Apparatus for storing and retrieving information using an electron beam
US4817053A · kind A · utility
16Cited by
6References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 9, 1987 |
| Grant date | Mar 28, 1989 |
| Priority date | — |
| Expiry date | Jul 9, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B9/10
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An electron beam memory system in which a phase transition type recording film is used as an information recording medium, and for recording information, a focused electron beam is selectively projected on desired positions of the recording film so as to locally heat the recording film and cause phase transition, while for retrieving information, an electron beam having energy at a degree not causing the phase transition is projected so as to utilize the fact that reflection or diffraction of the primary electron beam projected at the retrieval differs between the recorded regions and unrecorded regions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.