| 摘要 |
PROBLEM TO BE SOLVED: To provide a reproducing method of stamper which does not contaminate the surface of stamper for optical disc and realizes shortening of the working time without any environmental pollution. SOLUTION: In a method of enabling recycle use of a stamper for optical disc by adhering directly adhesive film to the surface where projections and recesses are formed for pit or groove and by polishing the rear surface of the stamper which can no longer been used because the rear surface has been deteriorated at the time of manufacturing the optical disc substrate with the projection molding, projection and compression molding or compression molding method, the adhesive film is formed of a base material film and an adhesive agent layer formed at the single surface thereof, adhesive agent layer includes a cross-linking agent of 0.1 to 30 pts.wt. having two or more cross-linking functional group in one molecule for the adhesive based on polymer of 100 pts.wt. having the functional group which can reacts with the cross-linking agent, adhesive force for SUS304-BA plate is 10 to 180g/25mm, average thickness of adhesive film is 20 to 300μm and fluctuation in thickness is within±5μm of the average thickness.
|
