Patent Number: 8,879,371

Title: Recording medium

Abstract: A recording medium is provided with: a guide layer on which a guide track or tracks are formed; and a plurality of recording layers, wherein a same mark group is formed in a same rotational phase position of each of a plurality of guide tracks which are included in a beam spot of guide laser light, the mark group including a pair of record marks which are shifted by a predetermined distance toward a right side and a left side, respectively, from a track center.

Inventors: Yoshida; Masayoshi (Kanagawa, JP), Shiroto; Takuya (Kanagawa, JP), Kobayashi; Hideki (Kanagawa, JP), Ogasawara; Masakazu (Kanagawa, JP), Tagiri; Takao (Kanagawa, JP), Suzuki; Makoto (Tokyo, JP)

Assignee: Pioneer Corporation

International Classification: G11B 7/004 (20060101)

Expiration Date: 2019-11-04 0:00:00