Claims
- 1. A disc-shaped recording medium comprising a transparent substrate, a first dielectric film formed on the transparent substrate, a recording film formed on the first dielectric film, a second dielectric film formed over the recording film, a reflective film formed over the second dielectric film, a protective film formed over the reflective film, wherein the protective film has a film thickness of not less than 15 μm and within a range in which a recording layer is formed, the film thickness has a variation between the inner and outer rim portions of the disc of less than 2 μm.
Priority Claims (1)
Number |
Date |
Country |
Kind |
9-058034 |
Mar 1997 |
JP |
|
CROSS-REFERENCE TO RELATED APPLICATIONS
This is a division of U.S. application Ser. No. 09/038,944, Mar. 12, 1998 now U.S. Pat. No. 5,980,985.
US Referenced Citations (6)