JPH06176926A - 組成変調軟磁性膜およびその製造方法 - Google Patents

組成変調軟磁性膜およびその製造方法

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Publication number
JPH06176926A
JPH06176926A JP4322933A JP32293392A JPH06176926A JP H06176926 A JPH06176926 A JP H06176926A JP 4322933 A JP4322933 A JP 4322933A JP 32293392 A JP32293392 A JP 32293392A JP H06176926 A JPH06176926 A JP H06176926A
Authority
JP
Japan
Prior art keywords
soft magnetic
film
plating
layers
thin film
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.)
Pending
Application number
JP4322933A
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English (en)
Inventor
Hiroki Asai
弘紀 浅井
Yuji Komata
雄二 小俣
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP4322933A priority Critical patent/JPH06176926A/ja
Priority to US08/161,301 priority patent/US5489488A/en
Publication of JPH06176926A publication Critical patent/JPH06176926A/ja
Pending legal-status Critical Current

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    • 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
    • G11B5/31—Structure or manufacture of heads, e.g. inductive using thin films
    • G11B5/3163—Fabrication methods or processes specially adapted for a particular head structure, e.g. using base layers for electroplating, using functional layers for masking, using energy or particle beams for shaping the structure or modifying the properties of the basic layers
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y40/00—Manufacture or treatment of nanostructures
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/10—Electroplating with more than one layer of the same or of different metals
    • C25D5/12—Electroplating with more than one layer of the same or of different metals at least one layer being of nickel or chromium
    • C25D5/14—Electroplating with more than one layer of the same or of different metals at least one layer being of nickel or chromium two or more layers being of nickel or chromium, e.g. duplex or triplex layers
    • 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
    • G11B5/31—Structure or manufacture of heads, e.g. inductive using thin films
    • G11B5/3109—Details
    • G11B5/3113—Details for improving the magnetic domain structure or avoiding the formation or displacement of undesirable magnetic domains
    • 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
    • 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
    • H01F41/24—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 from liquids
    • H01F41/26—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 from liquids using electric currents, e.g. electroplating
    • 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
    • H01F41/30—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 for applying nanostructures, e.g. by molecular beam epitaxy [MBE]
    • H01F41/302—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 for applying nanostructures, e.g. by molecular beam epitaxy [MBE] for applying spin-exchange-coupled multilayers, e.g. nanostructured superlattices
    • H01F41/309—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 for applying nanostructures, e.g. by molecular beam epitaxy [MBE] for applying spin-exchange-coupled multilayers, e.g. nanostructured superlattices electroless or electrodeposition processes from plating solution
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/922—Static electricity metal bleed-off metallic stock
    • Y10S428/9265—Special properties
    • Y10S428/928—Magnetic property
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/922—Static electricity metal bleed-off metallic stock
    • Y10S428/9335—Product by special process
    • Y10S428/934—Electrical process
    • Y10S428/935—Electroplating
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12465—All metal or with adjacent metals having magnetic properties, or preformed fiber orientation coordinate with shape
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12632—Four or more distinct components with alternate recurrence of each type component
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12639—Adjacent, identical composition, components

Abstract

(57)【要約】 【目的】 本発明は高性能薄膜磁気ヘッドコア材用の軟
磁性積層膜およびその製造方法を提供することを目的と
する。 【構成】 成膜時の電流方向を、メッキ進行方向とそれ
に対して逆方向とに変化させ、各々組成の異なるメッキ
成長層と逆電流による再溶解の影響層からなる軟磁性積
層膜を得、磁区構造の制御を可能にする。

