Programming a normally single phase chalcogenide material...

Static information storage and retrieval – Systems using particular element – Amorphous

Reexamination Certificate

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C365S174000

Reexamination Certificate

active

07414883

ABSTRACT:
A memory may be implemented with a stable chalcogenide glass which is defined as a generally amorphous chalcogenide material that does not change to a generally crystalline phase when exposed to 200° C. for 30 minutes or less. Different states may be programmed by changing the threshold voltage of the material. The threshold voltage may be changed with pulses of different amplitude and/or different pulse fall times. Reading may be done using a reference level between the threshold voltages of the two different states. A separate access device is generally not needed.

REFERENCES:
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patent: 2006/0092810 (2006-05-01), Sakamoto
patent: 2007/0249086 (2007-10-01), Philipp et al.
Troles et al., “Characterization of New Sulfur and Selenium-Based Glasses Containing Lead Iodide”, Journal of Non-Crystalline Solids, North-Holland Physics Publishing, Amsterdam, NL, vol. 352, No. 3, Mar. 1, 2006, pp. 248-254.
Vazques et al., “Evaluation of the Glass Forming Ability of Some Alloys in the Sb-As-Se System by Differential Scanning Calorimetry”, Journal of Alloys and Compounds, Elsevier Sequoia, Lausanne, CH, vol. 354, No. 1-2, May. 12, 2003, pp. 153-158.
International Search Report dated Mar. 29, 2007 from the PCT counterpart application.

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