JP2000268410A5 - - Google Patents
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- Publication number
- JP2000268410A5 JP2000268410A5 JP1999068859A JP6885999A JP2000268410A5 JP 2000268410 A5 JP2000268410 A5 JP 2000268410A5 JP 1999068859 A JP1999068859 A JP 1999068859A JP 6885999 A JP6885999 A JP 6885999A JP 2000268410 A5 JP2000268410 A5 JP 2000268410A5
- Authority
- JP
- Japan
- Prior art keywords
- thickness
- disk substrate
- disk
- radius
- peripheral portion
- Prior art date
- 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.)
- Granted
Links
- 239000000758 substrate Substances 0.000 description 9
- 230000003287 optical Effects 0.000 description 5
- 230000002093 peripheral Effects 0.000 description 4
- 238000010030 laminating Methods 0.000 description 2
Description
ここで、光ディスクの厚さは、規格値として規定されている。例えばＤＶＤ−９という径が１２ｃｍの光ディスクは、スペーサ層がそれぞれ形成された２枚のディスク基板を相互に貼り合わせて作成されている。そして、この光ディスクの厚さの規格値は、屈折率が１．５６〜１．６５のとき、ディスク基板の厚さは０．５５ｍｍ以上、スペーサ層の厚さは０．０４ｍｍ〜０．０７ｍｍ、ディスク基板とスペーサ層の厚さは０．６４ｍｍ以下と規定されている。 Here, the thickness of the optical disc is defined as a standard value. For example, an optical disc having a diameter of 12 cm called DVD-9 is created by laminating two disk substrates on which spacer layers are formed. The standard value of the thickness of this optical disc is that when the refractive index is 1.56 to 1.65, the thickness of the disk substrate is 0.55 mm or more, and the thickness of the spacer layer is 0.04 mm to 0.07 mm. The thickness of the disk substrate and the spacer layer is specified to be 0.64 mm or less.
図１は、本発明のディスク基板の実施形態を示す側面図である。
このディスク基板１は、例えばＤＶＤ−９という径が１２ｃｍの高記録密度の光ディスクに使用される。この光ディスクは、一面にスペーサー層が形成された２枚のディスク基板１を貼り合わせることにより作成される。このディスク基板１は、内周部、即ち半径ｒ１（例えば半径２３ｍｍ）付近の厚さｔ１が、外周部、即ち半径ｒ２（例えば半径５０ｍｍ〜５５ｍｍ）付近の厚さｔ２より厚くなるように形成されている。そして、ディスク基板１の内周部から外周部にかけての厚さの変化は、ディスク基板１のスペーサー層形成面１ａにおいて直線状に減少している。
FIG. 1 is a side view showing an embodiment of the disk substrate of the present invention.
This disk substrate 1 is used, for example, for a high recording density optical disc having a diameter of 12 cm called DVD-9. This optical disk is created by laminating two disk substrates 1 having a spacer layer formed on one surface thereof. The disk substrate 1 is formed so that the inner peripheral portion, that is, the thickness t1 near the radius r1 (for example, a radius of 23 mm) is thicker than the outer peripheral portion, that is, the thickness t2 near the radius r2 (for example, a radius of 50 mm to 55 mm). ing. The change in thickness from the inner peripheral portion to the outer peripheral portion of the disk substrate 1 is linearly reduced on the spacer layer forming surface 1a of the disk substrate 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06885999A JP4079541B2 (en) | 1999-03-15 | 1999-03-15 | Disc board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06885999A JP4079541B2 (en) | 1999-03-15 | 1999-03-15 | Disc board |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2000268410A JP2000268410A (en) | 2000-09-29 |
| JP2000268410A5 true JP2000268410A5 (en) | 2006-01-26 |
| JP4079541B2 JP4079541B2 (en) | 2008-04-23 |
Family
ID=13385829
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP06885999A Expired - Fee Related JP4079541B2 (en) | 1999-03-15 | 1999-03-15 | Disc board |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4079541B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL1028737C2 (en) * | 2005-04-11 | 2006-10-12 | Axxicon Moulds Eindhoven Bv | Mold assembly and / or stamper. |
| KR100823262B1 (en) * | 2006-05-04 | 2008-04-17 | 삼성전자주식회사 | Optical recording media, method and apparatus for recording/reproducing for the same |
-
1999
- 1999-03-15 JP JP06885999A patent/JP4079541B2/en not_active Expired - Fee Related
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