公开(公告)号：AU2009304890B2

公开(公告)日：2015-05-07

申请号：AU2009304890

申请日：2009-10-13

Applicant: PANASONIC CORP ,  SONY CORP ,  TDK CORP

Inventor： KOMMA YOSHIAKI ,  ANZAI JOJI ,  INOUE HIROYASU ,  KIKUKAWA TAKASHI ,  MISHIMA KOJI ,  NAKANO JUN ,  MIYAWAKI MANAMI ,  TAKAGAWA SHIGEKI

IPC: G11B7/24

Abstract: Provided are an optical recording medium wherein qualities of servo signals and reproducing signals are improved, and a method for manufacturing the optical recording medium. An optical recording medium (40) satisfies the following inequalities; t3-t4≥1 μm, t4-t2≥1 μm, t2≥10 μm, and t1-(t2+t3+t4)≥1 μm, where, (t1) is a thickness between a surface (40z) and a first information recording surface (40a) of an optical recording medium (40), (t2) is a thickness between the first information recording surface (40a) and a second information recording surface (40b), (t3) is a thickness between the second information recording surface (40b) and a third information recording surface (40c), and (t4) is a thickness between the third information recording surface (40c) and a fourth information recording surface (40d).

公开(公告)号：AU2009304890A1

公开(公告)日：2010-04-22

申请号：AU2009304890

申请日：2009-10-13

Applicant: SONY CORP ,  PANASONIC CORP ,  TDK CORP

Inventor： KOMMA YOSHIAKI ,  ANZAI JOJI ,  INOUE HIROYASU ,  KIKUKAWA TAKASHI ,  MISHIMA KOJI ,  NAKANO JUN ,  MIYAWAKI MANAMI ,  TAKAGAWA SHIGEKI

IPC: G11B7/24

Abstract: An object of the invention is to provide an optical recording medium and a method for producing an optical recording medium that enable to improve the quality of a servo signal and a reproduction signal. The optical recording medium (40) satisfies: t3-t4 ‰§ 1 µm, t4-t2 ‰§ 1 µm, t2 ‰§ 10 µm, and t1-(t2+t3+t4)‰§ 1 µm, where t1 is a thickness between a surface (40z) of the optical recording medium (40), and the first information recording surface (40a), t2 is a thickness between the first optical recording surface (40a) and the second information recording surface (40b), t3 is a thickness between the second optical recording surface (40b) and the third information recording surface (40c), and t4 is a thickness between the third optical recording surface (40c) and the fourth information recording surface (40d).

公开(公告)号：BRPI0607958A2

公开(公告)日：2010-11-03

申请号：BRPI0607958

申请日：2006-02-07

Applicant: SONY CORP

Inventor： FUJITA GORO ,  SHIMOUMA TAKASHI ,  NAKANO JUN ,  TAKAGAWA SHIGEKI ,  SAITO KIMIHIRO

IPC: G11B7/004 ,  G11B20/10

Abstract: In an optical disk (100), a substrate (101) has main data recorded in the form of a combination of pits and lands on one side thereof, and at least a reflective layer (102) and cover layer (103) are stacked on the substrate to cover the pits and lands on the substrate (101). To the optical disk (100), sub data is recorded in the form of marks formed by irradiating writing-power laser light to the reflective layer (102). The marks are formed so that reading signal level will be raised where the marks are formed while it will be lowered where the marks are formed in a counterfeit disk produced based on an authenticated disk, namely, the reading signal level where the marks are formed is different in polarity between in the authenticated and counterfeit disks. Further, in a player for the optical disk (100), discrimination is made between the authenticated and counterfeit disks by detecting the sub data recorded in the optical disk and judging whether the value of the detected sub data has been read at a correct polarity.

公开(公告)号：AU2006211660A1

公开(公告)日：2006-08-10

申请号：AU2006211660

申请日：2006-02-07

Applicant: SONY CORP

Inventor： SHIMOUMA TAKASHI ,  NAKANO JUN ,  SAITO KIMIHIRO ,  FUJITA GORO ,  TAKAGAWA SHIGEKI

IPC: G11B7/004 ,  G11B20/10

Abstract: In an optical disk (100), a substrate (101) has main data recorded in the form of a combination of pits and lands on one side thereof, and at least a reflective layer (102) and cover layer (103) are stacked on the substrate to cover the pits and lands on the substrate (101). To the optical disk (100), sub data is recorded in the form of marks formed by irradiating writing-power laser light to the reflective layer (102). The marks are formed so that reading signal level will be raised where the marks are formed while it will be lowered where the marks are formed in a counterfeit disk produced based on an authenticated disk, namely, the reading signal level where the marks are formed is different in polarity between in the authenticated and counterfeit disks. Further, in a player for the optical disk (100), discrimination is made between the authenticated and counterfeit disks by detecting the sub data recorded in the optical disk and judging whether the value of the detected sub data has been read at a correct polarity.

