[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

JPS55108922A - Magnetic head - Google Patents

Magnetic head

Info

Publication number
JPS55108922A
JPS55108922A JP1329879A JP1329879A JPS55108922A JP S55108922 A JPS55108922 A JP S55108922A JP 1329879 A JP1329879 A JP 1329879A JP 1329879 A JP1329879 A JP 1329879A JP S55108922 A JPS55108922 A JP S55108922A
Authority
JP
Japan
Prior art keywords
crystallized glass
glass material
heat treatment
head gap
magnetic cores
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
JP1329879A
Other languages
Japanese (ja)
Inventor
Kiyoshi Kurakane
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.)
TDK Corp
Original Assignee
TDK Corp
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.)
Filing date
Publication date
Application filed by TDK Corp filed Critical TDK Corp
Priority to JP1329879A priority Critical patent/JPS55108922A/en
Publication of JPS55108922A publication Critical patent/JPS55108922A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To improve resistance to slide wear and strength of a magnetic head by using a crystallized glass to constitute the head gap. CONSTITUTION:Crystallized glass material 2' is stuck to joint faces 4A and 4B of magnetic cores 1A and 1B by sputtering. Next, in the first heat treatment process, magnetic cores 1A and 1B are joined to each other, and crystallized glass material 2' is melted at a melting temperature over 800 deg.C while applying pressure. Next, in the second heat treatment process, crystallized glass material 2' is subjected to heat treatment again at a crystallizing temperature of about 700 deg.C without pressure applying, thereby forming crystallized glass including minute crystal particles in the gap between magnetic cores 1A and 1B tips, namely, the head gap. As a result, resistance to slide wear and mechanical sterngth of the head gap is improved. Further, thickness of crystallized glass material 2' dependent upon sputtering can be controlled with a high precision, so that the head gap can be set with a high precision and can be thin.
JP1329879A 1979-02-09 1979-02-09 Magnetic head Pending JPS55108922A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1329879A JPS55108922A (en) 1979-02-09 1979-02-09 Magnetic head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1329879A JPS55108922A (en) 1979-02-09 1979-02-09 Magnetic head

Publications (1)

Publication Number Publication Date
JPS55108922A true JPS55108922A (en) 1980-08-21

Family

ID=11829270

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1329879A Pending JPS55108922A (en) 1979-02-09 1979-02-09 Magnetic head

Country Status (1)

Country Link
JP (1) JPS55108922A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0197532A2 (en) * 1985-04-08 1986-10-15 Matsushita Electric Industrial Co., Ltd. Magnetic head
JPS6448212A (en) * 1987-08-18 1989-02-22 Victor Company Of Japan Production of magnetic head
JPH0244509A (en) * 1988-08-03 1990-02-14 Matsushita Electric Ind Co Ltd Magnetic head and its manufacture
US5170301A (en) * 1988-08-03 1992-12-08 Matsushita Electric Industrial Co., Ltd. Magnetic head having core parts joined by low-melting point crystallized glass with composite gap

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0197532A2 (en) * 1985-04-08 1986-10-15 Matsushita Electric Industrial Co., Ltd. Magnetic head
US4847983A (en) * 1985-04-08 1989-07-18 Matsushita Electric Industrial Co., Ltd. Method of making a crystallized glass-bonded amorphous metal magnetic film-non-magnetic substrate magnetic head
US4947542A (en) * 1985-04-08 1990-08-14 Matsushita Electric Industrial Co., Ltd. Method of making a crystallized glass-bonded amorphous metal magnetic film-non-magnetic substrate magnetic head
US4964007A (en) * 1985-04-08 1990-10-16 Matsushita Electric Industrial Co., Ltd. Crystallized glass-bonded amorphous metal magnetic film-non-magnetic substrate magnetic head
JPS6448212A (en) * 1987-08-18 1989-02-22 Victor Company Of Japan Production of magnetic head
JPH0244509A (en) * 1988-08-03 1990-02-14 Matsushita Electric Ind Co Ltd Magnetic head and its manufacture
US5170301A (en) * 1988-08-03 1992-12-08 Matsushita Electric Industrial Co., Ltd. Magnetic head having core parts joined by low-melting point crystallized glass with composite gap

Similar Documents

Publication Publication Date Title
ES445617A1 (en) Novel silicon crystals and process for their preparation
JPS57116304A (en) Optical fiber for infrared and its production
EP0444209A4 (en) Thin film of lithium niobate single crystal and production thereof
JPS55108922A (en) Magnetic head
GB1447817A (en) Acousto-optical filters
JPS646537A (en) Manufacture of spring made of ceramic
JPS5214600A (en) Process for the production of a thin film of silicon carbide
JPS5654622A (en) Magnetic head and its manufacture
JPS6251206B2 (en)
JPS5683828A (en) Magnetic head and its production
JPS6487597A (en) Production of single crystal ferrite
JPS5328600A (en) Production of oxide single crystal for surface-wave and piezoelectric application
JPS6418985A (en) Production of oxide single crystal
JPS6452344A (en) Processing method for oxide or ceramic superconductor into wire
JPS55125525A (en) Magnetic head
JPS5673637A (en) Manufacture of optical transmission material
JPS5593521A (en) Production of magnetic head
JPS5733419A (en) Magnetic head
JP2553497B2 (en) Method of manufacturing magnetic head
JPS55154574A (en) Forming method of film of high melting point substance
JPS6475673A (en) Composite sputter target
JPS58145699A (en) Method for making single domain of lithium niobate single crystal
Remizov Numerical Examination of Flow and Heat and Mass Transfer in the Melt in Growing Crystals by the Czochralski Method
JPS55158985A (en) Ink jet head
JPS533902A (en) Production of silicon crystal membrane

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20050309

A131 Notification of reasons for refusal

Effective date: 20070417

Free format text: JAPANESE INTERMEDIATE CODE: A131

A601 Written request for extension of time

Free format text: JAPANESE INTERMEDIATE CODE: A601

Effective date: 20070713

A602 Written permission of extension of time

Effective date: 20070827

Free format text: JAPANESE INTERMEDIATE CODE: A602

A601 Written request for extension of time

Effective date: 20070815

Free format text: JAPANESE INTERMEDIATE CODE: A601

A602 Written permission of extension of time

Free format text: JAPANESE INTERMEDIATE CODE: A602

Effective date: 20070921

A521 Written amendment

Effective date: 20070918

Free format text: JAPANESE INTERMEDIATE CODE: A523

A131 Notification of reasons for refusal

Effective date: 20080212

Free format text: JAPANESE INTERMEDIATE CODE: A131

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20080509

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20080909

A601 Written request for extension of time

Free format text: JAPANESE INTERMEDIATE CODE: A601

Effective date: 20081209

A602 Written permission of extension of time

Effective date: 20090126

Free format text: JAPANESE INTERMEDIATE CODE: A602

A521 Written amendment

Effective date: 20090108

Free format text: JAPANESE INTERMEDIATE CODE: A523

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20091222

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20100121

FPAY Renewal fee payment (prs date is renewal date of database)

Year of fee payment: 3

Free format text: PAYMENT UNTIL: 20130129

R150 Certificate of patent (=grant) or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140129

Year of fee payment: 4

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250