EP1905051A1 - Dispositif radiofrequence avec element magnetique procede de fabrication d'un tel element magnetique - Google Patents
Dispositif radiofrequence avec element magnetique procede de fabrication d'un tel element magnetiqueInfo
- Publication number
- EP1905051A1 EP1905051A1 EP06778886A EP06778886A EP1905051A1 EP 1905051 A1 EP1905051 A1 EP 1905051A1 EP 06778886 A EP06778886 A EP 06778886A EP 06778886 A EP06778886 A EP 06778886A EP 1905051 A1 EP1905051 A1 EP 1905051A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- substrate
- magnetic
- magnetic element
- axis
- normal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 230000005291 magnetic effect Effects 0.000 title claims abstract description 87
- 238000000034 method Methods 0.000 title claims description 17
- 239000000758 substrate Substances 0.000 claims abstract description 44
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 14
- 229910045601 alloy Inorganic materials 0.000 claims description 14
- 239000000956 alloy Substances 0.000 claims description 14
- 238000000151 deposition Methods 0.000 claims description 8
- 238000004544 sputter deposition Methods 0.000 claims description 8
- 229910052757 nitrogen Inorganic materials 0.000 claims description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 6
- 230000008021 deposition Effects 0.000 claims description 6
- 239000001301 oxygen Substances 0.000 claims description 6
- 229910052760 oxygen Inorganic materials 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 239000000835 fiber Substances 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- 229910052804 chromium Inorganic materials 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 238000001704 evaporation Methods 0.000 claims description 2
- 230000008020 evaporation Effects 0.000 claims description 2
- 229910052735 hafnium Inorganic materials 0.000 claims description 2
- 229910052741 iridium Inorganic materials 0.000 claims description 2
- 229910052747 lanthanoid Inorganic materials 0.000 claims description 2
- 150000002602 lanthanoids Chemical class 0.000 claims description 2
- 229910052748 manganese Inorganic materials 0.000 claims description 2
- 229910052750 molybdenum Inorganic materials 0.000 claims description 2
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- 229910052758 niobium Inorganic materials 0.000 claims description 2
- 229910052763 palladium Inorganic materials 0.000 claims description 2
- 238000005240 physical vapour deposition Methods 0.000 claims description 2
- 229910052697 platinum Inorganic materials 0.000 claims description 2
- 229910052703 rhodium Inorganic materials 0.000 claims description 2
- 229910052707 ruthenium Inorganic materials 0.000 claims description 2
- 229910052710 silicon Inorganic materials 0.000 claims description 2
- 229910052715 tantalum Inorganic materials 0.000 claims description 2
- 229910052719 titanium Inorganic materials 0.000 claims description 2
- 229910052721 tungsten Inorganic materials 0.000 claims description 2
- 229910052720 vanadium Inorganic materials 0.000 claims description 2
- 238000004804 winding Methods 0.000 claims description 2
- 229910052726 zirconium Inorganic materials 0.000 claims description 2
- 238000007740 vapor deposition Methods 0.000 claims 3
- 238000005477 sputtering target Methods 0.000 claims 2
- 229910052742 iron Inorganic materials 0.000 claims 1
- 238000001947 vapour-phase growth Methods 0.000 claims 1
- 239000010408 film Substances 0.000 description 21
- 239000000463 material Substances 0.000 description 21
- 230000005415 magnetization Effects 0.000 description 14
- 230000000694 effects Effects 0.000 description 11
- 230000005350 ferromagnetic resonance Effects 0.000 description 7
- 230000012010 growth Effects 0.000 description 7
- 230000001939 inductive effect Effects 0.000 description 7
- 230000004907 flux Effects 0.000 description 6
- 150000002500 ions Chemical class 0.000 description 6
- 239000000696 magnetic material Substances 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 230000005294 ferromagnetic effect Effects 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 238000001659 ion-beam spectroscopy Methods 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000004377 microelectronic Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- -1 SIN ion Chemical class 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 238000000608 laser ablation Methods 0.000 description 1
- 229910001004 magnetic alloy Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005121 nitriding Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000036417 physical growth Effects 0.000 description 1
- 238000007750 plasma spraying Methods 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Classifications
-
- 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
- H01F10/007—Thin magnetic films, e.g. of one-domain structure ultrathin or granular films
-
- 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
-
- 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
- H01F41/14—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 magnetic films to substrates
- H01F41/18—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 magnetic films to substrates by cathode sputtering
-
- 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
