| 摘要 |
The present invention provides an exposure apparatus of an optical disc master plate for exposing a photoresist master plate and writing-in a DVD-R format, and a method of exposing an optical disc master plate. The exposure apparatus of the optical disc master plate can cause both the wobble signal and the land pre-pit signal to precisely synchronize with each other and to output the synchronized signals by use of a formatter. The formatter can facilitate the design of a separation element for electrically separating an analog circuit and a digital circuit from each other and a circumferential circuit thereof. The formatter of the optical disc exposing apparatus operates on the basis of the predetermined basic clock signal Fclk. The formatter is provided with a wobble signal generating circuit which generates a wobble signal and a land pre-pit signal generating circuit which operates on the basis of the same basic clock signal Fclk and generates a land pre-pit signal. The wobble signal generating circuit is provided with a frequency dividing circuit for dividing the frequency of the basic clock signal Fclk and operates on the basis of the frequency-divided clock signal.
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