公开(公告)号：EP1197956A3

公开(公告)日：2007-04-11

申请号：EP01308616.0

申请日：2001-10-09

申请人： TDK Corporation

发明人： Kato, Tatsuya, c/o TDK Corporation ,  Utsunomiya, Hajime, c/o TDK Corporation ,  Inoue, Hiroyasu, c/o TDK Corporation ,  Shingai, Hiroshi, c/o TDK Corporation ,  Tanaka, Yoshitomo, c/o TDK Corporation

IPC分类号： G11B7/0045 ,  G11B7/006 ,  G11B7/26

CPC分类号： G11B7/24085 ,  G11B7/00454 ,  G11B7/006

摘要： Increase of jitter in a phase change optical recording medium is suppressed with no extreme decrease in the crystallization speed of the recording layer when the medium is overwritten at a high linear velocity. In addition, in a disk-shaped medium operated at a constant angular velocity, the overwriting is accomplished with the increase of jitter suppressed over the entire area of the medium. Provided is an optical recording method for recording a disk-shaped optical recording medium having a phase change recording layer which is rotated at a constant angular velocity, wherein amorphous recorded marks are formed in the recording layer. In this method, the minimum recorded mark is formed such that W L /M L incrementally or gradually decreases from the radially inner side to the radially outer side of the optical recording medium, when the minimum signal has a length of S L , and when the minimum recorded mark corresponding to said minimum signal has its maximum width of M W , E W is 0.1 M W ; the position on the leading edge side of the recorded mark at the width of E W is designated effective leading edge; and the position on the trailing edge side of the recorded mark at the width of E W is designated effective trailing edge; the distance between the effective leading edge and the effective trailing edge is designated effective length M L ; and the distance between the effective leading edge and the position at which the width starts to decrease on the trailing edge side is designated W L .

公开(公告)号：EP1431966A3

公开(公告)日：2007-03-21

申请号：EP03257991.4

申请日：2003-12-18

申请人： Ricoh Company, Ltd.

发明人： Yuzurihara, Hajime ,  Abe, Mikiko ,  Deguchi, Hiroshi ,  Hibino, Eiko ,  Miura, Hiroshi ,  Ito, Kazunori ,  Abe, Michiharu

IPC分类号： G11B7/006 ,  G11B7/0045

CPC分类号： G11B7/0062

摘要： An optical recording method of recording information to a phase change optical recording medium with alternate application of peak power and bias power in a pulse manner and with changing a pulse application interval continuously from an inner part through an outer part of the recording medium with an interval proportional to a window width Tw and a fixed interval, comprising the step of starting a top peak power application interval with a delay from a data input pulse signal starting time for a target mark length nTw, where n denotes an integer in a range between 3 and 14, with changing the delay in proportion to the window width Tw with changing a proportionality factor discretely with respect each linear velocity.

公开(公告)号：EP1752973A1

公开(公告)日：2007-02-14

申请号：EP06021878.1

申请日：2003-02-14

申请人： TDK Corporation

发明人： Miura, Hideaki ,  Kato, Tatsuya ,  Mizushima, Tetsuro

IPC分类号： G11B7/0045 ,  G11B7/125 ,  G11B7/006

CPC分类号： G11B7/0062 ,  G11B7/006 ,  G11B7/00718 ,  G11B2007/0013

摘要： An information recording method for recording information in an optical recording medium having at least stacked first and second information recording layers by projecting a laser beam whose power is modulated thereonto via a light incidence plane, and setting a pulse width of a multi-pulse of the laser beam when information is to be recorded in the first information recording layer to be shorter than that when information is to be recorded in the second information recording layer, thereby recording information in the optical recording medium.

摘要翻译： 上的信息记录方法，用于在光记录介质中记录信息计划通过投射的激光束的功率经由光入射调制在其上，并设置的一个多脉冲的脉冲宽度至少具有堆叠的第一和第二信息记录层 激光束当信息要被记录在第一信息记录层中，以比较短当信息要被记录在第二信息记录层中，从而记录在光记录介质的信息。

公开(公告)号：EP1652176A1

公开(公告)日：2006-05-03

申请号：EP04744602.6

申请日：2004-07-16

申请人： Koninklijke Philips Electronics N.V.