- H01F41/14—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 magnetic films to substrates
- H01F41/20—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 magnetic films to substrates by evaporation
- H01F41/205—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 magnetic films to substrates by evaporation by laser ablation, e.g. pulsed laser deposition [PLD]
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/215—Frequency-selective devices, e.g. filters using ferromagnetic material
-
- 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
- H01F10/08—Thin magnetic films, e.g. of one-domain structure characterised by magnetic layers
- H01F10/10—Thin magnetic films, e.g. of one-domain structure characterised by magnetic layers characterised by the composition
- H01F10/12—Thin magnetic films, e.g. of one-domain structure characterised by magnetic layers characterised by the composition being metals or alloys
- H01F10/14—Thin magnetic films, e.g. of one-domain structure characterised by magnetic layers characterised by the composition being metals or alloys containing iron or nickel
- H01F10/147—Thin magnetic films, e.g. of one-domain structure characterised by magnetic layers characterised by the composition being metals or alloys containing iron or nickel with lattice under strain, e.g. expanded by interstitial nitrogen
-
- 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
- H01F10/08—Thin magnetic films, e.g. of one-domain structure characterised by magnetic layers
- H01F10/10—Thin magnetic films, e.g. of one-domain structure characterised by magnetic layers characterised by the composition
- H01F10/12—Thin magnetic films, e.g. of one-domain structure characterised by magnetic layers characterised by the composition being metals or alloys
- H01F10/16—Thin magnetic films, e.g. of one-domain structure characterised by magnetic layers characterised by the composition being metals or alloys containing cobalt
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F17/0006—Printed inductances
- H01F2017/0066—Printed inductances with a magnetic layer
Definitions
- Radio frequency device with magnetic element and method of manufacturing such a magnetic element Radio frequency device with magnetic element and method of manufacturing such a magnetic element
- the invention relates to radio frequency devices comprising a conductive element associated with a magnetic element, in particular radiofrequency inductive elements but also for example radio frequency filters or resonators.
- Hk anisotropic character characterized by a field called anisotropy.
- Hk anisotropy.
- This effect is generally obtained by conventional deposition of the material, plasma or electrochemical, in the presence of a magnetic field. It is an intrinsic contribution that depends preferentially on the chemical composition of the magnetic alloy. The amplitude of this effect is generally moderate with typically Hk less than or equal to 20 Oe. Under these conditions, the ferromagnetic resonance frequency which constitutes the upper limit to the dynamic use of these materials, remains too low ( ⁇ 2GHz) with regard to the applications targeted for telephony, in particular.
- shape effect which consists in reinforcing - artificially the intrinsic magnetic anisotropy of the material (Hk) by the contribution of the demagnetizing field (Hd) which depends on the geometry and the dimensions involved. More precisely, the contribution of the demagnetizing field will be greater as the width of the magnetic element in the direction perpendicular to that of the axis of easy magnetization will be reduced (difficult axis). magnetization).
- An object of the invention is to provide a ferromagnetic resonance and high frequency magnetic element while being compatible with the usual dimensions of planar inductances, solenoids and coplanar lines or micro-ribbons.
- Another aim is to make possible the realization of closed or quasi-closed magnetic circuits allowing a better magnetic flux closure.
- the reinforcement of the intrinsic magnetic anisotropy of the material is obtained by using another contribution of intrinsic origin related to the growth of the magnetic film from a flux of material whose main direction makes a non-zero angle of incidence relative to the plane of the substrate on which said film is deposited.
- the invention aims to maximize the effect so as to increase the ferromagnetic frequency in the desired range. The latter is naturally accompanied by a decrease in permeability, it will seek to preferentially use materials with high magnetization (> 1 T) in order to maintain high permeability values.
- an advantage of the invention consists in the addition of a contribution to the intrinsic anisotropy of the material by the realization of a micro structure having a preferred direction of growth whose axis n 'is not orthogonal (normal) to the plane of the substrate.
- fibrous texture that is to say consisting of aggregates preferably elongated in the direction of the incident flow.
- a radiofrequency device comprising an electrically conductive element associated with at least one first continuous magnetic element comprising a substrate coated with a magnetic film having a granular structure with grains inclined by normal to the substrate or a fibrous texture inclined relative to the normal to the substrate.