Description

【発明の詳細な説明】
【０００１】
【産業上の利用分野】本発明は高密度記録用薄膜磁気ヘ
ッドコア材に用いる軟磁性薄膜およびその製造方法に関
するものである。
【０００２】
【従来の技術】ＨＤＤ用の薄膜磁気ヘッドの磁気コア軟
磁性層としては従来から電気メッキ法によるパーマロイ
（Ni-Fe合金）磁性薄膜が最も一般的に用いられてき
た。電気メッキ法による製法の利点は軟磁性薄膜磁気コ
アパターンのパターン精度を高くできることにある。
【０００３】
【発明が解決しようとする課題】薄膜磁気ヘッドコアの
磁区構造の制御は不可逆な磁壁の移動により発生するヘ
ッドノイズを制御するため重要であるが、その一つの方
策としてヘッドコアの磁区構造を薄膜面内で消し、単磁
区化する方法がある。この方法に有効なのは磁性薄膜を
膜厚方向に少なくとも磁気的に分離された多層膜構造と
することであり、このことはパーマロイなどの軟磁性層
間に薄い非磁性層を有するような積層膜コアでの磁区評
価などから知られているが、積層膜全体が従来から磁気
ヘッドコア成膜のため用いられてきた電気メッキ法のみ
で作成できる実用的な方法が知られていなかった。
【０００４】
【課題を解決するための手段】上記のような課題を解決
するために、本発明では成膜時の印加電流をメッキ進行
方向とそれに対して逆方向とに順次変化させることによ
りメッキ成長層と逆電流による影響層が交互に積層した
膜、特にこの二層については各々膜組成の異なることを
特徴とする積層膜を成膜した。この膜は軟磁気的な性質
を有するメッキ成長層が、組成的にも磁気特性的にも異
なる逆電流による影響層で分離された形の積層膜であ
り、このような軟磁性膜が同一メッキ浴にて得ることが
可能となった。
【０００５】
【作用】メッキ膜成膜時、加える電流方向を逆転し膜の
溶解過程をいれることでメッキ成長層の次に逆電流によ
る再溶解の影響層、本発明ではメッキ成長層とは膜組成
が大きく異なる層が生じ、メッキ成長層と再溶解による
影響層が交互に積層した膜となる。この結果、メッキ成
長層である軟磁性層は各々分離されることになる。この
分離されたメッキ成長層が再溶解の影響層によって磁気
的に分離されることで薄膜面内での磁区構造は大きく影
響をうけ、たとえば多層の積層膜間で膜厚方向で静磁気
的に結合することで薄膜面内の磁区構造が単磁区となる
ことも条件によっては可能である。
【０００６】
【実施例】以下、具体例について述べる。表１は本発明
の実施例として、薄膜磁気ヘッド上部磁気コアパターン
上(被メッキ面積：0.5cm2）でのパーマロイ合金メッキ
においてメッキ進行時の電流値と膜溶解過程での逆電流
値を設定した場合のメッキ膜の膜組成などについてまと
めたものである。本発明の積層膜は図１に示す電流モー
ドで成膜し、図２に示すように基板３上に図１中メッキ
進行電流(I1)によるメッキ成長層１と逆方向電流(I2)に
よる再溶解の影響層２から構成される積層構造になる。
【０００７】
【表１】
【０００８】表１の実施例からパーマロイ合金の場合メ
ッキ時に電流方向を逆にすることによる膜溶解過程をお
こなうことにより10at%程度組成の異なる影響層が確認
された。薄膜表面の磁区観察をおこなった結果、影響層
の無いI2=0の試料に比べ電流値I2が大きな条件の膜では
磁区構造の大きな違いが生じていることが確認された。
【０００９】
【発明の効果】以上のように、メッキ時の電流方向を次
々に変化させ、それぞれ組成の異なるメッキ成長層と再
溶解による影響層の二層を交互に積層することで、膜厚
方向に軟磁性薄膜を分離し磁区構造を単磁区化した、磁
気ヘッドコアに適用可能な組成変調膜が作製可能となっ
た。
【図面の簡単な説明】
【図１】本発明の軟磁性メッキ薄膜成膜時のメッキ電流
の加わり方を示す図
【図２】本発明の軟磁性メッキ薄膜の製造方法によって
えられる積層膜構成を表わした図
【符号の説明】
１ メッキ進行時(I1)の成長層 ２ 逆電流時(I2)の再溶解による影響層 ３ 基板

Claims (4)

    【特許請求の範囲】
  1. 【請求項１】電気メッキ法で作製された軟磁性薄膜であ
    って、成膜時の電流方向をメッキ進行方向と、それに対
    し逆方向である溶解方向に交互に繰り返すことにより、
    メッキ成長層と逆電流による影響層が各々の層で膜組成
    が異なるように積層させたことを特徴とする軟磁性積層
    膜。
  2. 【請求項２】電気メッキ法で作製する軟磁性薄膜の製法
    であって、成膜時の電流方向をメッキ進行方向と、それ
    に対し逆方向である溶解方向に交互に繰り返すことによ
    り、メッキ成長層と逆電流による影響層が各々の層で膜
    組成が異なるように積層させたことを特徴とする軟磁性
    積層膜の製造方法。
  3. 【請求項３】軟磁性薄膜がパーマロイ合金であることを
    特徴とする請求項１記載の軟磁性積層膜。
  4. 【請求項４】軟磁性薄膜がパーマロイ合金であることを
    特徴とする請求項２記載の軟磁性積層膜の製造方法。
JP4322933A 1992-12-02 1992-12-02 組成変調軟磁性膜およびその製造方法 Pending JPH06176926A (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP4322933A JPH06176926A (ja) 1992-12-02 1992-12-02 組成変調軟磁性膜およびその製造方法
US08/161,301 US5489488A (en) 1992-12-02 1993-12-02 Soft magnetic film with compositional modulation and method of manufacturing the film

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4322933A JPH06176926A (ja) 1992-12-02 1992-12-02 組成変調軟磁性膜およびその製造方法

Publications (1)

Publication Number Publication Date
JPH06176926A true JPH06176926A (ja) 1994-06-24

Family

ID=18149258

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4322933A Pending JPH06176926A (ja) 1992-12-02 1992-12-02 組成変調軟磁性膜およびその製造方法

Country Status (2)

Country Link
US (1) US5489488A (ja)
JP (1) JPH06176926A (ja)

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