JPS5448504A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
JPS5448504A
JPS5448504A JP11372477A JP11372477A JPS5448504A JP S5448504 A JPS5448504 A JP S5448504A JP 11372477 A JP11372477 A JP 11372477A JP 11372477 A JP11372477 A JP 11372477A JP S5448504 A JPS5448504 A JP S5448504A
Authority
JP
Japan
Prior art keywords
magnetic
magnetic recording
recording medium
oersted
gauss
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
JP11372477A
Other languages
Japanese (ja)
Inventor
Hiroshi Kawahara
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 JP11372477A priority Critical patent/JPS5448504A/en
Publication of JPS5448504A publication Critical patent/JPS5448504A/en
Pending legal-status Critical Current

Links

Landscapes

  • Paints Or Removers (AREA)
  • Magnetic Record Carriers (AREA)

Abstract

PURPOSE: To make possible use with ordinary chrome bias and yet improve recording sensitivity and dynamic range and prevent output variations by specifying the coercive forces of the first and second layers of a double coated magnetic recording tape and its Br and coating thicknesses.
CONSTITUTION: A first magnetic layer of coercive force (x); 400 to 560 Oersted, residual magnetic flux density (y); (1.60x+556) gauss or over, thickness; 3 to 6μ is provided on a non-magnetic substrate and further a second magnetic layer composed of cobalt adsorbed γ-Fe2O3 of coercive force; 590 to 800 Oersted, residual magnetic flux density; 1200 gauss or over, thickness; 1.5 to 3μ is provided thereon to form the magnetic recording medium. The equalizer used at the reproduction of the abovementioned magnetic recording medium can be one of 70 microseconds and the tape is usable with ordinary decks with chrome position
COPYRIGHT: (C)1979,JPO&Japio
JP11372477A 1977-09-21 1977-09-21 Magnetic recording medium Pending JPS5448504A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11372477A JPS5448504A (en) 1977-09-21 1977-09-21 Magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11372477A JPS5448504A (en) 1977-09-21 1977-09-21 Magnetic recording medium

Publications (1)

Publication Number Publication Date
JPS5448504A true JPS5448504A (en) 1979-04-17

Family

ID=14619526

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11372477A Pending JPS5448504A (en) 1977-09-21 1977-09-21 Magnetic recording medium

Country Status (1)

Country Link
JP (1) JPS5448504A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5817539A (en) * 1981-07-21 1983-02-01 Sony Corp Magnetic recording medium
WO1983000767A1 (en) * 1981-08-20 1983-03-03 Ohtsuki, Akira Two-layer coated magnetic recording medium
WO1983001145A1 (en) * 1981-09-28 1983-03-31 Kubota, Isao Magnetic recording medium
JPS5856228A (en) * 1981-09-28 1983-04-02 Sony Corp Magnetic recording medium
US4624883A (en) * 1983-03-20 1986-11-25 Hitachi Maxell, Ltd. Magnetic recording medium
JPH02260232A (en) * 1989-03-31 1990-10-23 Konica Corp Magnetic recording medium and production thereof
US5597638A (en) * 1993-01-13 1997-01-28 Fuji Photo Film Co., Ltd. Magnetic recording medium

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5421304A (en) * 1977-07-18 1979-02-17 Fuji Photo Film Co Ltd Double layer magnetic recording tape

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5421304A (en) * 1977-07-18 1979-02-17 Fuji Photo Film Co Ltd Double layer magnetic recording tape

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5817539A (en) * 1981-07-21 1983-02-01 Sony Corp Magnetic recording medium
JPH036575B2 (en) * 1981-07-21 1991-01-30 Sony Corp
WO1983000767A1 (en) * 1981-08-20 1983-03-03 Ohtsuki, Akira Two-layer coated magnetic recording medium
WO1983001145A1 (en) * 1981-09-28 1983-03-31 Kubota, Isao Magnetic recording medium
JPS5856228A (en) * 1981-09-28 1983-04-02 Sony Corp Magnetic recording medium
JPH036576B2 (en) * 1981-09-28 1991-01-30 Sony Corp
US4624883A (en) * 1983-03-20 1986-11-25 Hitachi Maxell, Ltd. Magnetic recording medium
JPH02260232A (en) * 1989-03-31 1990-10-23 Konica Corp Magnetic recording medium and production thereof
US5597638A (en) * 1993-01-13 1997-01-28 Fuji Photo Film Co., Ltd. Magnetic recording medium

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