- the continuous magnetic element makes it possible to minimize the leakage of electromagnetic flux and the inclination of the grains or of the fibrous texture of the magnetic film makes it possible to reinforce the intrinsic anisotropy of the material and therefore its ferromagnetic resonance frequency.
- the direction of the inclination axis of the grains or fibers projected in the plane of the substrate coincides with that of the magnetic field applied during the deposition.
- the distance between the magnetic elements (upper and lower) and the conductor is weak, typically less than or equal to 5 microns.
- the magnetic film is for example an alloy comprising at least one element taken from the group formed by iron (Fe), cobalt
- the magnetic film may be, for example, an alloy of FeCoXN or FeCoXO or FeCoXNO or FeXN or FeXO or FeXNO, X being chosen from the following elements: Zr, Nb, Mo, Ru, Rh, Pd, Hf, Ta, W, Ir, Pt, Al, Si, Ti, V, Cr, Mn, Cu and Lanthanides (rare earths).
- a particularly interesting alloy is the FeXNO alloy.
- the high magnetization alloys of the FeHfN (O) granular type which naturally have a columnar grain micro structure dispersed in an amorphous structure, are particularly well suited for the devices according to the invention.
- the increase of the intrinsic anisotropy of the material is marked for FeHfN and it is all the more so for a FeHfNO alloy.
- the grain shape factor predisposes them all the more to the desired effect that the intergranular exchange coupling is partially relaxed because of the dispersion of the ferromagnetic grains in a weakly magnetic matrix (weak magnetization) by selective oxidation with FeHfNO material.
- the angle of inclination of the grains or of the fibrous texture with respect to the normal to the substrate is greater than 0 ° and less than 90 ° and advantageously between 20 ° and 80 °.
- the first magnetic element may be disposed above or below the conductive element.
- a second continuous magnetic element comprising a substrate coated with a magnetic film having a granular structure with grains inclined relative to normal to the substrate or a fiber texture inclined relative to the normal to the substrate.
- the second magnetic element is preferably identical to the first magnetic element.
- the directions of anisotropy in the plane of the two magnetic elements may differ and have for example a 90 ° angle for a solenoid using a closed frame in the plane.
- the conductive element may be a spiral element, in coplanar line or microstrip, said conductive element then being sandwiched between the two continuous magnetic elements.
- the conductive element may be a toroidal element so as to provide solenoidal inductances, which conductive element is then formed around a continuous magnetic element.
- the conductive element may be an element of a coplanar line or microstrip sandwiched between two continuous magnetic elements so as to perform filtering (low-pass or atténueur of 'noise bandpass.
- a method for manufacturing a magnetic element of a radiofrequency device as defined above comprising a physical vapor deposition on an inclined substrate, for example an oblique ion sputtering on the substrate advantageously under a magnetic field.
- a target contains the material to be deposited and a receiving substrate is subjected to a magnetic field and an auxiliary abrasive source is optionally used.
- the angle of incidence between the main direction of the material flow to be deposited from the target and the normal to the substrate receiving the deposit may be set to a value other than zero by adjusting the angles of inclination of the abrasive source and or the target and / or the substrate.
- the deposition is advantageously carried out on a substrate that is not parallel to the target (the flow of material being normal to the target), ie on a substrate whose the normal makes a non-zero angle with the normal to the target.
- the directivity of the matter emission also makes it possible to operate on the angle between the direction of the material flow and the normal to the target.
- the direction of the magnetic field is preferably orthogonal to the direction of the axes around which are capable of rotate the abrasion source, target and substrate. This allows to have directions of anisotropy of the material of a. part induced by the field during the deposition and secondly due to the collinear grain inclination, which allows a direct cumulative effect and a simple (linear) control of the anisotropic strengthening effect. . - ' .
- the ion sputtering technique is the most adapted to the invention from an industrial point of view since it allows the synthesis of the type of magnetic material used in the invention on large surface substrates compatible with the usual dimensions used in microelectronics (that is to say platelets having diameters up to 300 mm).
- the oblique ion sputtering is for example carried out from a target of CoFeX alloy or FeX, in the presence of nitrogen and / or oxygen.
