Specifications

The Patent Office Journal 17/12/2010
4478
(12) PATENT APPLICATION PUBLICATION (21) Application No.709/DEL/2002 A
(19) INDIA
(22) Date of filing of Application :02/07/2002 (43) Publication Date : 17/12/2010
(54) Title of the invention : HIGH DENSITY DISC
(51) International classification :G11B 7/00
(31) Priority Document No
:2001-
40052
(32) Priority Date :05/07/2001
(33) Name of priority country
:Republic
of Korea
(86) International Application No
Filing Date
:NA
:NA
(87) International Publication No :NA
(61) Patent of Addition to Application Number
Filing Date
:NA
:NA
(62) Divisional to Application Number
Filing Date
:NA
:NA
(71)Name of Applicant :
1)SAMSUNG ELECTRONIC CO. LTD.
Address of Applicant :416 MAETAN_DONG, PALDAL GU,
SUWON-CITY, KYUNGKI-DO, REPUBLIC OF KOREA
(72)Name of Inventor :
1)YONG-HOON LEE
2)IN-SIK PARK
3)CHONG-SAM CHUNG
4)DU-SEOP YOON
5)KYUNG-GEUN LEE
6)HEUI-JONG KANG
7)HAN-KOOK CHOI
(57) Abstract :
A high density disc having a data area which is set such that compatibility is secured in the same drive while maintaining a superior
recording/reproducing feature, is disclosed. The high density disc has a center hole, a clamping area, a data area where user data is
recorded, a lead-in area located at the inner side of the data area, and a lead-out area located at the outer side of the data area. In the
high density disc in which the diameter of the center hole is 10 mm or more, the inner diameter of the clamping area is
characteristically within a range of 20-26 mm Also, the inner diameter of the data area is characteristically within a range of 35-40
mm. Therefore, while a conventional disc drive is still used, the size of the high density disc decreases and a recording capacity can be
increased.
No. of Pages : 19 No. of Claims : 31