OPTICAL DATA RECORDING MEDIUM AND MANUFACTURING APPARATUS AND METHOD THEREOF

摘要

An apparatus for producing an optical data recording medium comprising a turn table (11; 37) adapted to support a substrate (1; 31; 51) of the recording medium and a nozzle (10; 34) for dropping coating liquid onto the substrate. The coating liquid dropped on the substrate (1; 31; 51) is spread over the substrate by a rotational force of the turn table (11; 37) to form a coating layer (3; 21). The apparatus is provided with a gas flow suppressing type housing (15; 35) which is partitioned off from the atmosphere so as to suppress the convection current (G) flowing, due to the rotation of the turn table (11; 37), toward a central portion of the substrate (1; 31; 51) and further toward the outer circumferential portion thereof along a top surface of the substrate (1; 31; 51) and to suppress the evaporation of a solvent of the coating liquid into the atmosphere. The nozzle (10; 34) is arranged above the inner circumferential portion of the substrate (1) with its end portion being directed to the outer circumferential portion of the substrate (1; 31; 51), so that the end portion is inclined so as to form an angle less than 90 degrees relative to the substrate (1; 31; 51) as viewed from a side of the substrate. The coating liquid application is carried out in a hermetically sealed atmosphere within a sealing chamber (15; 35).