GB1476943A - Magnetic recording and playback heads - Google Patents

Magnetic recording and playback heads

Info

Publication number
GB1476943A
GB1476943A GB3752974A GB3752974A GB1476943A GB 1476943 A GB1476943 A GB 1476943A GB 3752974 A GB3752974 A GB 3752974A GB 3752974 A GB3752974 A GB 3752974A GB 1476943 A GB1476943 A GB 1476943A
Authority
GB
United Kingdom
Prior art keywords
head
gap
coating
magnetic
working surface
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
Application number
GB3752974A
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of GB1476943A publication Critical patent/GB1476943A/en
Expired legal-status Critical Current

Links

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
    • G11B5/255—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features comprising means for protection against wear

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Magnetic Heads (AREA)
  • Coating By Spraying Or Casting (AREA)

Abstract

1476943 Magnetic heads SIEMENS AG 28 Aug 1974 [4 Sept 1973] 37529/74 Heading G5R In the manufacture of a magnetic read or write head for use with magnetic tape and which has a transducing gap between two polepieces, a coating of non-magnetic ceramic material 9 is deposited on the working surface of the head and thereafter this coating is removed from the transducing gap and from zones of the working surface immediately adjoining the gap and located one in front and one behind the gap as seen in the direction of tape movement in use of the head, a thin layer of a metal which acts to promote adhesion between the working surface and said coating being applied, prior to said deposition, at least to those areas of the working surface which are still covered by said coating at the end of the removal step. The working face of the head is formed with a recess on either side of the gap prior to the application of the metal layer, whereby in the finished head the ceramic material 9 only fills said recesses. The metal layer may be 0.05 mm. thick and of tungsten and the ceramic coating may be a mixture of abour 60% by weight aluminum oxide and 40% titanium. Both layers may be applied by plasma spraying and the pores and gaps of the ceramic material may be filled by impregnation with a homogeneous material such as an epoxy or polyacrylodiester resin. The head may be a multitrack head in which the pole-pieces and gap-forming non-magnetic foils are located in the screwed-together halves of a brass housing.
GB3752974A 1973-09-04 1974-08-28 Magnetic recording and playback heads Expired GB1476943A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19732344561 DE2344561C3 (en) 1973-09-04 1973-09-04 Low-wear magnetic head

Publications (1)

Publication Number Publication Date
GB1476943A true GB1476943A (en) 1977-06-16

Family

ID=5891588

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3752974A Expired GB1476943A (en) 1973-09-04 1974-08-28 Magnetic recording and playback heads

Country Status (6)

Country Link
BE (1) BE819521A (en)
DE (1) DE2344561C3 (en)
FR (1) FR2242743B1 (en)
GB (1) GB1476943A (en)
IT (1) IT1020276B (en)
NL (1) NL168982C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2129600A (en) * 1982-10-25 1984-05-16 Sony Corp Methods of manufacturing magnetic thin film transducer heads

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2741470B1 (en) * 1995-11-22 1998-01-02 Commissariat Energie Atomique METHOD FOR PRODUCING A PLANAR MAGNETIC HEAD AND HEAD OBTAINED BY THIS PROCESS
US4130847A (en) * 1977-03-31 1978-12-19 International Business Machines Corporation Corrosion resistant thin film head assembly and method for making
US4745509A (en) * 1981-08-21 1988-05-17 Matsushita Electric Industrial Company, Limited Magnetic head with improved supporter for perpendicular magnetization recording
JPS59152515A (en) * 1983-02-18 1984-08-31 Victor Co Of Japan Ltd Vertical magnetization type magnetic head
DE3307776A1 (en) * 1983-03-04 1984-09-06 Siemens AG, 1000 Berlin und 8000 München RECORDING ARRANGEMENT FOR A MAGNETIC LAYER

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2129600A (en) * 1982-10-25 1984-05-16 Sony Corp Methods of manufacturing magnetic thin film transducer heads

Also Published As

Publication number Publication date
DE2344561B2 (en) 1977-12-29
FR2242743B1 (en) 1977-11-04
BE819521A (en) 1975-03-04
NL168982B (en) 1981-12-16
DE2344561A1 (en) 1975-04-17
FR2242743A1 (en) 1975-03-28
DE2344561C3 (en) 1978-08-31
NL168982C (en) 1982-05-17
NL7410743A (en) 1975-03-06
IT1020276B (en) 1977-12-20

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee