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Technology Stocks : Energy Conversion Devices -- Ignore unavailable to you. Want to Upgrade?

To: Frank Haims who wrote (7437)	12/5/2003 9:55:54 AM
From: mred5x5	Read Replies (2) \| Respond to of 8393

"Were there any signs that would indicate greater cycle life for OUM" Yes -- Some life cycle limitations were identified, e.g. layered phase segregation; necessity for at least some 'over-programming' to insure complete reset/set conditions over all cells in any array,with possible cause/effect relation between these two points. Degradations due to reactions of phase-change material with Ti heater electrodes were identified. Cycle life targets of 10^14th were mentioned - as feasible and necessary to get operating equivalence to SRAM and DRAM in most, if not all, applications. Write disturb issues were discussed by Lowrey -- expects this to remain a non-issue with scaling down in dimensions -- as the cell size scales down linearly with cell spacings -- thereby keeping 'disturb' margins constant. In large arrays (multi millions) the challenge to get each and every cell into its lowest energy state (crystalline phase) with a SET pulse is now accomplished by a variation in the programming pulse-shape (See patent application #20030218904). "Also can the other non licensed firms move ahead into production without our patent library." I don't think so -- All the papers dealt with the Ge-Sb-Te ternary system and ECD's patents should prevail IMO. Ed