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Glass substrate for information recording medium and magnetic information recording medium to which the glass substrate is applied

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • C03C-003/085
  • C03C-003/091
  • G11B-007/241
출원번호 US-0656512 (2010-02-01)
등록번호 US-8222170 (2012-07-17)
우선권정보 JP-2001-165226 (2001-05-31)
발명자 / 주소
  • Ikenishi, Mikio
  • Morita, Atsuko
  • Zou, Xuelu
출원인 / 주소
  • Hoya Corporation
대리인 / 주소
    Nixon & Vanderhye P.C.
인용정보 피인용 횟수 : 4  인용 특허 : 28

초록

Disclosed are a glass substrate for an information recording medium, having excellent scratch resistance and a light weight and having high fracture toughness, the glass substrate having a fragility index value, measured in water, of 12 μm−1/2 or less or having a fragility index value, measured in a

대표청구항

1. A magnetic information recording medium comprising a magnetic recording layer formed on a glass substrate for an information recording medium, said glass substrate comprising, by mol %, 40 to 74.5% of SiO2, 7.5 to 15% of Al2O3, 1% or more MgO as RO, 0 to 25% of B2O3, the total content of Al2O3 an

이 특허에 인용된 특허 (28)

  1. Zou Xuelu,JPX ; Azegami Kouji,JPX, Crystallized glass for information recording medium, crystallized glass substrate, and information recording medium using the crystallized glass substrate.
  2. Zou, Xuelu; Uchida, Katsuaki, Crystallized glass substrate for information recording medium.
  3. Tadashi Muramoto JP; Shinichi Aratani JP, Glass composition and ion exchange strengthened glass article produced from same.
  4. Akihiro Koyama JP; Shoichi Kishimoto JP; Junji Kurachi JP; Nobuyuki Yamamoto JP, Glass composition and process for producing the same.
  5. Shoichi Kishimoto JP; Akihiro Koyama JP; Junji Kurachi JP; Nobuyuki Yamamoto JP, Glass composition and substrate for information recording medium.
  6. Tetsuya Nakashima JP; Yasumasa Nakao JP; Akio Koike JP, Glass for a data storage medium substrate and glass substrate for data storage media.
  7. Speit Burkhard,DEX ; Westenberger Gerhard,DEX, Glass for rigid disk substrates.
  8. Yamamoto, Hiroki; Namekawa, Takashi; Naito, Takashi; Suzuki, Yasutaka; Kato, Akira; Takeo, Noriyuki; Akamatsu, Kiyoshi; Inomata, Youichi; Terakado, Masatomo; Takahashi, Ken, Glass substrate for a magnetic disk, a magnetic disk which can be formed with a stable texture.
  9. Ikenishi, Mikio; Morita, Atsuko; Zou, Xuelu, Glass substrate for information recording medium and magnetic information recording medium to which the glass substrate is applied.
  10. Ikenishi,Mikio; Morita,Atsuko; Zou,Xuelu, Glass substrate for information recording medium and magnetic information recording medium to which the glass substrate is applied.
  11. Takeuchi Kunio,JPX ; Kitayama Teruki,JPX, Glass substrate for information recording medium and magnetic recording medium having the substrate.
  12. Zou Xuelu,JPX ; Toratani Hisayoshi,JPX, Glass substrate for magnetic recording medium and method of manufacturing the same.
  13. Yamamoto Hiroki,JPX ; Naito Takashi,JPX ; Namekawa Takashi,JPX ; Takahashi Ken,JPX ; Watanabe Masahiro,JPX ; Takeo Noriyuki,JPX, Glass substrate of disk for recording information, a disk for recording information, and a disk device for recording information.
  14. Goto Naoyuki (Sagamihara JPX) Yamaguchi Katsuhiko (Sagamihara JPX), Glass-ceramic for magnetic disks and method for manufacturing the same.
  15. Speit Burkhard,DEX ; Wolff Silke,DEX ; Brix Peter,DEX ; Gierke Monika,DEX, Glasses and glass-ceramics with high E-moduli.
  16. Wolfgang Pannhorst DE; Ute Woelfel DE; Silke Wolff DE, Glasses and glass-ceramics with high specific young's modulus and their applications.
  17. Nakagawa Kenji (Tokorozawa JA) Itaya Ko (Tokorozawa JA), High strength glass made by ion exchange.
  18. Kataoka, Mariko; Goto, Naoyuki; Nakajima, Kousuke; Ishioka, Junko; Yamaguchi, Katsuhiko; Yagi, Toshitaka, Holding member for information storage disk and information storage disk drive device.
  19. Junji Kurachi JP; Akihiro Koyama JP; Nobuyuki Yamamoto JP; Yasuhiro Saito JP; Kazuishi Mitani JP; Koichi Ataka JP; Yoshihiro Matsuno JP, Hydrofluoric acid etched substrate for information recording medium.
  20. Tachiwana Kazuo,JPX, Information recording medium.
  21. Zou Xuelu,JPX ; Hashimoto Kazuaki,JPX, Information recording substrate and information recording medium prepared from the substrate.
  22. Rinehart Dale W. (Natrona Heights PA), Lithium containing ion exchange strengthened glass.
  23. Tatsuaki Ishida JP; Ryuji Sugita JP; Kiyokazu Tohma JP; Keizou Miyata JP; Hiroshi Ryonai JP, 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.
  24. Hashimoto Kazuaki,JPX ; Zou Xuelu,JPX, Method of producing glass substrate for information recording medium.
  25. Araujo Roger J. (Horseheads NY), Strengthening glass by ion exchange.
  26. Yasuhiro Saito JP; Kazuishi Mitani JP; Yoshihiro Matsuno JP; Tatsuro Umeyama JP; Kazuaki Kanai JP, Substrate for information recording media.
  27. Zou Xuelu,JPX ; Toratani Hisayoshi,JPX, Substrate for information recording media and magnetic disc.
  28. Zou, Xuelu, Substrate for information recording medium and magnetic recording medium composed of crystallized glass.

이 특허를 인용한 특허 (4)

  1. Dejneka, Matthew John; Mauro, John Christopher; Smedskjaer, Morten Mattrup, Down-drawable chemically strengthened glass for information storage devices.
  2. Dejneka, Matthew John; Ellison, Adam James; Mauro, John Christopher, Zircon compatible, ion exchangeable glass with high damage resistance.
  3. Dejneka, Matthew John; Ellison, Adam James; Mauro, John Christopher, Zircon compatible, ion exchangeable glass with high damage resistance.
  4. Dejneka, Matthew John; Ellison, Adam James; Mauro, John Christopher, Zirconia compatible, ion exchangeable glass with high damage resistance.
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