- FIG. 1 schematically illustrates an embodiment of a radiofrequency device according to the invention
- FIG. 2 is a partial top view of the device of FIG. 1,
- FIGS. 4 and 5 illustrate very schematically a mode of implementation of a method according to the invention.
- FIGS. 6 to 8 very schematically illustrate other embodiments of a radiofrequency device according to the invention.
- the reference DRF designates a radiofrequency device according to the invention comprising in this exemplary embodiment a conducting element IS formed of a spiral coil sandwiched between a first magnetic element EM1 situated above of the coil IS and a second magnetic element EM2 located below the coil.
- the two magnetic elements are continuous elements and are advantageously spaced a distance d small relative to the conducting element IS.
- This distance d is for example less than or equal to 5 microns.
- each magnetic element in this case the magnetic element EM1, comprises a substrate SB1 covered with a continuous granular magnetic film SM1 and whose grains have an oblique orientation with respect to the normal NM to the substrate SB1.
- the orientation angle ⁇ is for example of the order of 60 ° and may be more generally between 20 ° and 80 °.
- the direction of easy magnetization of origin Hk, proper to the magnetic material, and induced during the deposition thereof is collinear with the direction of easy magnetization of origin Hk 'due to the inclination of the grains GR of the magnetic film.
- the intrinsic anisotropy Hk of the magnetic material is enhanced by the intrinsic contribution Hk 'due to the inclination of the grains or the fibrous texture of the film.
- magnetic materials with highly columnar growth and having the characteristic that is the dispersion of the crystalline phase (columnar grains) in a disordered matrix for example amorphous.
- the grain shape factor leads to a proper direction of anisotropy in the direction of the greatest elongation.
- the agglomerate of grains in the case of a dense and homogeneous classical micro-structure cancels this local contribution by ensuring a very strong intergranular exchange coupling
- the local effects due to the grains are collectively felt at the film scale with an amplitude proportional to the residual intergranular exchange coupling in the case of a dispersion of the grains in a second phase having characteristics different from those of the grains (in particular a much weaker magnetization it is an amorphous phase).
- This residual intergranular exchange coupling depends mainly on the grain diameter and the distance between the grains. The effect will be all the stronger as the direction of the greatest grain size (growth direction) has a nonzero angle of inclination ⁇ , according to the invention.
- the materials advantageously possessing these two characteristics are FeXN and FeXO alloys. and FeXNO and especially FeHfN or FeHfNO alloys. Indeed, these materials have the peculiarity of having a very strongly columnar natural growth (form factor> 10) associated with a microstructure advantageously combining grains of small diameters (from 100 to 5 nm) dispersed in a regular and controlled manner.
- the formation of the magnetic film of the magnetic element is advantageously carried out using an ion beam sputtering (IBS) deposit which offers a great deal of latitude in terms of exploiting the angle between the flux of the magnetic element. subject to deposit and substrate, which do not allow conventional plasma spraying techniques.
- IBS deposition technique is very well adapted to the synthesis of this type of material and it effectively allows the use of the physical growth effect of inclined grains over a large surface compatible with that conventionally used in microelectronics, for example, plates with a diameter of up to 300mm.
- an SIN ion source capable of pivoting about an axis Ox generates a main flow of ions, for example argon towards a CB target formed, for example, of FeX.
- the CB target is therefore bombarded by the main stream of argon in the presence of nitrogen and oxygen (when it is desired to obtain FeXNO alloys) at room temperature.
- the FeX particles extracted from the target are then sprayed onto the SB substrate with an angle of incidence.
- This angle of incidence can be adjusted according to the inclination axis ⁇ of the source SIN around the axis Ox, a tilt angle ⁇ of the substrate relative to the normal to the target, and of the angle of inclination ⁇ 'of the target CB around the axis Ox.
- the growth of the magnetic film is carried out under a magnetic field H applied in the plane of the substrate and advantageously orthogonal to the pivot axis Ox of the source SIN and the axis Ox of the substrate holder.
- the intensity of this uni-axial magnetic field is for example about 100 to 200 Oe.
- the nitriding and oxidation processes are controlled respectively by means of the enrichment rates of injected secondary gases (reactants).
- the rate relative to nitrogen enrichment is defined by the ratio: N 2 / (Ar + N 2 + O 2 ) and the rate of oxygen enrichment by O 2 / (Ar + N 2 + O 2 ). These rates can typically range from 0% to 25%.
