Initializing phase change memories

Active solid-state devices (e.g. – transistors – solid-state diode – Bulk effect device – Bulk effect switching in amorphous material

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C438S095000, C257SE27004, C365S163000

Reexamination Certificate

active

07323707

ABSTRACT:
A thin film phase change memory may be provided with a layer which changes between amorphous and crystalline states. The threshold voltage of that layer may be increased in a variety of fashions. As a result of the threshold increase, it is possible to transition cells, initially fabricated in the set or low resistance state, into the reset or high resistance state. In one advantageous embodiment, after such initialization and programming, the threshold voltage increase is eliminated so that the cells operate thereafter without the added threshold voltage.

REFERENCES:
patent: 3573757 (1971-04-01), Adams
patent: 4845533 (1989-07-01), Pryor et al.
patent: 5406509 (1995-04-01), Ovshinsky et al.
patent: 5534711 (1996-07-01), Ovshinsky et al.
patent: 5534712 (1996-07-01), Ovshinsky et al.
patent: 6795338 (2004-09-01), Parkinson et al.
patent: 6859390 (2005-02-01), Pashmakov
patent: 2004/0114413 (2004-06-01), Parkinson et al.
patent: 2004/0257848 (2004-12-01), Chen et al.
patent: 2004/0257872 (2004-12-01), Chen et al.
patent: 2005/0041467 (2005-02-01), Chen
Y. Chen et al.,An Access-Transistor-Free(0T/1R)Non-Volatile Resistance Random Access Memory(RRAM)Using a Novel Threshold Switching, Self-Rectifying Chalcogenide Device, IEDM 03-905, IEEE 2003, pp. 37.4.1-37.4.4.
Bernacki, “Total Dose Radiation Response and High Temperature Imprint Characteristics of Chalcogenide Based RAM Resistor Elements”, IEEE Transaction on Nuclear Science, vol. 47, No. 6, pp. 2528-2532, Dec. 2000.
Chen et al., “An Access-Transistor-Free (0T/1R) Non-Volatile Resistance Random Access Memory (RRAM) Using a Novel Threshold Switching, Self-Rectifying Chalcogenide Device”, Macronix International Co., 2003.
Van Landingham, “Circuit Applications of Ovonic Switching Device”, IEEE Transactions on Electron Devices, vol. ED-20, No. 2, pp. 178-187, Feb. 1973.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Initializing phase change memories does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Initializing phase change memories, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Initializing phase change memories will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2770399

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.