Patent ID: 7851018

Claim:
A method of manufacturing an optical information recording medium having a substrate which includes a center hole, at least one signal recording layer, and a light-transmitting layer formed from a radiation curing resin formed on the substrate, the method comprising: forming a liquid state foundation by coating a radiation curing resin while rotating the substrate; coating additional radiation curing resin on the liquid state foundation while rotating the substrate; curing at least the additional radiation curing resin after said coating, wherein a maximum rotation speed of the substrate in said forming is greater than a maximum rotation speed in said coating, placing a cap at the center hole during said forming and said coating, the cap having a cap portion covering the center hole and a shaft extending vertically upward from the center of the cap portion, and pointing a nozzle at the center hole inclining against the vertical downward direction in the range between 5 degrees and 45 degrees during said coating such that the additional radiation curing resin is dropped onto the cap portion of the cap without contacting the shaft of the cap, so that the at least one of the radiation curing resin and the additional radiation curing resin does not adhere to the shaft of the cap, wherein the radiation curing resin is dropped at a first position and the additional radiation curing resin is dropped at a second position, the first and second positions being different from each other.