Developed a technique for recording can hold more than 300 million years.

24, Kyoto University research team and Hitachi has announced the development of the technology to record data at a density comparable to CD in quartz glass with high durability. Recording said and can hold more than 300 million years, is expected to be a technology that can be stored for a long period of cultural heritage archives video and high historical value.

Optical disc, such as DVD and resin sandwiched CD, the metal is hot and humid weak, I can not keep a record only about 100 years in favorable conditions. The team focused on quartz glass which is excellent in heat resistance and water resistance there. We have developed a technique to record "0" or "1" in the laser read by an optical microscope.
According to Hitachi, the recording can be at a density equivalent to 1.1 times the CD to prototype two centimeters square (2 mm thick). In addition, I also pass heating test that corresponds to the retention period of more than a few hundred million years "for two hours at 1,000 degrees." There is also a possibility that the human race does not exist considering the span of 100 million years. Who, I wonder I look at the data.



京都大と日立製作所の研究チームは２４日、耐久性の高い石英ガラスにＣＤ並みの密度でデータを記録できる技術を開発し発表した。３億年以上も記録が保持できるといい、歴史的価値が高い文化遺産の映像や公文書を長期間保存できる技術として期待される。
　ＣＤやＤＶＤなど、金属を樹脂に挟んだ光ディスクは高温多湿に弱く、好条件でも１００年ほどしか記録を保持できない。そこでチームは、耐熱性や耐水性に優れた石英ガラスに着目。レーザーで「１」か「０」を記録し、光学顕微鏡で読み出す技術を開発した。
　日立製作所によると、２センチ角（厚さ２ミリ）の試作品にＣＤの１．１倍に当たる密度で記録ができた。さらに、数億年以上の保存期間に相当する「１千度で２時間」という加熱試験にも合格した。１億年というスパンを考えると人類は存在していない可能性もありますね。誰が、そのデータを見るんでしょうかね。