JP4633155B2 - 薄膜磁気ヘッドの製造方法 - Google Patents
薄膜磁気ヘッドの製造方法 Download PDFInfo
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- JP4633155B2 JP4633155B2 JP2008231165A JP2008231165A JP4633155B2 JP 4633155 B2 JP4633155 B2 JP 4633155B2 JP 2008231165 A JP2008231165 A JP 2008231165A JP 2008231165 A JP2008231165 A JP 2008231165A JP 4633155 B2 JP4633155 B2 JP 4633155B2
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- 239000010409 thin film Substances 0.000 title claims description 264
- 238000004519 manufacturing process Methods 0.000 title claims description 42
- 239000010408 film Substances 0.000 claims description 429
- 238000004804 winding Methods 0.000 claims description 128
- 239000000696 magnetic material Substances 0.000 claims description 101
- 239000010410 layer Substances 0.000 claims description 74
- 238000009713 electroplating Methods 0.000 claims description 37
- 239000010949 copper Substances 0.000 claims description 34
- 238000000034 method Methods 0.000 claims description 34
- 239000011229 interlayer Substances 0.000 claims description 27
- 230000001939 inductive effect Effects 0.000 claims description 25
- 239000000758 substrate Substances 0.000 claims description 25
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 23
- 229910052802 copper Inorganic materials 0.000 claims description 23
- 238000005530 etching Methods 0.000 claims description 18
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- 238000001312 dry etching Methods 0.000 claims description 9
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 6
- 229910000365 copper sulfate Inorganic materials 0.000 claims description 6
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 claims description 6
- 239000011810 insulating material Substances 0.000 claims description 5
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- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 3
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- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 35
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- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 9
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- YPSXFMHXRZAGTG-UHFFFAOYSA-N 4-methoxy-2-[2-(5-methoxy-2-nitrosophenyl)ethyl]-1-nitrosobenzene Chemical compound COC1=CC=C(N=O)C(CCC=2C(=CC=C(OC)C=2)N=O)=C1 YPSXFMHXRZAGTG-UHFFFAOYSA-N 0.000 description 4
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- 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
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- 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
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- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
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- H01F17/0013—Printed inductances with stacked layers
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- H01F41/02—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 manufacturing cores, coils, or magnets
- H01F41/04—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 manufacturing cores, coils, or magnets for manufacturing coils
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- H01F41/042—Printed circuit coils by thin film techniques
