| 摘要 |
PURPOSE:To obtain the titled medium which is strong to an abrupt environmental change by providing a hydrophilic resin layer into a hermetic space having air sandwich structure. CONSTITUTION:A recording layer 2 is provided on one substrate 1 and the hydrophilic resin layer 3 is provided on the other substrate 1. The substrates 1, 1 are concentrically disposed by using an inside peripheral spacer 4 and an outside peripheral spacer 5 with the recording layer 2 and the hydrophilic resin layer 3 faced on the inside and are hermetically closed by forming the space 6 between the opposed surfaces of the substrates 1, 1. A fitting hole 7 is provided to the central part of the substrates 1, 1. A metallic material such as Te, Bi or Se is used for the recording material and a PVA or polypeptide resin is used for the hydrophilic resin material. |
