JPS61121521U - - Google Patents

Info

Publication number

JPS61121521U

JPS61121521U JP1985001888U JP188885U JPS61121521U JP S61121521 U JPS61121521 U JP S61121521U JP 1985001888 U JP1985001888 U JP 1985001888U JP 188885 U JP188885 U JP 188885U JP S61121521 U JPS61121521 U JP S61121521U

Authority

JP

Japan

Prior art keywords

protection plate

disk

optical recording

groove

recording layer

Prior art date

1985-01-11

Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)

Pending

Links

• Espacenet
• Global Dossier
• Discuss

• 230000003287 optical effect Effects 0.000 claims description 6
• 239000000758 substrate Substances 0.000 claims description 6
• 239000011248 coating agent Substances 0.000 claims 1
• 238000000576 coating method Methods 0.000 claims 1
• 230000002093 peripheral effect Effects 0.000 claims 1
• 239000000049 pigment Substances 0.000 claims 1
• 230000001681 protective effect Effects 0.000 description 1