CA1241111A - Thin film magnetic transducer having center tapped winding - Google Patents
Thin film magnetic transducer having center tapped windingInfo
- Publication number
- CA1241111A CA1241111A CA000503759A CA503759A CA1241111A CA 1241111 A CA1241111 A CA 1241111A CA 000503759 A CA000503759 A CA 000503759A CA 503759 A CA503759 A CA 503759A CA 1241111 A CA1241111 A CA 1241111A
- Authority
- CA
- Canada
- Prior art keywords
- winding
- magnetic
- windings
- thin film
- pole piece
- 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.)
- Expired
Links
- 238000004804 winding Methods 0.000 title claims abstract description 139
- 239000010409 thin film Substances 0.000 title claims abstract description 34
- 239000004020 conductor Substances 0.000 claims abstract description 45
- 230000007704 transition Effects 0.000 claims abstract description 15
- 238000009413 insulation Methods 0.000 claims description 19
- 230000004907 flux Effects 0.000 claims description 6
- 230000002463 transducing effect Effects 0.000 claims description 5
- 239000000758 substrate Substances 0.000 claims description 4
- 230000001939 inductive effect Effects 0.000 claims description 2
- 230000002452 interceptive effect Effects 0.000 claims 1
- UGKDIUIOSMUOAW-UHFFFAOYSA-N iron nickel Chemical compound [Fe].[Ni] UGKDIUIOSMUOAW-UHFFFAOYSA-N 0.000 abstract description 4
- 238000000151 deposition Methods 0.000 description 5
- 230000001965 increasing effect Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000005137 deposition process Methods 0.000 description 3
- 229920002120 photoresistant polymer Polymers 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
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
- G11B5/31—Structure or manufacture of heads, e.g. inductive using thin films
- G11B5/3109—Details
- G11B5/313—Disposition of 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
- G11B5/312—Details for reducing flux leakage between the electrical coil layers and the magnetic cores or poles or between the magnetic cores or poles
- G11B5/3123—Details for reducing flux leakage between the electrical coil layers and the magnetic cores or poles or between the magnetic cores or poles by using special coil configurations or conductors
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Magnetic Heads (AREA)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/731,690 US4713711A (en) | 1985-05-08 | 1985-05-08 | Thin film magnetic transducer having center tapped winding |
| US06/731,690 | 1985-05-08 | ||
| SG147794A SG147794G (en) | 1985-05-08 | 1994-10-13 | A thin film magnetic transducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1241111A true CA1241111A (en) | 1988-08-23 |
Family
ID=26664417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000503759A Expired CA1241111A (en) | 1985-05-08 | 1986-03-11 | Thin film magnetic transducer having center tapped winding |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US4713711A (en, 2012) |
| EP (1) | EP0213687B1 (en, 2012) |
| JP (1) | JPS61255523A (en, 2012) |
| CA (1) | CA1241111A (en, 2012) |
Families Citing this family (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62173607A (ja) * | 1986-01-27 | 1987-07-30 | Hitachi Ltd | 薄膜磁気ヘツド |
| JPS63193896A (ja) * | 1987-02-06 | 1988-08-11 | 株式会社東芝 | 薄膜電磁変換器 |
| JPH083887B2 (ja) * | 1987-05-18 | 1996-01-17 | ヤマハ株式会社 | 薄膜磁気ヘッドの製造方法 |
| US5856898A (en) * | 1988-02-29 | 1999-01-05 | Nec Corporation | Spiral coil pattern including same layer spiral patterns suitable for use in a thin film head |
| DE3831803C2 (de) * | 1988-09-19 | 1995-02-09 | Siemens Ag | Dünnfilm-Magnetkopf mit einer flachen Schreib-/Lesespulenwicklung |
| US5241440A (en) * | 1989-08-23 | 1993-08-31 | Hitachi, Ltd. | Thin film magnetic head and manufacturing method therefor |
| US5170303A (en) * | 1990-04-30 | 1992-12-08 | Seagate Technology Inc. | Inductive thin film head having improved readback characteristics |
| JPH0413212A (ja) * | 1990-05-07 | 1992-01-17 | Mitsubishi Electric Corp | 薄膜磁気ヘッド |
| NL9001147A (nl) * | 1990-05-17 | 1991-12-16 | Philips Nv | Dunnefilm magneetkop. |
| US5142425A (en) * | 1990-08-09 | 1992-08-25 | Hewlett-Packard Company | Disk drive in which magnetic head-to-disk capacitive coupling is eliminated |
