Method for producing optical information recording medium

Abstract

A method for producing an optical information recording medium includes the steps of: coating a solution for forming a dye recording layer onto a surface of a rotating disc-shaped resin substrate; and discharging a cleaning solution from a nozzle onto a peripheral edge to remove the dye recording layer from the peripheral edge, wherein discharge of the cleaning solution is initiated 1.0 to 300 seconds after completion of the coating, and the nozzle is disposed on a plane that extends in a normal line direction of the substrate and includes a straight line representing a discharge direction of the cleaning solution, so that an angle defined by the discharge direction and the normal line is 0 to 60°.

What is claimed is:  
     
         1 . A method for producing an optical information recording medium, comprising at least the steps of: 
 coating a solution for forming a dye recording layer onto a surface of a rotating disc-shaped resin substrate; and    discharging a cleaning solution from a nozzle onto a peripheral edge to remove the dye recording layer from the peripheral edge,    wherein 
 discharge of the cleaning solution is initiated 1.0 to 300 seconds after completion of the coating, and  
 the nozzle is disposed on a plane that extends in a normal line direction of the substrate and includes a straight line representing a discharge direction of the cleaning solution, so that an angle defined by the discharge direction and the normal line is 0 to 60°.  
   
     
     
         2 . The method of  claim 1 , wherein, in removing the dye recording layer, when the substrate is viewed from above, a virtual line that extends from a discharge mouth of the nozzle in the discharge direction is located on a rotation direction side of a straight line connecting a center of the substrate and the discharge mouth of the nozzle, with an angle defined between the straight line and the virtual line being 0 to 60°.  
     
     
         3 . The method of  claim 1 , wherein the angle defined by the discharge direction and the normal line is 10 to 45°.  
     
     
         4 . The method of  claim 1 , wherein the distance from a discharge mouth of the nozzle to the substrate is 0.3 to 5.0 mm.  
     
     
         5 . The method of  claim 1 , wherein discharge time of the cleaning solution is 0.1 to 1.5 seconds.  
     
     
         6 . The method of  claim 1 , wherein the amount of the cleaning solution discharged is 0.2 to 3.0 ml.  
     
     
         7 . The method of  claim 1 , wherein discharge pressure of the cleaning solution is 0.3 to 3.0 kg/cm 2 .  
     
     
         8 . The method of  claim 1 , wherein the cleaning solution is discharged by two nozzles that are respectively disposed at opposing positions above and below the substrate.  
     
     
         9 . The method of  claim 1 , wherein discharge of the cleaning solution is initiated within 3 to 100 seconds after completion of the coating.  
     
     
         10 . The method of  claim 2 , wherein the angle defined by the straight line and the virtual line is 10 to 45°.  
     
     
         11 . A method for producing an optical information recording medium, comprising at least the steps of: 
 coating a solution for forming a dye recording layer onto a surface of a rotating disc-shaped resin substrate;    coating a reflective layer on the formed dye recording layer; and    discharging a cleaning solution from a nozzle onto a peripheral edge to remove the dye recording layer from the peripheral edge,    wherein 
 discharge of the cleaning solution is started 1.0 to 300 seconds after completion of the coating of the reflective layer, and  
 the nozzle is disposed on a plane that extends in a normal line direction of the substrate and includes a straight line representing a discharge direction of the cleaning solution, so that an angle defined by the discharge direction and the normal line is 0 to 60°.  
   
     
     
         12 . The method of  claim 11 , wherein, in removing the dye recording layer, when the substrate is viewed from above, a virtual line that extends from a discharge mouth of the nozzle in the discharge direction is located on a rotation direction side of a straight line connecting a center of the substrate and the discharge mouth of the nozzle, with an angle defined by the straight line and the virtual line being 0 to 60°.  
     
     
         13 . The method of  claim 11 , wherein the angle defined by the discharge direction and the normal line is 10 to 45°.  
     
     
         14 . The method of  claim 11 , wherein the distance from a discharge mouth of the nozzle to the substrate is 0.3 to 5.0 mm.  
     
     
         15 . The method of  claim 11 , wherein discharge time of the cleaning solution is 0.1 to 1.5 seconds.  
     
     
         16 . The method of  claim 11 , wherein the amount of the cleaning solution discharged is 0.2 to 3.0 ml.  
     
     
         17 . The method of  claim 11 , wherein discharge pressure of the cleaning solution is 0.3 to 3.0 kg/cm 2 .  
     
     
         18 . The method of  claim 11 , wherein the cleaning solution is discharged by two nozzles that are respectively disposed at opposing positions above and below the substrate.  
     
     
         19 . The method of  claim 11 , wherein discharge of the cleaning solution is initiated within 3 to 100 seconds after completion of the coating of the reflective layer.  
     
     
         20 . The method of  claim 12 , wherein the angle defined by the straight line and the virtual line is 10 to 45°.