| 摘要 |
A direct read-after write optical recording disk has a pair of transparent, disk-shaped members, each being formed with integral inner and outer ring-shaped bosses on one of its sides. A thin recording layer of light-sensitive material is coated onto each disk- shaped member in a shallow annular recess, formed between the two ring-shaped bosses. The two members are disposed in a coaxial relationship, with their respective bosses in abutment with each other, whereby the two recording layers are located within a sealed, annular chamber.
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