发明人： TIEKE, Benno ,  VAN DER VLEUTEN, Maarten

IPC分类号： G11B7/006

CPC分类号： G11B7/0062

摘要： The present invention relates to a method and a corresponding device for transforming a first set of write parameters (W) of a write strategy, in particular a 2T write strategy, for recording marks in an information layer (301) of a record carrier (30) by irradiating the information layer (301) with a pulsed radiation beam (32) at a first recording speed (R) into a second set of write parameters (W') of said write strategy for recording marks at a second recording speed (R'), T representing the length of one period of a reference clock. In order to achieve an at least acceptable recording performance at the second recording speed, it is proposed according to the present invention that the duration of the write pulses is kept substantially constant in time, and the duration of a complete sequence of write pulses for recording a mark is kept substantially constant as a fraction of the reference clock T.

公开(公告)号：EP1644923A1

公开(公告)日：2006-04-12

申请号：EP04744432.8

申请日：2004-06-30

申请人： Koninklijke Philips Electronics N.V.

发明人： MEINDERS, Erwin, R. ,  VLUTTERS, Erwin, R.

IPC分类号： G11B7/0055 ,  G11B7/006 ,  G11B7/005

CPC分类号： G11B7/005 ,  G11B7/00557 ,  G11B7/0062 ,  G11B2220/2591

摘要： The present invention relates to a method and a corresponding device for recording data in the form of marks and for erasing recorded marks in an information layer of a record carrier by irradiating the information layer by means of a pulsed radiation beam, a recorded mark being erased by a sequence of erase pulses (31, 32), said information layer having a phase reversibly changeable between a crystalline phase and an amorphous phase. In order to achieve a significant reduction in power consumption, which is at least important for portable optical drives such as an SFFO drive, it is proposed according to the present invention that at least one of the erase pulses in said sequence of erase pulses (31, 32) has an erase power level which is decreasing with time. The present invention also relates to a method and a device for reading information from a record carrier.

公开(公告)号：EP1642269A1

公开(公告)日：2006-04-05

申请号：EP04737118.2

申请日：2004-06-22

申请人： Koninklijke Philips Electronics, N.V.

发明人： MARTENS, Hubert ,  VAN DEN OETELAAR, Ronald ,  VLUTTERS, Ruud

IPC分类号： G11B7/006 ,  G11B7/26

CPC分类号： G11B7/126 ,  G11B7/00454 ,  G11B7/00557 ,  G11B7/00736 ,  G11B7/24082 ,  G11B7/268

摘要： A phase change medium, a device and a method for driving a phase change medium are proposed that allow writing at high speed and erasing at low speed. The proposed low-speed erasing option must be seen as a formatting option that can be applied to the whole medium (or to part of the medium) so as to put the medium (or part of the medium) back to a virgin state. With the invention, direct overwriting of data is not possible: the data have first to be erased at low speed before new data can be written on the medium at high speed. According to the invention, the medium is rotated at a linear velocity that depends on the selected operating mode, the linear velocity applied in the writing mode being much higher than said maximum crystalline velocity, and the linear velocity applied in said erasing mode being equal to or lower than said maximum crystalline velocity. Application: DVD+R high-speed.

公开(公告)号：EP1630803A2

公开(公告)日：2006-03-01

申请号：EP05025175.0

申请日：1997-10-02

申请人： MITSUBISHI CHEMICAL CORPORATION

发明人： Ohno, Takashi, c/o Mitsubishi Chemical Corp. ,  Horie, Michikazu, c/o Mitsubishi Chemical Corp.

IPC分类号： G11B7/24 ,  G11B7/00 ,  G11B7/006

CPC分类号： G11B7/243 ,  G11B7/0045 ,  G11B7/00454 ,  G11B7/0062 ,  G11B7/126 ,  G11B7/24067 ,  G11B7/2433 ,  G11B7/252 ,  G11B7/2534 ,  G11B7/2542 ,  G11B7/257 ,  G11B7/258 ,  G11B7/2585 ,  G11B7/259 ,  G11B7/2595 ,  G11B7/268 ,  G11B2007/24304 ,  G11B2007/2431 ,  G11B2007/24312 ,  G11B2007/24314 ,  G11B2007/24316 ,  Y10S430/146 ,  Y10T428/21

摘要： An optical information recording medium having a multilayer structure comprising at least a lower protective layer, a phase-change type optical recording layer, an upper protective layer and a reflective layer, on a substrate, wherein the phase-change type optical recording layer has a composition of Ge f (Sb d Te 1-d ) 1-f , where 0.60 ≤ d ≤ 0.85, and 0.01 ≤ f ≤ 0.20 and has a thickness of from 15 to 30 nm, the protective layer has a thickness of from 10 to 50 nm, and the reflective layer is made of a metal containing at least 90 atomic % of Au, Ag or Al and has a thickness of from 50 to 500 nm, wherein a crystallization accelerating layer which is per se crystalline during deposition, is formed between the phase-change type optical recording layer and the lower protective layer in a thickness of from 0.2 to 10 nm, and an initialization operation is carried out by irradiating an energy beam to the recording layer for crystallization.

