Title:
光記録媒体原盤の製造方法、光記録媒体スタンパの製造方法、及び光記録媒体の製造方法
Document Type and Number:
Japanese Patent JP4647241
Kind Code:
B2
Abstract:
By using an existing, relatively inexpensive manufacturing device, micropatterns (e.g. guiding grooves, prepits) having such track pitch and pit pitch that are smaller than the diameter of a light spot are formed more finely. There are provided at least two layers, i.e. (i) a resin substrate and (ii) a depressed part inducing layer made of dielectric material or metal oxide. A light beam is radiated and focused onto the depressed part inducing layer so as to form pit parts and/or guiding grooves on irradiated parts of the resin substrate. The depressed part inducing layer is then removed, so as to expose the pit parts and/or guiding grooves.
Inventors:
Maki Yamamoto
Nobuyuki Takamori
Hideharu Tajima
Go Mori
Rishin Saegusa
Nobuyuki Takamori
Hideharu Tajima
Go Mori
Rishin Saegusa
Application Number:
JP2004149653A
Publication Date:
March 09, 2011
Filing Date:
May 19, 2004
Export Citation:
Assignee:
Sharp Corporation
International Classes:
G11B7/26; G03F7/00; G03F7/11
Domestic Patent References:
| JP57127938A | ||||
| JP57208646A | ||||
| JP5339396A | ||||
| JP10319608A | ||||
| JP1296442A | ||||
| JP5388530A | ||||
| JP59119549A |
Attorney, Agent or Firm:
Kenzo Hara International Patent Office