WO/2005/119661 is referenced by 1 patents.

The invention relates to a record carrier comprising a train of marks and lands (14, 15, 23), which has a plurality of marks comprising shortest marks (1) and other marks (2) and a plurality of lands between said marks in a direction of said train of marks and lands comprising shortest lands (28) and other lands (27), said train of marks and lands (14, 15, 23) having information read by applying a light beam, and a land area not being part of said train of marks and lands. To provide a record carrier with an improved modulation of all marks without sacrificing tangential density and to further provide a record carrier with a reduced or substantially no asymmetry, it is proposed that said shortest marks (1) and leading and trailing edges (3) of said other marks (2) have a width larger than that of a central mark section (4) between said leading and trailing edges (3) of said other marks (2) and that said lands between said marks (19) in said direction of said train of marks and lands (15) have a reflectivity lower than that of said land area. The invention further relates to a method and a device for manufacturing such a record carrier.

Title
Record carrier with improved modulation and asymmetry
Application Number
PCT/IB2005/051755
Publication Number
2005/119661
Application Date
May 30, 2005
Publication Date
December 15, 2005
Inventor
Neijzen Jacobus H M
Meinders Erwin R
Agent
UITTENBOGAARD Frank
Assignee
Neijzen Jacobus H M
Meinders Erwin R
Koninklijke Philips Electronics
IPC
G11B 07/26
G11B 07/0045
View Original Source