- the thicknesses of the films formed are typically between 500 ⁇ and 5000 ⁇ .
- the atomic percentage of nitrogen is preferably between 5% and 20%. Indeed, for such a percentage, thin films
- Nitrogen is incorporated in the interstitial position in the crystallographic mesh of FeX nano - grains until saturation of the solid solution in the grains (about 15-20 atomic%). This incorporation is accompanied by a significant expansion of the crystalline FeX mesh (up to 5%), the consequence of which is a reduction in the average grain size.
- Oxygen is preferably incorporated in the X-rich amorphous phase coating said FeXN grains.
- the advantage of this process is the very low oxidation of the FeXN ferromagnetic phase, which makes it possible to maintain high magnetization.
- the FeXN grains have a mean Torde diameter of 10 to 2 nm with an average intergranular distance of the order of 5 to 1 nm. This allows obtaining soft magnetic properties (Hc ⁇ . 5 Oe). These films have an induced magnetic anisotropy characterized by an anisotropy field of the order of 10 to 40
- These films retain a high saturation magnetization, typically of the order of 1.9 to 1.0 T.
- the electrical resistivity of the films increases with the increase in the nitrogen and oxygen content to a value typically between 500 and 1 000 ⁇ .cm.
- a DRF device may comprise only one magnetic element EM which can be disposed above (FIG. 6) or below (FIG. 7) of the conducting element IS.
- This conductive element IS can be for example a spiral, a coplanar line, a micro-ribbon line.
- the conductive element IS can be formed, as illustrated in FIG. 8, of a solenoid winding formed around a continuous magnetic element EM.
- the invention thus makes it possible, in particular, to make possible the production of radiofrequency inductive devices having the particularity of using a continuous and almost closed magnetic circuit around an inductive element.
- the advantage consists in optimum confinement of the magnetic field in said circuit.
- band-cut, low-pass and pass-band filtering functions are also possible with attenuations typically greater than -10 dB per mm of line and per ⁇ m of material thickness. deposit.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Nanotechnology (AREA)
- Manufacturing & Machinery (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Thin Magnetic Films (AREA)
- Coils Or Transformers For Communication (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0507768A FR2888994B1 (fr) | 2005-07-21 | 2005-07-21 | Dispositif radiofrequence avec element magnetique et procede de fabrication d'un tel element magnetique |
PCT/FR2006/001765 WO2007010137A1 (fr) | 2005-07-21 | 2006-07-19 | Dispositif radiofrequence avec element magnetique procede de fabrication d'un tel element magnetique |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1905051A1 true EP1905051A1 (fr) | 2008-04-02 |
Family
ID=36087675
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06778886A Withdrawn EP1905051A1 (fr) | 2005-07-21 | 2006-07-19 | Dispositif radiofrequence avec element magnetique procede de fabrication d'un tel element magnetique |
Country Status (5)
Country | Link |
---|---|
US (1) | US20080297292A1 (fr) |
EP (1) | EP1905051A1 (fr) |
JP (1) | JP2009502036A (fr) |
FR (1) | FR2888994B1 (fr) |
WO (1) | WO2007010137A1 (fr) |
Families Citing this family (82)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8755222B2 (en) | 2003-08-19 | 2014-06-17 | New York University | Bipolar spin-transfer switching |
US7911832B2 (en) | 2003-08-19 | 2011-03-22 | New York University | High speed low power magnetic devices based on current induced spin-momentum transfer |
US9812184B2 (en) | 2007-10-31 | 2017-11-07 | New York University | Current induced spin-momentum transfer stack with dual insulating layers |
