Title :
Near-field recording with 266 nm laser for disc mastering process
Author :
Imanishi, Shingo ; Takeda, Minoru ; Yamamoto, Masanobu ; Mukai, Nobuhiko ; Takagi, Katsuji ; Kono, Toshiyuki
Author_Institution :
Nano-lithography Sect., Sony Corp., Tokyo, Japan
Abstract :
We developed a near-field recording process with a 266 nm blue-violet laser and an objective lens of 1.35 NA. A two-stage servo with air suspension and PZT control sufficiently constrained the gap fluctuation between the supersphere solid immersion lens (SIL) and the glassmaster. As a result, the expected small size of the pit pattern was obtained. We expect that this breakthrough will be refined much more and improve the density of optical recording.
Keywords :
laser beam applications; optical disc storage; 20 GB; 25 GB; 266 nm; PZT control; RAM disk; ROM disc; air suspension; blue-violet laser diodes; near-field disc mastering process; near-field recording process; optical recording density improvement; random access memory disk; supersphere solid immersion lens; two-stage servo; Actuators; Disk recording; Electrooptic modulators; Fluctuations; Laser beams; Lenses; Optical refraction; Optical sensors; Optical surface waves; Optical variables control;
Conference_Titel :
Optical Memory and Optical Data Storage Topical Meeting, 2002. International Symposium on
Print_ISBN :
0-7803-7379-0
DOI :
10.1109/OMODS.2002.1028646
