Stock material or miscellaneous articles – Circular sheet or circular blank
Patent
1998-09-16
2000-07-04
Evans, Elizabeth
Stock material or miscellaneous articles
Circular sheet or circular blank
428 644, 428 645, 428 647, 428 652, 428457, 428913, 43027012, 4304951, 430945, 369283, 369288, B32B 300
Patent
active
060835982
ABSTRACT:
In an optical disk obtained by pasting two substrates, air bubbles and the like are removed from an adhesive layer between the substrates pasted together, and the thickness irregularity of the adhesive layer is suppressed to an allowable value or less. A spacer having a predetermined thickness is concentrically placed on a substrate. An adhesive is applied onto a surface of the substrate on which the spacer is placed. Another substrate is placed on the surface of the substrate on which the adhesive is applied. The substrates are rotated about the spacer at a high speed. The excessive adhesive sandwiched between the substrates is expelled, together with air bubbles and the like, by using the centrifugal force produced by the rotation. With this process, an adhesive layer having a thickness determined by the thickness of the spacer is left between the two substrates.
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Nishizaka Kan
Ohkubo Yoshiyuki
Evans Elizabeth
Kabushiki Kaisha Toshiba
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