the electric resistance value of the metal artificial lattice film 4 changes in accordance with the position of the detected member. As a result, the position of the detected member can be detected.
- metal artificial lattice films 4 are configured in a bridge circuit so as not to be affected by variations in resistance values in the absence of a magnetic field, resistance changes due to temperature, and the like.
- two metal artificial lattice films 4 may be connected in series to form a half-bridge circuit for extracting a midpoint potential.
- FIG. 3 is a diagram showing a magnetoresistive element manufactured in a bridge circuit configuration using four such metal artificial lattice films.
- one ends of the metal artificial lattice films 4a and 4b are commonly connected to the extraction electrode 3b.
- One end of each of the metal artificial lattice films 4c and 4d is similarly connected to the extraction electrode 3c.
- the other ends of the metal artificial lattice films 4a and 4c are commonly connected to each other, and are connected to the extraction electrode 3a.
- the other ends of the metal artificial lattice films 4b and 4d are commonly connected in common, and are connected to the extraction electrode 3d.
- this magnetoresistive effect element four metal artificial lattice films 4 are arranged on the glass layer 2 and are electrically connected to each other in a predetermined wiring pattern. You only need to be connected airly. At this time, the wiring pattern is made of the same material as that of the extraction electrode, and can be efficiently manufactured if manufactured at the same time. With such a bridge circuit configuration, it is possible to cancel temperature fluctuation and resistance value variation, so that high accuracy and temperature stability can be greatly improved.
- the magnetoresistive element of the present embodiment has a large magnetoresistance change rate and does not cause hysteresis even at a high temperature of about 150 ° C. Can be used with
- the substrate can absorb the external force and prevent the metal artificial lattice film from being stressed.
- rigid body is used as a term for “flexible body” and means a substance whose internal deformation due to an external force during normal use is practically negligible.
- the thickness of the glass layer to be glazed is not particularly limited as long as a smooth surface can be obtained. Since ceramics such as general alumina have relatively large surface irregularities, a thickness of 10 // m or more is required to obtain a smooth surface.
- a magnetoresistive element was manufactured using substrates with various thicknesses of glass layers, and a PCBT test was conducted in a high-temperature and high-humidity environment at a temperature of 121 ° C, a humidity of 80%, and a pressure of 2 atm. The degradation characteristics of the resistance change rate were evaluated. As a result, it was found that if the thickness was 10 / zm or more, deterioration could be prevented.
- the thickness of the glass layer is 10 ⁇ ! It is preferably about 40 / m. Further, in consideration of manufacturing variations, a value of 20 ⁇ or more is more preferable.
- the glass layer contains sodium ions (Na +), potassium ions (K-ten), and chloride ions (C1—), they diffuse into the metal artificial lattice film, especially at high temperatures, and become metallic. It has been found that they combine with the elements in the artificial lattice film and change their properties.
- Na + sodium ions
- K-ten potassium ions
- C1— chloride ions
- the content of sodium ion (Na +), potassium ion (K10), and chlorine ion (C1-) in the insulating layer formed on the substrate surface should be 10 p. It is necessary to select a material and a film formation method that can be set to pm or less.
- the content of sodium ion (Na +), potassium ion (K +), and chloride ion (C 1 ⁇ ) in the substrate 1 or the glass layer 2 in contact with the metal artificial lattice film 4 may be set to 10 ppm or less. . '
- the metal artificial lattice particularly at high temperatures, It diffuses into the film and combines with the elements in the metal artificial lattice film, changing its properties. Therefore, it was found that their contents should be set to 10 ppm or less.
- sodium ion (Na +), potassium ion (K tens), and chloride ion (C 1-) in both the glass layer and the first protective film are set to 10 ppm or less, more specific properties can be obtained. Deterioration can be improved.
- sodium ions (Na +), potassium ions (K +), and chloride ions (C 1-) which are contaminated during the manufacturing process, can be further stabilized if they are prevented.
- sodium ion (Na +) and power stream ion (K ) And chloride ion (C 1-) content should be 10 ppm or less.
- the content of sodium ion (Na +), potassium ion (K +), and chloride ion (C 1-) in the protective film in contact with the metal artificial lattice film may be set to 10 ⁇ ⁇ m or less.
- the magnetoresistance effect element of the present embodiment can be used even in a high-temperature and high-humidity environment such as an automobile. It can be used in a certain environment of 200 ° C or lower.
- the magnetoresistive effect element according to the present invention has no hysteresis even in a high temperature state, has small characteristic deterioration, and has excellent heat resistance and corrosion resistance. is there.
