Optical recording medium with different wobble characteristics between the user data area and the lead-out area

Abstract

A method of recording on an optical recording medium having a user data area and a lead-out area, wherein the user data area and the lead-out area each has grooves and lands formed thereon. Wobbles are formed on at least one lateral surface of grooves of the user data area and the lead-out area, and configured such that wobble characteristics are made different between the user data area and the lead-out area. Different types of wobbles are formed on the grooves of either the user data area or the lead-out area, thereby preventing an optical pickup that performs recording/reproduction from deviating from the user data area. Also, in a multi-layer optical recording medium, a whole area of a recording layer is configured to have a same condition, thereby preventing deterioration in reproduction and/or recording due to a difference in light power transmittance of another recording layer.

1 . A method of recording on a multi-layer optical recording medium having a user data area on each recording layer and a groove formed on the user data area of one of the recording layers, wherein user data wobbles are formed on at least one lateral surface of the groove of the one recording layer, the method comprising: 
 recording data on the one recording layer of the optical recording medium,    wherein the recording of the data comprises staying in the user data area of the one recording layer according to lead out wobbles, which differ from the user data wobbles of the one recording layer and which are formed on an area beyond a predetermined radius of the one recording layer.    
     
     
         2 . The method of recording of  claim 1 , further comprising maintaining tracking while interlayer jumping between the recording layers from outermost circumferences of the recording layers according to the lead out wobbles.  
     
     
         3 . A method of recording on an optical recording medium having a user data area and a lead-out area, wherein the user data area and the lead-out area each has a groove and a land formed thereon, and user data wobbles are formed on at least on lateral surface of the groove of the user data area, the method comprising: 
 recording data on the optical recording medium,    wherein the recording of the data comprises staying in the user data area according to lead out wobbles, which differ from the user data wobbles of the user data area and which are formed on the lead-out area of the optical recording medium.    
     
     
         4 . A method of recording on an optical recording medium having a user data area and a lead-out area, wherein the user data area and the lead-out area each has a groove and a land formed thereon, the method comprising: 
 recording data on the optical recording medium,    wherein the recording of the data comprises staying in the user data area according to a synchronization pattern, which differs from a synchronization pattern of the user data area and which is formed on the lead-out area of the optical recording medium.    
     
     
         5 . A method of recording on an optical recording medium having a user data area, wherein the user data area has a groove and a land formed thereon, the method comprising: 
 forming lead out wobbles, which differ from user data wobbles formed on at least one lateral surface of the groove of the user data area, in an area beyond a predetermined radius of the optical recording medium.    
     
     
         6 . The method of  claim 5 , wherein the forming of the lead out wobbles comprises forming the lead out wobbles by modulating at least one feature of frequency, period, amplitude and phase of the wobbles of the user data area.  
     
     
         7 . The method of  claim 5 , wherein a synchronization pattern of a signal read from the groove of the user data area is different from a synchronization pattern of the lead-out area.  
     
     
         8 . The method of  claim 5 , further comprising forming predetermined recording patterns in the lead-out area to prevent an optical pickup from deviating from the user data area.  
     
     
         9 . The method of  claim 5 , wherein the optical recording medium is a multi-layer optical recording medium comprising a plurality of recording layers.