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Master information carrier, process for producing the carrier, and method and apparatus for recording master information signal on magnetic recording medium by using the carrier 원문보기

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • G11B-005/86
출원번호 US-0101590 (1998-07-13)
우선권정보 JP-0191889 (1996-07-22); JP-0075703 (1997-03-27); JP-0133897 (1997-05-23); JP-0124257 (1997-05-14)
국제출원번호 PCT/JP97/02519 (1997-07-18)
§371/§102 date 19980713 (19980713)
국제공개번호 WO98/03972 (1998-01-29)
발명자 / 주소
  • Tatsuaki Ishida JP
  • Ryuji Sugita JP
  • Kiyokazu Tohma JP
  • Keizou Miyata JP
  • Hiroshi Ryonai JP
출원인 / 주소
  • Matsushita Electric Industrial Co., Ltd. JP
대리인 / 주소
    Merchant & Gould P.C.
인용정보 피인용 횟수 : 139  인용 특허 : 11

초록

A master information carrier comprises a substrate whose surface has an embossed pattern corresponding to an information signal. At least a surface of the protruding portion of the embossed pattern is made of a ferromagnetic material. A method for writing an information signal into a sheet or disk m

대표청구항

1. A master information carrier for writing an information signal into a magnetic record medium, wherein an embossed pattern corresponding to the information signal is formed on a substrate, at least a protruding portion of the embossed pattern is composed of a ferromagnetic material layer having a

이 특허에 인용된 특허 (11)

  1. Belser Karl A. (Los Gatos CA) Makansi Tarek (Pleasanton CA) Sanders Ian L. (Morgan Hill CA), Discrete track thin film magnetic recording disk with embedded servo information.
  2. Morita Osamu,JPX, Magnetic disc and magnetic disc drive.
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  4. Oyanagi Eiki,JPX ; Morita Osamu,JPX, Magnetic disk and magnetic disk unit.
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  6. Sawazaki Norikazu (Kawasaki JPX), Magnetic transcription-recording method.
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  9. Higashiyama Yasushi (Yokohama JPX) Chiba Shu (Yokohama JPX) Sawazaki Norikazu (Yokohama JPX), Optical magnetic recording device.
  10. Lazzari Jean-Pierre (Corenc FRX), Substrate for magnetic disk memory and production process.
  11. Bonyhard Peter I., Using servowriter medium for quickly written servo-patterns on magnetic media.

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