DE3583619D1 - Magnetkopfkern und herstellungsverfahren. - Google Patents

Magnetkopfkern und herstellungsverfahren.

Info

Publication number: DE3583619D1
Authority: DE; Germany
Prior art keywords: production method; magnetic head; head core; core; magnetic
Prior art date: 1984-01-14
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 - Lifetime

Application number

DE8585300017T

Other languages

English (en)

Inventor

Soichiro Matsuzawa

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.)

NGK Insulators Ltd

Original Assignee

NGK Insulators Ltd

Priority date (The priority date 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 date listed.)

1984-01-14

Filing date

1985-01-02

Publication date

1991-09-05

1984-01-14 Priority claimed from JP59005203A external-priority patent/JPH0740334B2/ja

1984-01-14 Priority claimed from JP59005204A external-priority patent/JPS60150215A/ja

1985-01-02 Application filed by NGK Insulators Ltd filed Critical NGK Insulators Ltd

1991-09-05 Application granted granted Critical

1991-09-05 Publication of DE3583619D1 publication Critical patent/DE3583619D1/de

2005-01-03 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

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
- G11B5/187—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features
- G11B5/23—Gap features
- G11B5/232—Manufacture of gap
- 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
- 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
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/4902—Electromagnet, transformer or inductor
- Y10T29/49021—Magnetic recording reproducing transducer [e.g., tape head, core, etc.]
- Y10T29/49032—Fabricating head structure or component thereof
- Y10T29/49048—Machining magnetic material [e.g., grinding, etching, polishing]
- 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
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/4902—Electromagnet, transformer or inductor
- Y10T29/49021—Magnetic recording reproducing transducer [e.g., tape head, core, etc.]
- Y10T29/49032—Fabricating head structure or component thereof
- Y10T29/49055—Fabricating head structure or component thereof with bond/laminating preformed parts, at least two magnetic
- Y10T29/49057—Using glass bonding material

Landscapes

Engineering & Computer Science (AREA)
Manufacturing & Machinery (AREA)
Magnetic Heads (AREA)

DE8585300017T 1984-01-14 1985-01-02 Magnetkopfkern und herstellungsverfahren. Expired - Lifetime DE3583619D1 (de)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
JP59005203A JPH0740334B2 (ja)	1984-01-14	1984-01-14	磁気ヘッド用コア製造用コア前駆体
JP59005204A JPS60150215A (ja)	1984-01-14	1984-01-14	複合型磁気ヘツド用コアの製造法

Publications (1)

Publication Number	Publication Date
DE3583619D1 true DE3583619D1 (de)	1991-09-05

Family

ID=26339107

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
DE8585300017T Expired - Lifetime DE3583619D1 (de)	1984-01-14	1985-01-02	Magnetkopfkern und herstellungsverfahren.

Country Status (6)

Country	Link
US (2)	US4711018A (de)
EP (1)	EP0149509B1 (de)
DE (1)	DE3583619D1 (de)
HK (1)	HK17892A (de)
PH (1)	PH26884A (de)
SG (1)	SG7492G (de)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE3602654C2 (de) *	1985-01-30	1997-11-27	Mitsubishi Electric Corp	Verfahren zur Bildung einer Verbund-Magnetkopf-Stuktur und Verbund-Magnetkopf-Struktur
KR900000627B1 (ko) *	1985-03-22	1990-02-01	알프스 덴기 가부시기가이샤	복합형 자기헤드 및 그 제조방법
DE3529623A1 (de) *	1985-08-19	1987-02-19	Grundig Emv	Verfahren zur gleichzeitigen herstellung zweier zugeordneter magnetkoepfe fuer videogeraete
JPH01251405A (ja) *	1988-03-31	1989-10-06	Ngk Insulators Ltd	磁気ヘッド用コア
JPH02201714A (ja) *	1989-01-31	1990-08-09	Pioneer Electron Corp	磁気ヘッド
US5245492A (en) *	1989-11-28	1993-09-14	Matsushita Electric Industrial Co., Ltd.	Magnetic head
US5224001A (en) *	1989-11-29	1993-06-29	Matsushita Electric Industrial Co., Ltd.	Magnetic head
US5276578A (en) *	1990-03-13	1994-01-04	Canon Denshi Kabushiki Kaisha	Magnetic head having a pair of front core assemblies
US5309306A (en) *	1991-06-10	1994-05-03	Mitsubishi Denki Kabushiki Kaisha	Complex magnetic head
US5267392A (en) *	1992-03-04	1993-12-07	Ampex Systems Corporation	Method of manufacturing a laminated high frequency magnetic transducer
DE69328516T2 (de)	1992-05-28	2000-08-31	Minebea Co.,Ltd.	Schwebender Magnetkopf
EP0650628B1 (de) *	1992-07-17	1997-09-24	Ampex Systems Corporation	Zusammengesetzter metall- und ferritwandlerkopf und herstellungsverfahren dafür
JP2952455B2 (ja) *	1992-10-30	1999-09-27	ミネベア株式会社	浮動磁気ヘッド
DE69323480T2 (de) *	1992-12-14	1999-06-24	Minebea Co. Ltd., Kitasaku, Nagano	Schwebender Magnetkopf
US6061212A (en) *	1995-05-18	2000-05-09	Matsushita Electric Industrial Co., Ltd.	Magnetic head with circular notches and magnetic recording/reproducing apparatus using the same
EP0768640A3 (de) *	1995-10-13	1998-11-11	Ampex Corporation	Magnetkopf mit kleinem Kern und nicht magnetischem Seitenträger
JPH10247309A (ja) *	1997-03-05	1998-09-14	Matsushita Electric Ind Co Ltd	回転ヘッド装置の製造方法，磁気ヘッドユニットの製造方法，回転ヘッド装置および磁気ヘッドユニット
JP3524421B2 (ja) *	1999-03-12	2004-05-10	アルプス電気株式会社	磁気ヘッド
WO2000074040A1 (en) *	1999-05-27	2000-12-07	Utm Systems Corp.	Thin magnetic medium read head
JP2002312907A (ja) *	2001-04-13	2002-10-25	Sony Corp	磁気ヘッドおよびその製造方法
US7199957B2 (en) *	2004-03-30	2007-04-03	Imation Corp.	Write head alignment for full amplitude time-based servo

