JPS57200957A - Electrostatic capacity type information recording carrier - Google Patents

Electrostatic capacity type information recording carrier

Info

Publication number
JPS57200957A
JPS57200957A JP8667281A JP8667281A JPS57200957A JP S57200957 A JPS57200957 A JP S57200957A JP 8667281 A JP8667281 A JP 8667281A JP 8667281 A JP8667281 A JP 8667281A JP S57200957 A JPS57200957 A JP S57200957A
Authority
JP
Japan
Prior art keywords
variation
electrostatic capacity
conductive layer
circuit
microscopic
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
JP8667281A
Other languages
Japanese (ja)
Inventor
Keiji Suzuki
Toshiharu Nozawa
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP8667281A priority Critical patent/JPS57200957A/en
Publication of JPS57200957A publication Critical patent/JPS57200957A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B9/00—Recording or reproducing using a method not covered by one of the main groups G11B3/00 - G11B7/00; Record carriers therefor
    • G11B9/06—Recording or reproducing using a method not covered by one of the main groups G11B3/00 - G11B7/00; Record carriers therefor using record carriers having variable electrical capacitance; Record carriers therefor
    • G11B9/07—Heads for reproducing capacitive information
    • G11B9/075—Heads for reproducing capacitive information using mechanical contact with record carrier, e.g. by stylus

Abstract

PURPOSE:To efficiently detect a variation of resonance frequency, by joining a conductive member which is higher in its conductivity than a conductive layer, to the conductive layer provided in order to reproduce recording information by a variation of electrostatic capacity. CONSTITUTION:A metallic plate 301 having high electric conductivity such as copper, etc. is provided in one body in the inside of a conductive layer 101, and its thickness is regulated to 0.1-1mm.. When a reproducing stylus 202 having a microscopic metallic electrode 201 is brought into contact with a disk 401 and a variation of electrostatic capacity between the disk 401 and the microscopic metallic electrode 201 is detected as a variation of resonance frequency of a resonance circuit 205, it is realized to reproduce information recorded by a bit 103. The conductive layer 101 is operated only as a conductor in a small distance from a surface insulating layer 102 under the microscopic electrode 201 to the metallic conductive plate 301. Accordingly, circuit resistance of the resonance circuit 205 is small and a Q value of the circuit can be elevated, therefore, a variation of resonance frequency due to a change of the electrostatic capacity can be detected efficiently and by a low noise.
JP8667281A 1981-06-04 1981-06-04 Electrostatic capacity type information recording carrier Pending JPS57200957A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8667281A JPS57200957A (en) 1981-06-04 1981-06-04 Electrostatic capacity type information recording carrier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8667281A JPS57200957A (en) 1981-06-04 1981-06-04 Electrostatic capacity type information recording carrier

Publications (1)

Publication Number Publication Date
JPS57200957A true JPS57200957A (en) 1982-12-09

Family

ID=13893517

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8667281A Pending JPS57200957A (en) 1981-06-04 1981-06-04 Electrostatic capacity type information recording carrier

Country Status (1)

Country Link
JP (1) JPS57200957A (en)

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