Look out silicon and magnetic storage, here comes glass. Micron has announced production of the first commercial cellphone phase-change memory (PCM) modules, a type of flash RAM that works by changing a crystal solid to an amorphous state. The 1Gb chips will share a circuit board with 512Mb of standard volatile memory, just enough to go in feature phones for now -- but the company claims it will eventually offer larger modules for smartphone and tablet storage as well. PCM could scale to much faster speeds than conventional N
