JPS57130232A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
JPS57130232A
JPS57130232A JP56015301A JP1530181A JPS57130232A JP S57130232 A JPS57130232 A JP S57130232A JP 56015301 A JP56015301 A JP 56015301A JP 1530181 A JP1530181 A JP 1530181A JP S57130232 A JPS57130232 A JP S57130232A
Authority
JP
Japan
Prior art keywords
recording medium
magnetic recording
vapor
metal
base film
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.)
Granted
Application number
JP56015301A
Other languages
Japanese (ja)
Other versions
JPH0319609B2 (en
Inventor
Seiji Nishioka
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.)
Maxell Holdings Ltd
Original Assignee
Hitachi Maxell 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.)
Filing date
Publication date
Application filed by Hitachi Maxell Ltd filed Critical Hitachi Maxell Ltd
Priority to JP56015301A priority Critical patent/JPS57130232A/en
Publication of JPS57130232A publication Critical patent/JPS57130232A/en
Publication of JPH0319609B2 publication Critical patent/JPH0319609B2/ja
Granted 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
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/73—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer
    • G11B5/7368—Non-polymeric layer under the lowermost magnetic recording layer

Abstract

PURPOSE:To decrease light transmissivity by providing a metal vapor-deposited film on the surface of a base film. CONSTITUTION:On the surface of a base film 1 of polyester, etc., a vapor-deposited film 2 (of favorably 0.01-0.2mum) of metal, such as aluminum, zinc, tin, lead, copper, and silver, is provided and on it, a magnetic layer 3 is further formed.
JP56015301A 1981-02-03 1981-02-03 Magnetic recording medium Granted JPS57130232A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56015301A JPS57130232A (en) 1981-02-03 1981-02-03 Magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56015301A JPS57130232A (en) 1981-02-03 1981-02-03 Magnetic recording medium

Publications (2)

Publication Number Publication Date
JPS57130232A true JPS57130232A (en) 1982-08-12
JPH0319609B2 JPH0319609B2 (en) 1991-03-15

Family

ID=11884983

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56015301A Granted JPS57130232A (en) 1981-02-03 1981-02-03 Magnetic recording medium

Country Status (1)

Country Link
JP (1) JPS57130232A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4546036A (en) * 1983-12-22 1985-10-08 Minnesota Mining And Manufacturing Company Magnetic recording medium having opaque polyester film base
JPS6139221A (en) * 1984-07-27 1986-02-25 Toshiba Corp Magnetic recording medium
US4603073A (en) * 1983-12-22 1986-07-29 Minnesota Mining And Manufacturing Company Opaque polyester film containing fine carbon black particles

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021177421A1 (en) 2020-03-05 2021-09-10 日本山村硝子株式会社 Medical fixing tool

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5249806A (en) * 1975-10-20 1977-04-21 Fujitsu Ltd Substrate for magnetic discs

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5249806A (en) * 1975-10-20 1977-04-21 Fujitsu Ltd Substrate for magnetic discs

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4546036A (en) * 1983-12-22 1985-10-08 Minnesota Mining And Manufacturing Company Magnetic recording medium having opaque polyester film base
US4603073A (en) * 1983-12-22 1986-07-29 Minnesota Mining And Manufacturing Company Opaque polyester film containing fine carbon black particles
JPS6139221A (en) * 1984-07-27 1986-02-25 Toshiba Corp Magnetic recording medium

Also Published As

Publication number Publication date
JPH0319609B2 (en) 1991-03-15

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