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resistion
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re: Do annular electrodes present a scalable PCM solution? - Part 1
resistion   5/8/2013 11:59:09 AM
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A problem with the heater is it is also resistive and takes up voltage. It makes more sense for the pcm to be annular than the heater.

Ron Neale
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re: Do annular electrodes present a scalable PCM solution? - Part 1
Ron Neale   5/8/2013 3:47:41 PM
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Resistion: Even if you create a PCM structure where the active material is in the form of an annulus, at sub-20nm dimensions I think the device will still have to rely on thermal cross coupling within the device structure to keep the reset current density at a level that will avoid the consequences of element separation and electro-migration. This will also mean that in a close packed matrix of those devices the device- to-device separation will be approximately the same as the the thermal coupling distant and you will suffer the consequences of thermal cross talk. In one of my earlier PCM papers in EETimes I looked briefly at a structure similar to the one you are suggesting. I characterized it as a Wrap Around Link (WAL)PCM structure and attempted to relate its likely performance to that of flat link PCM structures. If I remember it was described in a Numonyx patent. I am not aware that anybody is working on constructing memory matrix using that structure. I suppose it is just possible that it could form part of the IBM-SKH program.

Phase change memory
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re: Do annular electrodes present a scalable PCM solution? - Part 1
Phase change memory   5/9/2013 3:07:17 AM
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Hi,Ron Neale, would you please send me your paper entitled "Nonvolatile and reprogrammable, the read-mostly memory is here" to xlzhou@mail.sim.ac.cn.

resistion
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re: Do annular electrodes present a scalable PCM solution? - Part 1
resistion   5/9/2013 2:54:36 PM
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yes, the annular pcm is generally too tall when fabricated as a spacer.

Ron Neale
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re: Do annular electrodes present a scalable PCM solution? - Part 1
Ron Neale   5/9/2013 1:27:11 PM
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Phase Change Memory- Paper is on its way to you.



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