| US5173826A (en) * | 1991-06-03 | 1992-12-22 | Read-Rite Corp. | Thin film head with coils of varying thickness |
| JPH0673335B2 (ja) * | 1991-07-04 | 1994-09-14 | 株式会社アモルファス・電子デバイス研究所 | 薄膜磁気素子 |
| JP3086768B2 (ja) * | 1993-06-30 | 2000-09-11 | 株式会社東芝 | 磁気記録再生装置用増幅回路 |
| US5717552A (en) * | 1996-09-10 | 1998-02-10 | Ampex Corporation | Magnetic core with field confinement structure |
| US5875080A (en) * | 1997-09-05 | 1999-02-23 | International Business Machines Corporation | Write head with second coil above pole having coil density less electrically connected first coil below the pole |
| JP2000099913A (ja) * | 1998-09-24 | 2000-04-07 | Tdk Corp | 薄膜磁気ヘッドおよびその製造方法 |
| US6829819B1 (en) | 1999-05-03 | 2004-12-14 | Western Digital (Fremont), Inc. | Method of forming a magnetoresistive device |
| US6944938B1 (en) | 1999-05-03 | 2005-09-20 | Western Digital (Fremont), Inc. | Method of forming a magnetoresistive device |
| US6496330B1 (en) | 1999-09-09 | 2002-12-17 | Read-Rite Corporation | Magnetic write head having a splitcoil structure |
| JP2001319312A (ja) | 2000-05-10 | 2001-11-16 | Tdk Corp | 薄膜コイルおよびその製造方法ならびに薄膜磁気ヘッドおよびその製造方法 |
| US7154974B2 (en) * | 2002-02-12 | 2006-12-26 | Broadcom Corporation | Data recovery system and applications thereof in radio receivers |
| US6857937B2 (en) | 2002-05-30 | 2005-02-22 | Komag, Inc. | Lapping a head while powered up to eliminate expansion of the head due to heating |
| US7248433B1 (en) * | 2004-02-02 | 2007-07-24 | Western Digital (Fremont), Inc. | Magnetic head with stitched top pole layer and single layer coil or solenoidal coil |
| US8547659B1 (en) | 2011-05-09 | 2013-10-01 | Western Digital (Fremont), Llc | System for providing a transducer having a main coil and an additional coil separated from the main pole by a write shield |
| US8514517B1 (en) | 2011-06-30 | 2013-08-20 | Western Digital (Fremont), Llc | Systems and methods for providing hybrid coils for magnetic write heads |
| US9230570B1 (en) * | 2014-08-28 | 2016-01-05 | Seagate Technology Llc | Write head having two yokes |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5233511A (en) * | 1975-09-10 | 1977-03-14 | Hitachi Ltd | Film magnetic head |
| JPS5931768B2 (ja) * | 1976-06-11 | 1984-08-04 | 株式会社日立製作所 | 中点端子つき薄膜磁気ヘツド |
| JPS5398811A (en) * | 1977-02-09 | 1978-08-29 | Hitachi Ltd | Thin film magnetic head |
| JPS5542352A (en) * | 1978-09-19 | 1980-03-25 | Seiko Epson Corp | Integrated head |
| JPS5658124A (en) * | 1979-10-17 | 1981-05-21 | Fujitsu Ltd | Thin-film magnetic head |
| JPS5661019A (en) * | 1979-10-24 | 1981-05-26 | Fujitsu Ltd | Manufacture of thin film magnetic head |
| JPS5766522A (en) * | 1980-10-13 | 1982-04-22 | Hitachi Ltd | Thin-film magnetic head |
| US4458279A (en) * | 1981-03-23 | 1984-07-03 | Magnex Corporation | Thin film transducer and method of making same |
| JPS58128012A (ja) * | 1982-01-27 | 1983-07-30 | Hitachi Ltd | 薄膜磁気ヘツドおよびその製造方法 |
| JPS5975420A (ja) * | 1982-10-22 | 1984-04-28 | Hitachi Ltd | 薄膜磁気ヘツドおよびその製造方法 |
| JPS61115212A (ja) * | 1984-11-09 | 1986-06-02 | Fujitsu Ltd | 薄膜磁気ヘツドの製造方法 |
-
1985
- 1985-05-08 US US06/731,690 patent/US4713711A/en not_active Expired - Fee Related
-
1986
- 1986-03-11 CA CA000503759A patent/CA1241111A/en not_active Expired
- 1986-04-04 JP JP61076849A patent/JPS61255523A/ja active Granted
- 1986-04-28 EP EP86303214A patent/EP0213687B1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| EP0213687A3 (en) | 1989-03-15 |
| EP0213687A2 (en) | 1987-03-11 |
| US4713711A (en) | 1987-12-15 |
| JPH0327967B2 (en, 2012) | 1991-04-17 |
| JPS61255523A (ja) | 1986-11-13 |
| EP0213687B1 (en) | 1992-12-30 |
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| KR100379045B1 (ko) | 기록소자와판독소자가제공된자기헤드 | |
| JP2509968B2 (ja) | マルチトラック磁気抵抗効果型磁気ヘッド | |
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| JPS60103512A (ja) | 薄膜磁気ヘツド | |
| JP2863552B2 (ja) | 薄膜磁気ヘッドおよびこの薄膜磁気ヘッドを用いた記録再生装置 | |
| JPS5857617A (ja) | 薄膜磁気ヘツド | |
| JPH04362505A (ja) | 薄膜磁気読み出し／書き込みヘッド及び磁気記録システム | |
| JPH01134702A (ja) | トラッキング制御装置 | |
| CA2052611A1 (en) | Thin film transducer/transformer assembly | |
| JPS61142518A (ja) | 薄膜磁気ヘッド | |
| JPH02281405A (ja) | 薄膜磁気ヘッド |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |