JPH0157408B2 - - Google Patents
Info
- Publication number
- JPH0157408B2 JPH0157408B2 JP55063938A JP6393880A JPH0157408B2 JP H0157408 B2 JPH0157408 B2 JP H0157408B2 JP 55063938 A JP55063938 A JP 55063938A JP 6393880 A JP6393880 A JP 6393880A JP H0157408 B2 JPH0157408 B2 JP H0157408B2
- Authority
- JP
- Japan
- Prior art keywords
- ferrite
- magnetic
- magnetic head
- sno
- mol
- 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
- 229910000859 α-Fe Inorganic materials 0.000 claims description 107
- 229910006404 SnO 2 Inorganic materials 0.000 claims description 52
- 239000013078 crystal Substances 0.000 claims description 52
- 239000011521 glass Substances 0.000 claims description 37
- 239000006104 solid solution Substances 0.000 claims description 31
- 230000035699 permeability Effects 0.000 claims description 24
- 239000000696 magnetic material Substances 0.000 claims description 11
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 239000000203 mixture Substances 0.000 description 28
- 239000011162 core material Substances 0.000 description 22
- 238000012545 processing Methods 0.000 description 18
- 239000000463 material Substances 0.000 description 17
- 230000000694 effects Effects 0.000 description 15
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 8
- 238000004804 winding Methods 0.000 description 8
- 230000005415 magnetization Effects 0.000 description 7
- 238000005259 measurement Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 238000001556 precipitation Methods 0.000 description 6
- 230000005347 demagnetization Effects 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- 230000004907 flux Effects 0.000 description 4
- 238000003754 machining Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 235000004522 Pentaglottis sempervirens Nutrition 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 240000004050 Pentaglottis sempervirens Species 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000005350 fused silica glass Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229910000889 permalloy Inorganic materials 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910000702 sendust Inorganic materials 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000002344 surface layer Substances 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
- G11B5/133—Structure or manufacture of heads, e.g. inductive with cores composed of particles, e.g. with dust cores, with ferrite cores with cores composed of isolated magnetic particles
-
- 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
- G11B5/187—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features
- G11B5/193—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features the pole pieces being ferrite or other magnetic particles
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Magnetic Heads (AREA)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6393880A JPS56163518A (en) | 1980-05-16 | 1980-05-16 | Magnetic head |
| US06/264,706 US4439794A (en) | 1980-05-16 | 1981-05-18 | Magnetic head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6393880A JPS56163518A (en) | 1980-05-16 | 1980-05-16 | Magnetic head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56163518A JPS56163518A (en) | 1981-12-16 |
| JPH0157408B2 true JPH0157408B2 (US07902200-20110308-C00004.png) | 1989-12-05 |
Family
ID=13243781
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6393880A Granted JPS56163518A (en) | 1980-05-16 | 1980-05-16 | Magnetic head |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US4439794A (US07902200-20110308-C00004.png) |
| JP (1) | JPS56163518A (US07902200-20110308-C00004.png) |
Families Citing this family (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL8200481A (nl) * | 1982-02-09 | 1983-09-01 | Philips Nv | Magneetkop. |
| NL8204897A (nl) * | 1982-12-20 | 1984-07-16 | Philips Nv | Magneetkop met een kern van mn-zn-co-ferroferriet. |
| JPS60224109A (ja) * | 1984-04-20 | 1985-11-08 | Hitachi Ltd | 複合型磁気ヘツドを用いた磁気記録再生装置 |
| US4521323A (en) * | 1984-06-27 | 1985-06-04 | Matsushita Electric Industrial Co., Ltd. | Polycrystalline ferrite and a magnetic head using the same |
| JP2781849B2 (ja) * | 1987-07-14 | 1998-07-30 | 三洋電機株式会社 | 磁気ヘッド及びその製造方法 |
| US5278716A (en) * | 1987-07-14 | 1994-01-11 | Sanyo Electric Co. | Magnetic head with suppressed generation of pseudogap |
