| 摘要 |
PURPOSE:To obtain an information recording medium having excellent characteristics without causing distortion of disk substrates by providing such a linking member that is fixed to either of hole parts in a spacer or a reinforcing member and brought into contact with the other hole part so as to slide freely. CONSTITUTION:The medium consists of two disk substrates 11, a ring spacer 13 having several hole parts 14 in its inside wall, reinforcing member 15 having several hole parts 16 on the outside wall, and a linking member 17 which is fixed to either of hole parts of the ring-type spacer or of the reinforcing member 15 and is brought into contact with the other hole part so as to slide freely. When the disk substrates 11 and reinforcing member 16 cause dimensional change according to external conditions, the linking member 17 slides in the hole part 16 to which the member 17 is brought into contact. By this method, dimensional change is absorbed by the linking member 17 to prevent bad influence on the disk substrates 11. Thereby, distortion or deformation of the disk substrates 11 can be prevented and the obtd. medium has excellent characteristics. |
