Phase Change Memory might be on the market next year

Subject: General Tech | November 30, 2012 - 01:38 PM |
Tagged: nand, EMC, phase change memory

SSDs are not that old but already there is a challenge that must be overcome if it is to remain a viable storage medium.  As Allyn has discussed many times in articles and on the podcast, as NAND process shrinks continue, the number of write cycles before failure drops which lowers the life expectancy of the drive even while it allows for high capacity chips and lower power consumption.  Zahid Hussain is EMC's flash product division general manager and he is confident that his company will be able to do what Hynix, Samsung and others have so far been unable to do; work with Micron to replace the NAND chips with Phase Change Memory based chips.  This type of chip is non-volatile and could also find its way into DIMMs as well.  Read more at The Register.

ElReg_pcm_schematic.jpg

"It is anticipated that, as NAND process geometries shrink beyond 15nm or so, the working life will fall off drastically, speed will slacken and the error checking and correction logic will become much more complicated. At that point, roughly, it is hoped, a post-NAND technology will be productised and deliver chips that are denser than flash, faster than flash, approaching DRAM speed, byte-addressable instead of block-addressable, and with a longer working life. That seems like a real big ask."

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Source: The Register

The possibilty of rising DRAM prices got you down? Try PRAM instead!

Subject: General Tech | July 18, 2012 - 02:39 PM |
Tagged: phase, phase change memory, micron, 45nm

Phase Change Memory is not new, Allyn listened to Intel talk about a breakthrough in this technology almost three years ago, but it is not common on the market.  It offers two major benefits over the current RAM on the market, the first being its lack of volatility as the crystals it forms will remain even after power is cut off, the second is more dear to computer enthusiasts as it should be faster than DRAM.  It may seem odd that a technology which requires the formation of crystals would be faster than the electronic flipping of bits but Micron claims that the trickle of voltage supplied creates seed crystals which speed the formation process during write cycles. The good news is that we should see real world testing soon as The Inquirer has heard that Micron has a good supply of PRAM to sell which means benchmarks are not far behind.

Silver_Cross_Balmoral_Pram.jpg

"MEMORY MAKER Micron has announced high volume availability of its 45nm phase change memory (PCM) chips.

Micron has been pushing the development of PCM chips with Intel for a number of years and is finally at a stage where it can offer chips to its customers. The firm announced that its 45nm PCM chips are available in a 1Gb PCM plus a 512Mb LPDDR2 package for mobile devices."

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Source: The Inquirer