公开(公告)号：EP1847989A4

公开(公告)日：2009-01-07

申请号：EP06713212

申请日：2006-02-07

Applicant: SONY CORP

Inventor： FUJITA GORO ,  SHIMOUMA TAKASHI ,  NAKANO JUN ,  TAKAGAWA SHIGEKI ,  SAITO KIMIHIRO

IPC: G11B7/004 ,  G11B20/10

CPC classification number: G11B20/10 ,  G11B7/24085 ,  G11B20/00086 ,  G11B20/00094 ,  G11B20/00173 ,  G11B20/00586 ,  G11B20/00594 ,  G11B2020/1453

Abstract: Main data is recorded by a combination of pits and lands on one side of a substrate (101) of an optical disc (100). A reflection film (102) and a cover layer (103) are layered to cover the surface where the pits and lands are formed on the substrate. Sub data is recorded by a mark formed by irradiation of a laser beam to the reflection film by recording power. In a forged disc produced according to a valid optical disc in which a reproduction signal level at the portion having a mark increases, a mark recording is performed so that the reproduction signal level at the portion having the mark is lowered and the polarity of the reproduction signal at the portion having the mark is different between the valid disc and the forged disc. Furthermore, sub data recorded on the optical disc is detected by the reproduction device and it is judged whether the detected sub data has a value reproduced with a valid polarity, thereby judging whether the disc is a valid one or a forged one.

公开(公告)号：EP2482280A4

公开(公告)日：2015-01-07

申请号：EP10818771

申请日：2010-09-17

Applicant: TDK CORP ,  PANASONIC CORP ,  SONY CORP

Inventor： INOUE HIROYASU ,  KIKUKAWA TAKASHI ,  MISHIMA KOJI ,  KOMMA YOSHIAKI ,  ANZAI JOJI ,  NAKANO JUN ,  MIYAWAKI MANAMI ,  TAKAGAWA SHIGEKI

IPC: G11B7/24038

CPC classification number: G11B7/24038 ,  Y10T428/21

公开(公告)号：EP2337027A4

公开(公告)日：2012-05-09

申请号：EP09820423

申请日：2009-10-13

Applicant: PANASONIC CORP ,  TDK CORP ,  SONY CORP

Inventor： KOMMA YOSHIAKI ,  ANZAI JOJI ,  INOUE HIROYASU ,  KIKUKAWA TAKASHI ,  MISHIMA KOJI ,  NAKANO JUN ,  MIYAWAKI MANAMI ,  TAKAGAWA SHIGEKI

IPC: G11B7/24

CPC classification number: G11B7/24038 ,  G11B7/1376 ,  G11B7/13925 ,  Y10T428/21

公开(公告)号：AU2010299204A1

公开(公告)日：2012-05-17

申请号：AU2010299204

申请日：2010-09-17

Applicant: PANASONIC CORP ,  SONY CORP ,  TDK CORP

Inventor： INOUE HIROYASU ,  KIKUKAWA TAKASHI ,  MISHIMA KOJI ,  KOMMA YOSHIAKI ,  ANZAI JOJI ,  NAKANO JUN ,  MIYAWAKI MANAMI ,  TAKAGAWA SHIGEKI

IPC: G11B7/24

Abstract: Disclosed is an optical recording medium, including three or more information recording layers, characterized in that the refractive indices of a plurality of intermediate layers each disposed between an adjacent pair of the information recording layers are larger than that of a cover layer disposed between an incident surface and the information recording layer that is the closest to the incident surface. With this, crosstalk caused by light beams reflected from multiple surfaces is reduced and thereby the signal quality is improved in the optical recording medium including the three or more information recording layers.

公开(公告)号：PL1847989T3

公开(公告)日：2011-08-31

申请号：PL06713212

申请日：2006-02-07

Applicant: SONY CORP

Inventor： FUJITA GORO ,  SHIMOUMA TAKASHI ,  NAKANO JUN ,  TAKAGAWA SHIGEKI ,  SAITO KIMIHIRO

IPC: G11B7/004 ,  G11B20/10

公开(公告)号：DE602006021141D1

公开(公告)日：2011-05-19

申请号：DE602006021141

申请日：2006-02-07

Applicant: SONY CORP

Inventor： FUJITA GORO ,  SHIMOUMA TAKASHI ,  NAKANO JUN ,  TAKAGAWA SHIGEKI ,  SAITO KIMIHIRO

IPC: G11B7/004 ,  G11B20/10