JPS5774848A - Signal recording and reproducing device - Google Patents

Signal recording and reproducing device

Info

Publication number
JPS5774848A
JPS5774848A JP14989380A JP14989380A JPS5774848A JP S5774848 A JPS5774848 A JP S5774848A JP 14989380 A JP14989380 A JP 14989380A JP 14989380 A JP14989380 A JP 14989380A JP S5774848 A JPS5774848 A JP S5774848A
Authority
JP
Japan
Prior art keywords
semiconductor layer
angstrom
density
thickness
ratio
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
JP14989380A
Other languages
Japanese (ja)
Inventor
Kenichi Sawazaki
Junichiro Ikeuchi
Shuzo Hirahara
Taiji Higashiyama
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP14989380A priority Critical patent/JPS5774848A/en
Publication of JPS5774848A publication Critical patent/JPS5774848A/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
    • G11B9/08—Recording or reproducing using a method not covered by one of the main groups G11B3/00 - G11B7/00; Record carriers therefor using electrostatic charge injection; Record carriers therefor

Landscapes

  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE:To raise a recording density and also to sufficiently secure the level of a reproducing output and S/N ratio, by selecting an impurity density in a semiconductor layer having an insulating material film provided with a change stroring function, within the range of 10<15>-10<19> pieces/cm<3>. CONSTITUTION:A recording medium 1 is formed like a round disk consisting of a semiconductor layer 2 of Si, etc., an SiO2 film 3 having thickness of about scores of Angstrom , and an Si3N4 film 4 having thickness of about hundreds of Angstrom , and is fixed on a round metallic turntable 5 with the rear side of the semiconductor layer 2 to face downward. When an impurity density of the semiconductor layer 2 is selected within the range of 10<15>-10<19>, a recording density is raised, and also a level of a reproducing output and an S/N ratio are secured sufficiently.
JP14989380A 1980-10-25 1980-10-25 Signal recording and reproducing device Pending JPS5774848A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14989380A JPS5774848A (en) 1980-10-25 1980-10-25 Signal recording and reproducing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14989380A JPS5774848A (en) 1980-10-25 1980-10-25 Signal recording and reproducing device

Publications (1)

Publication Number Publication Date
JPS5774848A true JPS5774848A (en) 1982-05-11

Family

ID=15484921

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14989380A Pending JPS5774848A (en) 1980-10-25 1980-10-25 Signal recording and reproducing device

Country Status (1)

Country Link
JP (1) JPS5774848A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4933926A (en) * 1987-02-13 1990-06-12 Fuji Photo Film Co., Ltd. Image forming medium, method and apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4933926A (en) * 1987-02-13 1990-06-12 Fuji Photo Film Co., Ltd. Image forming medium, method and apparatus

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