| 摘要 |
PROBLEM TO BE SOLVED: To use a stamper of long life for molding and mold by introducing a raw material gas composed of hydrocarbon gas, as a main component, ionizing the same, carrying out the deposit separation on the back of the stamper to form a diamond-shaped film to be coated thereon, supporting the stamper in a molding die cavity and injecting resin. SOLUTION: A diamond shaped film is formed on the back 8 of a stamper in an ordinary film manufacturing device. As the diamond-shaped film is formed on the back 8 of the stamper 1 of a molding die, the life of the stamper 1 can be prolonged to a large extent. Also as it is hard to form marks on the stamper 1, characteristics of a matrix surface of the stamper 1 are hard to be lowered, and the quality of a disk to be molded is good for a long time. Thus the stamper 1 of low wear resistance and low friction resistance is manufactured to achieve the realization of long life of the stamper 1, and a number of disks can be manufactured by one stamper 1 to achieve the reduction of the molding cost to a large extent. |
