![]() ![]() The polycarbonate may also flex or bend if stored for a long period of time in a nonvertical position. Physical mishandling of the disc is usually the cause of polycarbonate layer damage. Because degradation of the data layer will render the disc useless well before the polycarbonate begins to deteriorate, the relative degradation rate for the polycarbonate layer is not used for life expectancy considerations. In each of the three basic disc types, environmental forces will degrade the data layer much faster than the polycarbonate substrate layer (the clear plastic that makes up most of the disc). Deterioration of this material is the primary cause for disc degradation and, ultimately, “end of life” for the disc, assuming proper physical handling.Įnvironmental factors can affect the rate of disc degradation. The life expectancy (LE) of optical discs depends on many factors, some controllable by the user, others not.įactors that affect disc life expectancy include the following:Īs noted previously, the three basic types of CD and DVD discs-ROM, R, and RW and RAM-each use a different data layer material (molded aluminum, organic dye, or phase-changing film, respectively).
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |