| 摘要 |
PROBLEM TO BE SOLVED: To control an adhesive layer or a UV resin layer to have a prescribed thickness without complicated control by incorporating a fine particle base material having a particle diameter corresponding to the prescribed thickness in the adhesive layer or the UV resin layer. SOLUTION: Two layer of recording surfaces 3, 3 are formed on a disk 1 and each recording surface is read by laser beam. The adhesive layer 5 is required to have a prescribed thickness to stably read each recording surface. In such a case, the thickness of the adhesive is set to 55±15μm. As the adhesive layer, the UV resin is used and high precise 'Unibeads (R)' of the fine particle base material is previously incorporated thereinto. The high precise 'Unibeads (R)' is a glass fine particle having 40μm particle diameter, in almost spheroidal form and has remarkably excellent fluidity. |
