| 摘要 |
An optical data storage medium, such as a data card with a strip of optical data storage material, having peelable transparent protective layers adhered above the storage material. When a protective layer becomes too scratched to read or write through, it may be removed by peeling. More than one layer may be adhered successively above one another, and removed one by one as they become scratched. The peelable protective layers are preferably adhesive tapes made of Aclar, Mylar, polyester, or other hard-to-tear polymers with pressure sensitive adhesive. One or more of the layers, and an underlayer between substrate or card base and the storage material may be a water barrier material such as a polytrichlorofluoroethylene.
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