| 摘要 |
PURPOSE:To prevent the contamination at the end face of a disk by an adhesive agent coated to an annular shape and the degradation in function as a spacer by embedding a hollow pipe into at least one point of the adhesive agent so as to cross the ring. CONSTITUTION:The hollow pipe 5 is embedded into at least one point of the adhesive agent 3 coated to the annular shape so as to cross the ring and thereafter two substrates 1a, 1b are superposed at the time of producing the optical information recording disk medium having hollow structure by coating the adhesive agent 3 to at least one of the substrates 1a, 1b along the respective inside and outside peripheral edges thereof to the annular shape and superposing and sticking the two substrates. Since the air in the internal space is thereby released from the pipe to the outside, the increase of the air pressure is obviated and the annular shape of the adhesive agent is hardly disturbed. The contamination at the end of the optical information recording disk medium by the adhesive agent is thereby obviated and the degradation in the adhesive effect of the adhesive agent and the function as the spacer is prevented. |
