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zman_tekinsil
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re: Numonyx set to discuss potential PCM "showstopper"
zman_tekinsil   4/16/2010 10:51:06 PM
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The current is not the 200MA/cm2 in the 16nm feature. It is the 600uA. I assume they meaured roughly 600uA and devide by 16nm x 16nm area to get to 200MA/cm2. Reverse thinking: if you bundle in parallel a bunch of those 16nm features to form an array that has an area of 1cm2, than you will need 200 MA to program them all together. So in other words, the concern in the article is that 600uA is large for 16nm node. Therefore the viability of PCM for memory is in question!

jnhong
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re: Numonyx set to discuss potential PCM "showstopper"
jnhong   4/16/2010 9:01:11 PM
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OK now I get it. Thanks for the clarification. It's still hard to see where all the current will come through. There's only so much metal in the stack and you still have contacts and vias which not support such current densities. It's not just at the transistor/channel level where the current density issues will occur.

zman_tekinsil
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re: Numonyx set to discuss potential PCM "showstopper"
zman_tekinsil   4/15/2010 3:36:27 AM
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Ooops typo: meant ...one would get a current of 600mA... Sorry!

zman_tekinsil
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re: Numonyx set to discuss potential PCM "showstopper"
zman_tekinsil   4/15/2010 3:29:24 AM
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A/cm2 unit represents current density which is standard in semiconductor devices. For instance, in the 200 MA/cm2 and 16nm node/size one would get a current of 600um for that given node (assuming a square 16x16 nm2), which cannot be easy to visualyze if compared to the "current" of another size.

Peter Clarke
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re: Numonyx set to discuss potential PCM "showstopper"
Peter Clarke   4/14/2010 7:59:15 PM
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Avagadro
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re: Numonyx set to discuss potential PCM "showstopper"
Avagadro   4/14/2010 5:01:29 PM
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What's a few orders of magnitude among friends????

dirk.bruere
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re: Numonyx set to discuss potential PCM "showstopper"
dirk.bruere   4/13/2010 6:30:43 PM
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Looks like memristor tech will win out

jnhong
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re: Numonyx set to discuss potential PCM "showstopper"
jnhong   4/13/2010 4:22:42 PM
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20 MA is 20 Mega Amperes. This kind of mistake in an electrical engineering publication is simply NOT ACCEPTABLE.



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As data rates begin to move beyond 25 Gbps channels, new problems arise. Getting to 50 Gbps channels might not be possible with the traditional NRZ (2-level) signaling. PAM4 lets data rates double with only a small increase in channel bandwidth by sending two bits per symbol. But, it brings new measurement and analysis problems. Signal integrity sage Ransom Stephens will explain how PAM4 differs from NRZ and what to expect in design, measurement, and signal analysis.

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