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Abstract
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Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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EP03795420A EP1536490A1 (en) | 2002-09-13 | 2003-09-12 | Magnetoresistance effect element and production method and application method therefor |
JP2004535958A JPWO2004025745A1 (ja) | 2002-09-13 | 2003-09-12 | 磁気抵抗効果素子およびこの製造方法並びに使用方法 |
AU2003266512A AU2003266512A1 (en) | 2002-09-13 | 2003-09-12 | Magnetoresistance effect element and production method and application method therefor |
US10/527,238 US20060164204A1 (en) | 2002-09-13 | 2003-09-12 | Magnetoresistance effect element and production method and application method therefor same |
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JP2002-268542 | 2002-09-13 | ||
JP2002268542 | 2002-09-13 | ||
JP2002268541 | 2002-09-13 | ||
JP2002-268541 | 2002-09-13 |
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EP (1) | EP1536490A1 (ja) |
JP (1) | JPWO2004025745A1 (ja) |
KR (1) | KR20050051655A (ja) |
CN (1) | CN1682386A (ja) |
AU (1) | AU2003266512A1 (ja) |
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US7786726B2 (en) | 2005-08-05 | 2010-08-31 | Kabushiki Kaisha Tokai Rika Denki Seisakusho | Sensor |
JP2011027495A (ja) * | 2009-07-23 | 2011-02-10 | Tokai Rika Co Ltd | 磁気センサの製造方法及び磁気センサ |
JP2013042694A (ja) * | 2011-08-24 | 2013-03-04 | Pacific Ind Co Ltd | 回転検出装置及び釣用リール |
JP6261707B1 (ja) * | 2016-11-22 | 2018-01-17 | 三菱電機株式会社 | センサデバイス装置 |
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KR100590211B1 (ko) * | 2002-11-21 | 2006-06-15 | 가부시키가이샤 덴소 | 자기 임피던스 소자, 그를 이용한 센서 장치 및 그 제조방법 |
US8585180B2 (en) * | 2009-10-28 | 2013-11-19 | Hewlett-Packard Development Company, L.P. | Protective coating for print head feed slots |
US9000763B2 (en) * | 2011-02-28 | 2015-04-07 | Infineon Technologies Ag | 3-D magnetic sensor |
JP6663259B2 (ja) * | 2016-03-15 | 2020-03-11 | エイブリック株式会社 | 半導体装置とその製造方法 |
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- 2003-09-12 EP EP03795420A patent/EP1536490A1/en not_active Withdrawn
- 2003-09-12 AU AU2003266512A patent/AU2003266512A1/en not_active Abandoned
- 2003-09-12 JP JP2004535958A patent/JPWO2004025745A1/ja active Pending
- 2003-09-12 WO PCT/JP2003/011687 patent/WO2004025745A1/ja not_active Application Discontinuation
- 2003-09-12 US US10/527,238 patent/US20060164204A1/en not_active Abandoned
- 2003-09-12 KR KR1020057004136A patent/KR20050051655A/ko not_active Application Discontinuation
- 2003-09-12 CN CNA038212943A patent/CN1682386A/zh active Pending
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Cited By (7)
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US7786726B2 (en) | 2005-08-05 | 2010-08-31 | Kabushiki Kaisha Tokai Rika Denki Seisakusho | Sensor |
JP2007194322A (ja) * | 2006-01-18 | 2007-08-02 | Alps Electric Co Ltd | 車載用gmr角度センサ |
JP4739963B2 (ja) * | 2006-01-18 | 2011-08-03 | アルプス電気株式会社 | 車載用gmr角度センサ |
JP2011027495A (ja) * | 2009-07-23 | 2011-02-10 | Tokai Rika Co Ltd | 磁気センサの製造方法及び磁気センサ |
JP2013042694A (ja) * | 2011-08-24 | 2013-03-04 | Pacific Ind Co Ltd | 回転検出装置及び釣用リール |
JP6261707B1 (ja) * | 2016-11-22 | 2018-01-17 | 三菱電機株式会社 | センサデバイス装置 |
JP2018085395A (ja) * | 2016-11-22 | 2018-05-31 | 三菱電機株式会社 | センサデバイス装置 |
Also Published As
Publication number | Publication date |
---|---|
KR20050051655A (ko) | 2005-06-01 |
JPWO2004025745A1 (ja) | 2006-01-12 |
CN1682386A (zh) | 2005-10-12 |
AU2003266512A1 (en) | 2004-04-30 |
EP1536490A1 (en) | 2005-06-01 |
US20060164204A1 (en) | 2006-07-27 |
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