Back to results
US 8,029,262 B2Granted
Lubricant composition and article, disk molding stamper, disk molding apparatus, disk forming method, method of forming lubrication coating
AssigneeSony Corporation
InventorsTakeshi Gouko, Kenji Echizen, Mikio Sato, Akio Koshita
Life of this patent
Estimating the term…
Abstract
A boundary lubricant film 1 is formed on a stamper 22 contact portion of a stationary mirror 21 and/or a stationary mirror 21 contact portion of the stamper 22. The boundary lubricant film 1 contains one of kinds of phosphate esters. A material is injected into a cavity 14. As a result, a disc substrate for an optical disc is molded.
Claims3
A molding stamper for an optical disc substrate comprising:
- a stationary mirror;
- a lubricant film having a thickness between 10 nm and 50 nm, formed on a mirror surface of the stationary mirror,
- wherein,
- the lubricant film contains a phosphate ester which is diluted to a concentration of between approximately 0.1 wt % to 10 wt % using an organic solvent, and
- the lubricant film is chemically absorbed into the rear surface of the stationary mirror.
2 more elements
Dependencies are inferred from the claim text.