发明名称 OPTICAL DISK
摘要 PURPOSE:To decrease the internal stress caused onto a circular base attended with the curing and shrinking of an adhesives by adhering two circular bases to a spacer while they are shifted in radial direction. CONSTITUTION:The two transparent circular bases 2, 5 made of a material such as polycarbonate are adhered and fixed via spacers 3, 4 and recording layers 1a, 1b are formed to the inner face of the bases 2,5. In adhering the bases 2, 5, an adhesives 10 of a prescribed quantity is coated to a position by a distance (l) in the radial disk direction of a spacer 4 and the adhesives 10 is applied to the spacer 3 similarly at a shifted position, and the base 2, 5 are adhered via the spacer. Thus, the deforming force attended with the curing and shrinking of the adhesives 10 is absorbed by the deformation of the spacers 3, 4 and the internal stress caused by the bases 2, 5 is suppressed to a small value. Thus, the increase in the double deffraction caused due to the adhesion distortion is suppressed.
申请公布号 JPS63138539(A) 申请公布日期 1988.06.10
申请号 JP19860285670 申请日期 1986.11.28
申请人 NEC HOME ELECTRONICS LTD 发明人 KATSUTA SHINICHI
分类号 G11B7/24 主分类号 G11B7/24
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