A high-density information storage apparatus using electron emission and methods of writing, reading and erasing information using the same are provided. The high-density information storage apparatus includes a lower electrode, a photoconductive layer and a recording medium sequentially provided on...http://www.google.de/patents/US20030053399?utm_source=gb-gplus-sharePatent US20030053399 - High-density information storage apparatus using electron emission and methods of writing, reading and erasing information using the same