Electrically erasable memory elements characterized by reduced current and improved thermal stability
US5534712A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 21, 1995 |
| Grant date | Jul 9, 1996 |
| Priority date | — |
| Expiry date | Aug 21, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C2213/72
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Disclosed herein is a solid state, directly overwritable, non-volatile, high density, low cost, low energy, high speed, readily manufacturable, single cell memory element having reduced switching current requirements and an increased thermal stability of data retention. The memory element includes a volume of memory material which is a transition metal modified chalcogen. The transition metal may be selected from the group consisting of Nb, Pd, Pt and mixtures or alloys thereof. The memory material may further include at least one transition metal selected from the group consisting of Fe, Cr, Ni and mixtures or alloys thereof. The memory element exhibits orders of magnitude higher switching speeds at remarkably reduced switching energy levels. The novel memory element of the instant invention is in turn characterized, inter alia, by at least two stable and non-volatile detectable configurations of local atomic and/or electronic order, which configurations can be selectively and repeatably accessed by electrical input signals of designated energy levels. The memory elements are further characterized by enhanced thermal stability of data retention, which stability is achieved by elem…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.