US 6,982,016 B2
Optical information recording medium and its manufacturing method and apparatus
Eiji Ohno, Osaka (Japan); Hidemi Isomura, Osaka (Japan); Hideo Matsumoto, Osaka (Japan); Kazuhiro Hayashi, Osaka (Japan); Kazuya Hisada, Osaka (Japan); and Kazuo Inoue, Osaka (Japan)
Assigned to Matsushita Electric Industrial Co., Ltd., Osaka (Japan)
Filed on Jul. 25, 2003, as Appl. No. 10/626,570.
Application 10/626570 is a division of application No. 10/446052, filed on May 28, 2003.
Application 10/446052 is a division of application No. 09/547879, filed on Apr. 12, 2000, granted, now 6,613,170.
Claims priority of application No. 2000-16733 (JP), filed on Jan. 26, 2000.
Prior Publication US 2004/0129363 A1, Jul. 08, 2004
Int. Cl. B23B 31/28 (2006.01); G11B 7/26 (2006.01)
U.S. Cl. 156—64 14 Claims
OG exemplary drawing
 
1. A method of manufacturing an optical information recording medium, in which a first substrate having a first central bore and a second substrate having a second central bore are bonded to each other through radiation cure resin, the method comprising:
coating the radiation cure resin on the first substrate;
bringing the first and second substrates into close contact with each other through the radiation cure resin so as to form the first and second substrates integrally;
detecting that the radiation cure resin has been diffused towards the first and second central bores; and
irradiating, after said detecting, radiation to a whole of at least one opposite outer face of the integral first and second substrates so as to cure the radiation cure resin wholly.