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- Magnetic Heads (AREA)
Description
Claims (6)
- 基板によって支持された誘導型薄膜磁気ヘッド素子を具える薄膜磁気ヘッドを製造する方法であって、前記誘導型薄膜磁気ヘッド素子を形成する方法が、
磁性材料より成る下部ポールを構成する第1の磁性材料膜を前記基板によって支持されるように形成する工程と、
この第1の磁性材料膜の上に下部トラックポールおよびバックギャップの橋絡部を構成する第2の磁性材料膜を形成する工程と、
前記第1および第2の磁性材料膜の上に、第1の層間絶縁膜を形成する工程と、
前記第1の層間絶縁膜の上に、第1の薄膜コイル半部の複数のコイル巻回体を、前記下部ポール、下部トラックポール、上部トラックポール、上部ポールおよび橋絡部で囲まれる部分では、他の部分よりも幅が狭くなる凹部を画成するように形成する工程と、
この第1の薄膜コイル半部の全体および露出している第1の層間絶縁膜を覆うように第2の層間絶縁膜を形成する工程と、
この第2の層間絶縁膜の上に、前記第1の薄膜コイル半部のコイル巻回体の間に画成された凹部を埋めるように第2の薄膜コイル半部を構成する導電膜を形成する工程と、
この導電膜の、薄膜コイル形成領域以外の部分を選択的に除去する工程と、
前記導電膜を選択的に除去した部分を埋めるように第1の絶縁膜を形成する工程と、
表面から前記第1の絶縁膜、導電膜および第1および第2の層間絶縁膜を研磨して、前記第1の薄膜コイル半部のコイル巻回体の間の凹部を埋める第2の薄膜コイル半部を形成し、第1および第2の層間絶縁膜によって薄膜コイルの最外周のコイル巻回体と下部トラックポールとの間を完全に埋め、且つ前記第1の絶縁膜によって薄膜コイルの下部トラックポールと隣接する部分以外の全外周を囲むとともに下部トラックポール、橋絡部および薄膜コイルの表面と同一平坦面を構成する工程と、
この平坦な表面の上にライトギャップ膜を構成する第2の絶縁膜を平坦に形成する工程と、
この第2の絶縁膜の平坦な表面に、上部トラックポールおよび上部ポールを構成する第3の磁性材料膜を前記橋絡部と接触するように形成する工程と、
この第3の磁性材料膜の、上部トラックポールを形成すべき部分にマスクを形成する工程と、
前記第3の磁性材料膜を選択的にエッチングして上部トラックポールを形成し、この上部トラックポールの周辺の第2の絶縁膜およびその下側の第2の磁性材料膜を選択的に除去して下部トラックポールを形成するエッチング工程と、
全体の上に絶縁材料より成るオーバーコート膜を形成する工程と、
を具える薄膜磁気ヘッドを製造する方法。 - 基板によって支持された誘導型薄膜磁気ヘッド素子を具える薄膜磁気ヘッドを製造する方法であって、前記誘導型薄膜磁気ヘッド素子を形成する方法が、
磁性材料より成る下部ポールを構成する第1の磁性材料膜を前記基板によって支持されるように形成する工程と、
この第1の磁性材料膜の上に下部トラックポールおよびバックギャップの橋絡部を構成する第2の磁性材料膜を形成する工程と、
前記第1および第2の磁性材料膜の上に、第1の層間絶縁膜を形成する工程と、
前記第1の層間絶縁膜の上に、第1の薄膜コイル半部の複数のコイル巻回体を、前記下部ポール、下部トラックポール、上部トラックポール、上部ポールおよび橋絡部で囲まれる部分では、他の部分よりも幅が狭くなる凹部を画成するように形成する工程と、
この第1の薄膜コイル半部の全体および露出している第1の層間絶縁膜を覆うように第2の層間絶縁膜を形成する工程と、
この第2の層間絶縁膜の上の薄膜コイル形成領域を覆うようにマスクを形成する工程と、
表面全体を覆うように第1の絶縁膜を形成する工程と、
この第1の絶縁膜の表面を、前記マスクが露出するように研磨する工程と、
前記マスクを除去して前記第2の層間絶縁膜の、前記第1の絶縁膜によって覆われていない部分を露出させる工程と、
この第2の層間絶縁膜の上に、前記第1の薄膜コイル半部のコイル巻回体の間に画成された凹部を埋めるように第2の薄膜コイル半部を構成する導電膜を形成する工程と、
表面から前記導電膜、第1の絶縁膜および第1および第2の層間絶縁膜を研磨して、前記凹部を埋める導電膜によって第2の薄膜コイル半部を形成し、第1および第2の層間絶縁膜によって薄膜コイルの最外周のコイル巻回体と下部トラックポールとの間を完全に埋め、且つ前記第1の絶縁膜によって薄膜コイルの下部トラックポールと隣接する部分以外の全外周を囲むとともに下部トラックポール、橋絡部および薄膜コイルの表面と同一平坦面を構成する工程と、
この平坦な表面の上にライトギャップ膜を構成する第2の絶縁膜を平坦に形成する工程と、
この第2の絶縁膜の平坦な表面に、上部トラックポールおよび上部ポールを構成する第3の磁性材料膜を前記橋絡部と接触するように形成する工程と、
この第3の磁性材料膜の、上部トラックポールを形成すべき部分にマスクを形成する工程と、
前記第3の磁性材料膜を選択的にエッチングして上部トラックポールを形成し、この上部トラックポールの周辺の第2の絶縁膜およびその下側の第2の磁性材料膜を選択的に除去して下部トラックポールを形成するエッチング工程と、
全体の上に絶縁材料より成るオーバーコート膜を形成する工程と、
を具える薄膜磁気ヘッドを製造する方法。 - 請求項1に記載の方法において、前記第1の薄膜コイル半部を銅の電解メッキで形成し、前記第2の薄膜コイル半部をCu-CVDで形成した第1の導電膜と、その上に銅の電解メッキで形成した第2の導電膜の2層で構成する薄膜磁気ヘッドを製造する方法。
- 請求項3に記載の方法において、前記第2の導電膜を銅の電解メッキで形成する前に、前記第1の導電膜の薄膜コイル形成領域以外の部分をレジストで覆い、第2の導電膜を形成した後、このレジストを除去して第1の導電膜を部分的に露出させ、第2の導電膜をマスクとして第1の導電膜の露出している部分を、イオンミリング、高温RIEによるドライエッチング、希硫酸、あるいは希塩酸を用いるウエットエッチング、または硫酸銅液中での電解エッチングで選択的に除去する薄膜磁気ヘッドを製造する方法。
- 請求項1または2に記載の方法において、前記第1および第2の薄膜コイル半部の隣接するコイル巻回体間に配設される第2の層間絶縁膜をアルミナ-CVDで形成する薄膜磁気ヘッドを製造する方法。
- 請求項5に記載の方法において、前記第2の層間絶縁膜を、1〜2Torrの減圧状態において、100〜400℃の温度で、Al(CH3)3またはAlCl3と、H2O、N2、N2OあるいはH2O2とを交互に断続的に噴射し、ケミカル反応によって堆積形成するアトミックレイヤー法で形成する薄膜磁気ヘッドを製造する方法。
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US6977796B2 (en) | 2005-12-20 |
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US7630172B2 (en) | 2009-12-08 |
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