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    • 3. 发明授权
    • Method for manufacturing read-only optical disc medium and read-only optical disc medium
    • 制造只读光盘介质和只读光盘介质的方法
    • US08634287B2
    • 2014-01-21
    • US12526555
    • 2008-12-08
    • Tetsuhiro SakamotoJun NakanoTakayuki AsahinaEtsuo ShibasakiHideo Kawachi
    • Tetsuhiro SakamotoJun NakanoTakayuki AsahinaEtsuo ShibasakiHideo Kawachi
    • G11B7/24
    • G11B7/00736G11B7/00451G11B7/24085G11B7/24094G11B7/263G11B7/268
    • An information signal area on an information signal recording surface is provided as pits on a mirror in accordance with modulated information data, and is covered with a metal alloy reflective film. Sections that do not include pits corresponding to the information data are provided in the information signal area, and portions of the metal alloy reflective film on the sections are formed as perforated marks corresponding to the information data. In this case, the reproduction signal amplification level of a prepit signal and the reproduction signal amplitude level of a perforated mark signal can be obtained as substantially equal values by adjusting the depth and width of pits and/or adjusting the width and length of perforated marks. Hence, waveform distortion due to a waveform equalization circuit and variations in binary signals due to displacement of the slice level are reduced so that signals can be stably and reliably detected with the same reading apparatus.
    • 信息信号记录面上的信息信号区域根据调制信息数据作为凹坑设置在反射镜上,并被金属合金反射膜覆盖。 不包括与信息数据对应的凹坑的部分设置在信息信号区域中,并且部分上的金属合金反射膜的部分形成为与信息数据相对应的穿孔标记。 在这种情况下,通过调整凹坑的深度和宽度和/或调整穿孔标记的宽度和长度,可以获得预凹坑信号的再现信号放大电平和穿孔标记信号的再现信号幅度电平基本上相等的值 。 因此,由于波形均衡电路引起的波形失真和由于限幅电平的位移引起的二进制信号的变化被减小,从而可以用相同的读取装置稳定可靠地检测信号。
    • 5. 发明申请
    • READ-ONLY OPTICAL DISC MEDIUM AND METHOD OF MANUFACTURING SAME
    • 只读光盘及其制造方法
    • US20090080312A1
    • 2009-03-26
    • US12159009
    • 2007-11-08
    • Tetsuhiro SakamotoJun NakanoAkiya SaitoToshihiko SennoYoshinobu UsuiMakoto Tsukahara
    • Tetsuhiro SakamotoJun NakanoAkiya SaitoToshihiko SennoYoshinobu UsuiMakoto Tsukahara
    • G11B7/00G11B7/24B05D3/12B32B37/00
    • G11B7/00736G11B7/00451G11B7/263G11B7/268
    • At the stage where disc substrates are to be manufactured in mass production by using a stamper, a section where pits/lands are not formed is formed in advance as an additional information recording section among recording tracks formed by a recording data sequence of pits/lands. A metal alloy reflection film is coated on the information recording surface including such an additional information recording section 10. Then, thereafter, additional information is recorded in the additional information recording section 10 by forming hole marks 6 by erasing or decreasing a partial area of the metal alloy reflection film. The additional information is recorded in a partial area of recording tracks in the information recording area (the area where information is recorded by a recording data sequence of pits/lands, the area including a content area and a management area such as a lead-in). The hole marks 6 are formed as marks from which logic values that are the same as those of pits are obtained at the time of reproduction.
    • 在通过使用压模来批量生产盘基片的阶段,预先形成没有形成凹坑/平台的部分作为附加信息记录部分,在由凹坑/平台的记录数据序列形成的记录道中 。 金属合金反射膜涂覆在包括这样的附加信息记录部分10的信息记录表面上。然后,通过擦除或减少附加信息记录部分10的部分区域来形成孔标记6,将附加信息记录在附加信息记录部分10中。 金属合金反射膜。 附加信息被记录在信息记录区域中的记录轨道的部分区域中(通过凹坑/区域的记录数据序列记录信息的区域,包括内容区域的区域和诸如引入区域的管理区域 )。 孔标记6形成为在再现时获得与凹坑的逻辑值相同的逻辑值的标记。