| US5195004A (en) * | 1987-07-14 | 1993-03-16 | Sanyo Electric Co., Ltd. | Method of manufacturing a magnetic core half |
| JPH0770384B2 (ja) * | 1988-03-29 | 1995-07-31 | 日本碍子株式会社 | Ｍｎ−Ｚｎフェライトの加工方法 |
| JP2619017B2 (ja) * | 1988-10-11 | 1997-06-11 | 日立マクセル株式会社 | 複合磁気ヘッド |
| JPH0827902B2 (ja) * | 1989-03-24 | 1996-03-21 | シャープ株式会社 | 磁気ヘッド |
| US5135818A (en) * | 1989-03-28 | 1992-08-04 | Hitachi Maxell, Ltd. | Thin soft magnetic film and method of manufacturing the same |
| US5287239A (en) * | 1989-07-05 | 1994-02-15 | Kabushiki Kaisha Toshiba | Magnetic head using high saturated magnetic flux density film and manufacturing method thereof |
| US5233492A (en) * | 1989-11-14 | 1993-08-03 | Hitachi Metals, Ltd. | Flying type composite magnetic head having Mn-Zn ferrite core |
| KR100242036B1 (ko) * | 1991-01-08 | 2000-02-01 | 다카노 야스아키 | 자기 헤드 |
| JPH05197903A (ja) * | 1991-10-28 | 1993-08-06 | Canon Inc | 光磁気記録装置 |
| KR960012995B1 (ko) * | 1993-03-31 | 1996-09-25 | 엘지전자 주식회사 | 단결정 페라이트 |
| JP3462019B2 (ja) * | 1996-10-23 | 2003-11-05 | アルプス電気株式会社 | 磁気ヘッド |
| JPH10162308A (ja) * | 1996-11-29 | 1998-06-19 | Alps Electric Co Ltd | 磁気ヘッド |
| JP3517067B2 (ja) * | 1996-11-29 | 2004-04-05 | アルプス電気株式会社 | 磁気ヘッド |
| JP2001338403A (ja) * | 2000-05-25 | 2001-12-07 | Alps Electric Co Ltd | 磁気ヘッドおよび前記磁気ヘッドを使用したディジタル記録および／または再生装置 |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5212219A (en) * | 1975-07-18 | 1977-01-29 | Sony Corp | Method of fusing ferrite by glass |
| JPS5224998A (en) * | 1975-08-16 | 1977-02-24 | Basf Ag | Method of reducing corrosion of reactor for synthetizing chromium dioxide |
| JPS5267609A (en) * | 1975-12-03 | 1977-06-04 | Matsushita Electric Ind Co Ltd | Method for preparation of magnetic hhad |
| JPS5332691A (en) * | 1976-09-07 | 1978-03-28 | Seiko Instr & Electronics Ltd | Long side piezoelectric vibrator |
| JPS5342016A (en) * | 1976-09-28 | 1978-04-17 | Matsushita Electric Ind Co Ltd | Preparation of magnetic head |
| JPS5354199A (en) * | 1976-10-28 | 1978-05-17 | Akai Electric | Process for preparing single crystal ferrite |
| JPS53145825A (en) * | 1977-05-26 | 1978-12-19 | Matsushita Electric Ind Co Ltd | Glass for bonding ferrite |
| JPS5496012A (en) * | 1978-01-13 | 1979-07-30 | Victor Co Of Japan Ltd | Magnetic head |
| JPS54121108A (en) * | 1978-03-13 | 1979-09-20 | Akai Electric | Mnnzn ferrite monocrystal magnetic head and method of fabricating same |
| JPS54143613A (en) * | 1978-04-28 | 1979-11-09 | Hitachi Ltd | Magnetic head and production thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL175473C (nl) * | 1972-06-20 | 1984-11-01 | Matsushita Electric Ind Co Ltd | Ferrietkern voor een magneetkop en werkwijze voor het vervaardigen van een ferrietkern. |
| DE2641319A1 (de) * | 1976-09-14 | 1978-03-16 | Siemens Ag | Ferritkern sowie verfahren zu seiner herstellung |
| JPS55125519A (en) * | 1979-03-23 | 1980-09-27 | Hitachi Ltd | Magnetic head |
-
1980
- 1980-05-16 JP JP6393880A patent/JPS56163518A/ja active Granted
-
1981
- 1981-05-18 US US06/264,706 patent/US4439794A/en not_active Expired - Lifetime
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5212219A (en) * | 1975-07-18 | 1977-01-29 | Sony Corp | Method of fusing ferrite by glass |
| JPS5224998A (en) * | 1975-08-16 | 1977-02-24 | Basf Ag | Method of reducing corrosion of reactor for synthetizing chromium dioxide |
| JPS5267609A (en) * | 1975-12-03 | 1977-06-04 | Matsushita Electric Ind Co Ltd | Method for preparation of magnetic hhad |
| JPS5332691A (en) * | 1976-09-07 | 1978-03-28 | Seiko Instr & Electronics Ltd | Long side piezoelectric vibrator |
| JPS5342016A (en) * | 1976-09-28 | 1978-04-17 | Matsushita Electric Ind Co Ltd | Preparation of magnetic head |
| JPS5354199A (en) * | 1976-10-28 | 1978-05-17 | Akai Electric | Process for preparing single crystal ferrite |
| JPS53145825A (en) * | 1977-05-26 | 1978-12-19 | Matsushita Electric Ind Co Ltd | Glass for bonding ferrite |
| JPS5496012A (en) * | 1978-01-13 | 1979-07-30 | Victor Co Of Japan Ltd | Magnetic head |
| JPS54121108A (en) * | 1978-03-13 | 1979-09-20 | Akai Electric | Mnnzn ferrite monocrystal magnetic head and method of fabricating same |
| JPS54143613A (en) * | 1978-04-28 | 1979-11-09 | Hitachi Ltd | Magnetic head and production thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56163518A (en) | 1981-12-16 |
| US4439794A (en) | 1984-03-27 |
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