| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a master disk exposure apparatus and master disk exposure method for manufacturing an optical information recording medium with high recording density at a low cost by shortening an exposure time per a sheet of master disk for information recording medium. <P>SOLUTION: The master disk exposure apparatus corrects fogging by using a plurality of semiconductor laser light sources of ≤390 nm in wavelength. An exposure waveform can be modulated in a ≤1 ns rise time, so that exposure to a bit pattern can be performed at a ≥30 Mbps bit rate. Consequently, master disk exposure with recording density of ≥15 Mbit/mm<SP>2</SP>is enabled. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
