METHOD FOR PRODUCING OPTICAL INFORMATION RECORDING MEDIUM AND OPTICAL INFORMATION RECORDING MEDIUM

摘要

When a protrusion (protector) is formed of a liquid material such as a radiation curing resin on the signal surface side of a disc, two substantially concentric circular recesses (grooves) are provided previously in a substrate and the liquid material is dripped onto a region between the recesses and cured there thus forming a protrusion (protector) having desired height and width on the region.