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.
Claims17
A lubricant composition containing one of kinds of phosphate esters and having extreme pressure environmental resistance.
An article coated with a lubricant composition containing one of kinds of phosphate esters and having extreme pressure environmental resistance.
A molding stamper for an optical disc substrate having a lubricant film formed on a rear surface, the lubricant film containing one of kinds of phosphate esters, the rear surface contacting a mirror surface of a mold.
A molding apparatus for an optical disc substrate, comprising:
- a mold having a mirror surface on which a stamper is mounted;
- and
- a lubricant film formed on the mirror surface, the lubricant film containing one of kinds of phosphate esters.
A method of molding an optical disc substrate, comprising the steps of:
- forming a lubricant film on a stamper contact portion of a mold and/or a mold contact portion of the stamper, the lubricant film containing one of kinds of phosphate esters;
- mounting the stamper on the mold;
- and
- injecting a material into the mold on which the stamper has been mounted at the mounting step and molding a disc substrate.
A method of forming a lubricant film, comprising the steps of:
- forming a lubricant film containing one of kinds of phosphate esters on a substrate;
- and
- wiping the lubricant film formed on the substrate at the forming step with solvent that does not dissolve the phosphate ester.
Dependencies are inferred from the claim text.