摘要翻译： 一种光学信息记录介质，具有在基板上至少包含下保护层，相变型光记录层，上保护层和反射层的多层结构，其中相变型光记录层具有 Ge f（Sb d Te 1-d）1-f的组成，其中0.60‰¤‰‰0.85和0.01‰‰‰0.20，厚度为15至30 nm，保护层厚度 为10〜50nm，并且所述反射层由含有至少90原子％的Au，Ag或Al的金属制成，并且具有50〜500nm的厚度，其中结晶促进层本身为结晶促进层 在相变型光记录层和下保护层之间形成厚度为0.2〜10nm的沉积，通过向记录层照射结晶来进行初始化动作。

公开(公告)号：EP1484751A4

公开(公告)日：2005-11-16

申请号：EP03706940

申请日：2003-02-14

申请人： TDK CORP

发明人： MIURA HIDEAKI ,  KATO TATSUYA ,  MIZUSHIMA TETSURO

IPC分类号： G11B7/00 ,  G11B7/0045 ,  G11B7/006 ,  G11B7/007 ,  G11B7/125

CPC分类号： G11B7/0062 ,  G11B7/006 ,  G11B7/00718 ,  G11B2007/0013

摘要： A method for recording information on a rewritable optical recording medium having information recording layers by making a recording mark having a favorable shape. In the method, a laser beam the power of which is modulated is applied to the light incidence surface (13a) of an optical recording medium (10) having at least an LO layer (20) and an L1 layer (30) formed thereon in a multilayer structure so as to record information. The relation between the wavelength lambd of the laser beam and the numerical aperture NA of the objective for focusing the laser beam is lambd/NA

公开(公告)号：EP1359572A3

公开(公告)日：2005-05-11

申请号：EP03252684.0

申请日：2003-04-28

申请人： Pioneer Corporation

发明人： Sasaki, Yoshio, c/o Pioneer Corporation ,  Adachi, Masatoshi, c/o Pioneer Corporation ,  Tanaka, Hisao, c/o Pioneer Corporation ,  Nakagawa, Hidenori, c/o Pioneer Corporation ,  Uchino, Hiroyuki, c/o Pioneer Corporation

IPC分类号： G11B7/0045 ,  G11B7/125 ,  G11B7/006

CPC分类号： G11B7/00456 ,  G11B7/0062

摘要： The information recording and reproducing apparatus (1) drives the light source (11) based on the recording data to irradiate the laser pulses on the storage medium (D) and forms the recording marks. The level of the laser pulse is varied between the write power level (Pw) necessary to form the recording marks and the bias level (Pb) during the mark periods. Since the bias level (Pb) is set to be lower than the read power level (Pr) necessary to reproduce recording marks, the quantity of the laser light irradiated onto the storage medium (D) during the recording may be reduced, and the adverse effect due to the heat accumulation or the heat distribution can be diminished. As a result, the recording marks of appropriate shape can be formed on the storage medium (D), and the information recording accuracy can be improved.

公开(公告)号：EP1249834A3

公开(公告)日：2005-05-04

申请号：EP02252572.9

申请日：2002-04-10

申请人： Ricoh Company, Ltd.

发明人： Abe, Michiharu ,  Shinotsuka, Michiaki ,  Yokoi, Kenya

IPC分类号： G11B7/006 ,  G11B7/0045

CPC分类号： G11B7/00456 ,  G11B7/0062 ,  G11B7/126

摘要： An input bit sequence with predetermined bit periods T is converted into a corresponding light-emission waveform; and a beam with the thus-obtained light-emission waveform is applied onto a phase-change optical disk so as to record the input bit sequence thereon. The light-emission waveform comprises a heating pulse for heating the recording medium occurring for an interval tw and a cooling pulse for cooling the recording medium occurring for an interval tc, and the intervals tw and tc on the heating/cooling pulses satisfy the following requirement in case the heating/cooling pulses occur alternately with repetition: 1.5T ≤ tw + tc ≤ 3T.