| 摘要 |
PURPOSE:To form a good-quality recording layer which has excellent heat resistance and is free from cracks, etc., by determining the coefft. of linear expansion of a UV curing resin layer at the value between the coefft. of linear expansion of a base and the coefft. of linear expansion of a recording medium layer or the same value as the value of either thereof. CONSTITUTION:The coeffts. of linear expansion of the base, UV curing resin layer (2P) layer and recording layer of the information recording medium constituted by laminating the UV curing resin layer, 2P layer and recording layer on the base which is a base body are defined respectively as alphaS, alphaP, alphaM (/ deg.C) and the 2P layer of alphaS>alphaP>alphaM, or alphaP=alphaS, or alphaP=alphaM is used. The stresses between the layers at the time of heating and cooling are decreased in this way and the excellent heat resistance is imparted to the substrate, the good- quality recording layer is thus formed. |
