New M-Disc Technology Promises Permanent Data Retention
2011.08.11.07:51
From a start-up company called Millenniata M-Discs ditch the traditional reflective layer found in standard physical media discs and instead etch the information directly into the body of the multi-layered disc itself, which is made of an undisclosed stone-like substance. Supposedly, it lasts forever, and the Department of Defense vouches for its resiliency. Millenniata’s CEO says that any DVD hardware manufacturer can make the jump to M-Disc by installing a firmware upgrade on their machines. The M-Disc’s staying power comes at the cost of burn speed, however; you can only write to them at a 4x rate. At that speed, it’s almost a good thing that M-Discs will only be able to match standard DVD capacities of 4.7GB when they hit the shelves in October for $3 a pop.
http://www.maximumpc.com/article/news/new_m-disc_technology_promises_permanent_data_retention
TDK’s All-But-Impervious Armor
By William Van Winkle, 2005.01.01
In the 1980s, CDs were heralded as a virtually indestructible advance over LPs. CDs are more resistant to dust and light scratches, but most of us still have a fair number of brutalized discs. One scratch can render a track or entire disc useless. The situation with DVDs and the coming wave of blue laser discs appeared no better—until now.
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TDK has devised a coating process that prevents scratching and repels ink and oils. The scratch resistance comes from an ultra-thin, spin-coated layer of 50-micrometer silica particles. Another layer of fluorine-doped resin goes on top and is cured with UV light. The fluorine resins don’t absorb moisture, so ink or oils simply form droplets on the disc surface that can be easily wiped away. TDK debuted its recordable Armor DVD media two years ago—already heralded as 100 times more scratch resistant than regular media—but recent advances with the second resin layer filed under a new patent have made surface droplet sizes so small they’re insignificantly small compared to the size of a laser striking the disc and thus pose no problem with deflecting the beam.
The new Armor process even works to repel dust. According to TDK, a standard DVD releases 50% of a static charge over 15 hours. New Armor Plated discs do the same thing in 50 minutes.
“There is an ongoing research and development effort to enhance both the performance and cost level of digital recording media at TDK,” notes Bruce Youmans, TDK vice president of marketing. “Beyond the current protective coating enabling scratch resistance, fingerprint repellence, and antistatic properties to ward off dust particles, TDK is working on anti-UV characteristics that will protect the recording layer from UV source damage. For instance, as 8cm disc-format video camcorders continue to grow in popularity, this technology will protect the disc under normal stress field conditions.”
TDK recently launched 8cm DVDs with the latest Armor technology and plans to bring the coating to its CD line. The coating can also be applied to screens such as those on wall-mounted plasmas.