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US 6,154,439 AGranted
Optical recording medium and manufacturing method thereof
AssigneeSony Corporation
InventorsShin Masuhara, Masayoshi Kanno, Akitoshi Suzuki
Life of this patent
Estimating the term…
Abstract
An optical recording medium according to the present invention includes a data recording area forming a double spiral structured track having spiral recording tracks each formed of a groove and a land adjacent to the groove, and a reproduction only area forming a single spiral structured track consisting of a pit row.
Claims10
An optical recording medium comprising;
- a data recording area forming a double spiral structured track having spiral recording tracks each formed of a groove and a land adjacent to said groove;
- and
- a reproduction only area forming a single spiral structured track consisting of a pit row.
An optical recording medium comprising;
- a data recording area forming a double spiral structured track having two spiral recordable tracks by alternately arranging a groove and a land;
- and
- a reproduction only area forming a single spiral structured track consisting of a pit row.
Dependencies are inferred from the claim text.