Study of Flash Memory its Implementation Application and limitation

Flash memory is used at high speed as storage of personal information utilities, ubiquitous computing environments, mobile phones, electronic goods, etc. This is because flash memory has the characteristics of low electronic power, non-volatile storage, high performance, physical stability, portability, & so on. To improve the overall performance & service life of the flash memory, a new type of file management algorithm for flash memory has been designed. A new linear ordering function is added to the traditional file management system. Its function is to balance the used frequency of every port in the flash memory. The new file should be stored in the space whose writing times are smaller, thus improving the overall efficiency, extending the service life of flash memory. The capability of the management system designed is better than the traditional one, especially in the case of being operated more times. Phase_ change nonvolatile semiconductor memory technology is based on an electrically initiated, reversible rapid amorphous-to-crystalline phase-change process in multicomponent chalcagenide alloy materials similar to those used in rewriteable optical disks. Flash memory controller is interfaced with flash memory. It handles all signals required by the flash memory. With the required signals different types of commands are also sent through flash memory controller to the flash memory. Flash memory- based solid- state disks are fast becoming the dominant, form of end- user storage devices, partty even replacing the traditional hard- disks.