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
GB116451A (en) *	1917-11-03	1918-06-13	Harold Joseph Charle Forrester	Improvements in Brushes.
FR2075466A5 (de) *	1970-01-29	1971-10-08	Ibm
JPS53123913A (en) *	1977-04-05	1978-10-28	Olympus Optical Co Ltd	Magnetic head and production of the same
JPS5690470A (en) *	1979-12-05	1981-07-22	Xerox Corp	Memory actuator
JPS57114899A (en) *	1981-01-07	1982-07-16	Tokyo Shibaura Electric Co	Method of processing metal sodium containing radioactive material
JPS57205817A (en) *	1981-06-12	1982-12-17	Sony Corp	Joining method of ferrite
JPS595417A (ja) *	1982-07-01	1984-01-12	Sharp Corp	磁気ヘツドの製造方法
US4611259A (en) *	1983-02-08	1986-09-09	Ampex Corporation	Magnetic transducer structure having reduced track width and a method of manufacturing thereof
JPS60150215A (ja) *	1984-01-14	1985-08-07	Ngk Insulators Ltd	複合型磁気ヘツド用コアの製造法
JPH0740334B2 (ja) *	1984-01-14	1995-05-01	日本碍子株式会社	磁気ヘッド用コア製造用コア前駆体

1985
- 1985-01-02 EP EP85300017A patent/EP0149509B1/de not_active Expired - Lifetime
- 1985-01-02 DE DE8585300017T patent/DE3583619D1/de not_active Expired - Lifetime
- 1985-01-02 US US06/688,502 patent/US4711018A/en not_active Expired - Lifetime
- 1985-01-11 PH PH31707A patent/PH26884A/en unknown
1987
- 1987-09-23 US US07/100,230 patent/US4839763A/en not_active Expired - Lifetime
1992
- 1992-01-25 SG SG74/92A patent/SG7492G/en unknown
- 1992-03-05 HK HK178/92A patent/HK17892A/en not_active IP Right Cessation

Also Published As

Publication number	Publication date
EP0149509A2 (de)	1985-07-24
US4711018A (en)	1987-12-08
US4839763A (en)	1989-06-13
HK17892A (en)	1992-03-13
PH26884A (en)	1992-11-16
SG7492G (en)	1992-03-20
EP0149509B1 (de)	1991-07-31
EP0149509A3 (en)	1987-04-01

Publication	Publication Date	Title
DE3668722D1 (de)	1990-03-08	Magnetkern und herstellungsverfahren.
KR840008862A (ko)	1984-12-19	자기 헤드 및 그 제조방법
DE3583619D1 (de)	1991-09-05	Magnetkopfkern und herstellungsverfahren.
KR850000101A (ko)	1985-02-25	복합형 자기헤드 및 그 제조방법
DE3481953D1 (de)	1990-05-17	Magnetkopfkern und herstellungsverfahren.
DE3482609D1 (de)	1990-08-02	Magnetkopf und dessen herstellungsverfahren.
DE3579513D1 (de)	1990-10-11	Magnetische kernresonanzmethode und vorrichtung.
KR890013608A (ko)	1989-09-25	자기 헤드 및 그 제조 방법
DE3581694D1 (de)	1991-03-14	Magnetkopf und herstellungsverfahren.
KR910001731A (ko)	1991-01-31	자기헤드용 서스펜션 및 그 제조방법
DE3482516D1 (de)	1990-07-19	Magnetkopfkern und herstellungsverfahren.
DE3586873D1 (de)	1993-01-14	Magnetkopfanordnung.
GB2201540B (en)	1991-09-04	Magnetic head and method for the production thereof
DE3681679D1 (de)	1991-10-31	Thermomagnetischer aufnahmekopf und herstellungsverfahren.
GB2169124B (en)	1988-09-14	Composite type magnetic head and manufacturing method thereof
DE3586990D1 (de)	1993-02-25	Kombinierter magnetkopf.
DE3584607D1 (de)	1991-12-12	Magnetkopf.
GB2113897B (en)	1985-10-09	Multi-track magnetic head and method of fabricating the same
KR860005334A (ko)	1986-07-21	자기 헤드
DE68917507D1 (de)	1994-09-22	Schwebender Magnetkopf und Herstellungsverfahren.
KR850005670A (ko)	1985-08-28	자기헤드용 코어
IT8622643A0 (it)	1986-12-11	Testa per bambola e metodo per lasua fabbricazione.
DE3381706D1 (de)	1990-08-09	Amorpher magnetkopf und herstellungsverfahren.
KR850003023A (ko)	1985-05-28	합금자기헤드 및 그 제조방법
KR880004429A (ko)	1988-06-07	자기헤드 코어 및 그 제조방법

Legal Events

Date	Code	Title	Description
1992-08-27	8364	No opposition during term of opposition