Successful read/write of digital data in fused silica glass with a recording density equivalent to Blu-ray Disc TM

Tokyo, October 20, 2014 -- Hitachi, Ltd. (TSE: 6501, “Hitachi”) today announced that, in collaboration with Professor MIURA Kiyotaka of the School of Engineering, Kyoto University, it has successfully achieved read/write of digital data in 100 layers of fused silica glass, a recording density comparable to Blu-ray DiscTM. One hundred multi-layer data recording was verified by the application of newly developed noise reduction technology to overcome interference from data recorded on other layers while trying to access data written in deeper layers within the fused silica glass.