WO2009082706A1 (fr) | 2007-12-21 | 2009-07-02 | The Trustees Of Columbia University In The City Of New York | Réseau de capteur cmos actif pour la détection biomoléculaire électrochimique |
WO2012166877A1 (fr) * | 2011-05-31 | 2012-12-06 | The Trustees Of Columbia University In The City Of New York | Systèmes et procédés pour des inducteurs de puissance couplés |
US9082950B2 (en) | 2012-10-17 | 2015-07-14 | New York University | Increased magnetoresistance in an inverted orthogonal spin transfer layer stack |
US9082888B2 (en) | 2012-10-17 | 2015-07-14 | New York University | Inverted orthogonal spin transfer layer stack |
US8982613B2 (en) | 2013-06-17 | 2015-03-17 | New York University | Scalable orthogonal spin transfer magnetic random access memory devices with reduced write error rates |
US9263667B1 (en) | 2014-07-25 | 2016-02-16 | Spin Transfer Technologies, Inc. | Method for manufacturing MTJ memory device |
US9337412B2 (en) | 2014-09-22 | 2016-05-10 | Spin Transfer Technologies, Inc. | Magnetic tunnel junction structure for MRAM device |
US9728712B2 (en) | 2015-04-21 | 2017-08-08 | Spin Transfer Technologies, Inc. | Spin transfer torque structure for MRAM devices having a spin current injection capping layer |
US10468590B2 (en) | 2015-04-21 | 2019-11-05 | Spin Memory, Inc. | High annealing temperature perpendicular magnetic anisotropy structure for magnetic random access memory |
US9853206B2 (en) | 2015-06-16 | 2017-12-26 | Spin Transfer Technologies, Inc. | Precessional spin current structure for MRAM |
US9773974B2 (en) | 2015-07-30 | 2017-09-26 | Spin Transfer Technologies, Inc. | Polishing stop layer(s) for processing arrays of semiconductor elements |
US10163479B2 (en) | 2015-08-14 | 2018-12-25 | Spin Transfer Technologies, Inc. | Method and apparatus for bipolar memory write-verify |
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JPS59185022A (ja) * | 1983-04-04 | 1984-10-20 | Fuji Photo Film Co Ltd | 磁気記録媒体 |
JPS61202314A (ja) * | 1985-03-04 | 1986-09-08 | Hitachi Ltd | 薄膜磁気ヘツドの製造方法 |
JPH01309958A (ja) * | 1988-06-07 | 1989-12-14 | Canon Inc | スパッタリング法による機能性堆積膜形成方法および装置 |
JPH0499173A (ja) * | 1990-08-07 | 1992-03-31 | Nec Corp | スパッタリング装置 |
JP3255469B2 (ja) * | 1992-11-30 | 2002-02-12 | 三菱電機株式会社 | レーザ薄膜形成装置 |
JPH07268610A (ja) * | 1994-03-28 | 1995-10-17 | Alps Electric Co Ltd | 軟磁性合金薄膜 |
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JPH11144955A (ja) * | 1997-09-02 | 1999-05-28 | Matsushita Electric Ind Co Ltd | 磁性体薄膜及びそれを用いた磁気ヘッド |
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JP3971697B2 (ja) * | 2002-01-16 | 2007-09-05 | Tdk株式会社 | 高周波用磁性薄膜及び磁気素子 |
US6770353B1 (en) * | 2003-01-13 | 2004-08-03 | Hewlett-Packard Development Company, L.P. | Co-deposited films with nano-columnar structures and formation process |
US7560927B2 (en) * | 2003-08-28 | 2009-07-14 | Massachusetts Institute Of Technology | Slitted and stubbed microstrips for high sensitivity, near-field electromagnetic detection of small samples and fields |
JP4645178B2 (ja) * | 2004-11-30 | 2011-03-09 | Tdk株式会社 | 磁気素子およびインダクタ |
EP1662519A2 (fr) * | 2004-11-30 | 2006-05-31 | TDK Corporation | Film magnétique mince et procédé de fabrication associé, dispositif magnétique et inductance, et procédé de fabrication d'un dispositif magnétique |
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2005
- 2005-07-21 FR FR0507768A patent/FR2888994B1/fr not_active Expired - Fee Related
-
2006
- 2006-07-19 WO PCT/FR2006/001765 patent/WO2007010137A1/fr active Application Filing
- 2006-07-19 US US11/996,332 patent/US20080297292A1/en not_active Abandoned
- 2006-07-19 EP EP06778886A patent/EP1905051A1/fr not_active Withdrawn
- 2006-07-19 JP JP2008522018A patent/JP2009502036A/ja active Pending
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FR2888994A1 (fr) | 2007-01-26 |
JP2009502036A (ja) | 2009-01-22 |
FR2888994B1 (fr) | 2007-10-12 |
US20080297292A1 (en) | 2008-12-04 |
WO2007010137A1 (fr) | 2007-01-25 |
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