23-04-2012, 03:58 PM
FLASH MEMORY
MODEL -FARE_SEMINAR_REPORT.doc (Size: 931.5 KB / Downloads: 98)
INTRODUCTION
The explosion of flash memory technology has dramatically increased storage capacity and decreased the cost of non-volatile semiconductor memory. The technology has fueled the proliferation of USB flash drives and is now poised to replace magnetic hard disks in some applications. A solid state drive (SSD) is a non-volatile memory system that emulates a magnetic hard disk drive (HDD). SSDs do not contain any moving parts, however, and depend on flash memory chips to store data. With proper design, an SSD is able to provide high data transfer rates, low access time, improved tolerance to shock and vibration, and reduced power consumption. For some applications, the improved performance and durability outweigh the higher cost of an SSD relative to an HDD.
FLOATING GATE FLASH MEMORY CELLS
SSDs mainly depend on flash memory chips to store data. The name "flash" was suggested because the process of erasing the memory contents reminded him of the flash of a camera. Flash memory chips store data in a large array of floating gate metal–oxide–semiconductor (MOS) transistors. Silicon wafers are manufactured with microscopic transistor dimension, now approaching 40 nanometers. In this flash memory thin insulating glass layers are necessary for proper operation of the memory cells. These layers are subjected to stressful temperatures and voltages, and their insulating properties deteriorate over time. Quite simply, flash memory can wear out.
SINGLE AND MULTIPLE LEVEL CELLS
The control gate voltage necessary to form the N-channel is controlled by the charge on the floating gate. The required voltage is called the gate threshold voltage and is labeled Vth. With SLC flash memory, there is only one programmed state in addition to the erased state. The total of two states allows a single data bit to be stored in the memory cell.
DISK DRIVE DEFINITIONS
• Hard disk drives (HDD) :
HDDs utilize ultra sophisticated magnetic recording and playback technologies. They are used as the primary data storage component technologies. component in notebooks, desktops, servers, and dedicated storage systems.
• Hybrid hard drives (HHD) :
HHDs are a new type of large buffer computer hard drive. They are different from standard hard drives in that they employ a large buffer (up up to 1GB) of nonvolatile flash memory used to cache data during normal use. By using this large buffer, the platters of the hard drive are at rest almost at all times, instead of constantly spinning as is the case in HDDs. This feature offers numerous benefits, such as decreased power consumption, improved reliability, and a faster boot process.
APPLICATIONS
INTEL THIRD-GENERATION SSD 320SERIES
Intel announced today its highly anticipated third-generation solid-state drive (SSD) the Intel Solid-State Drive 320 Series. Based on its industry-leading 25-nanometer (nm) NAND flash memory, the Intel SSD 320 replaces and builds on its high-performing Intel X25-M SATA SSD. Delivering more performance and uniquely architected reliability features, the new Intel SSD 320 offers new higher capacity models, while taking advantage of cost benefits from its 25nm process with an up to 30 percent price reduction over its current generation.
CONCLUSION
As the Solid State Drives is a new innovative technology which will provide high data transference, high data security & enhanced reliability. And the most speculious highlighting feature is, the power consumption which can be contributed by the Intel third generation Solid State Drives with the help of the Intel 3-D Tri-Gate processors. Hence in the future the presence of cach memory can be avoided by using these Intel Third Generation Solid State Drives & also their main moto of the Intel organization is to cut energy use by 50% by the implementation of these Third Generation Solid State Drives.
MODEL -FARE_SEMINAR_REPORT.doc (Size: 931.5 KB / Downloads: 98)
INTRODUCTION
The explosion of flash memory technology has dramatically increased storage capacity and decreased the cost of non-volatile semiconductor memory. The technology has fueled the proliferation of USB flash drives and is now poised to replace magnetic hard disks in some applications. A solid state drive (SSD) is a non-volatile memory system that emulates a magnetic hard disk drive (HDD). SSDs do not contain any moving parts, however, and depend on flash memory chips to store data. With proper design, an SSD is able to provide high data transfer rates, low access time, improved tolerance to shock and vibration, and reduced power consumption. For some applications, the improved performance and durability outweigh the higher cost of an SSD relative to an HDD.
FLOATING GATE FLASH MEMORY CELLS
SSDs mainly depend on flash memory chips to store data. The name "flash" was suggested because the process of erasing the memory contents reminded him of the flash of a camera. Flash memory chips store data in a large array of floating gate metal–oxide–semiconductor (MOS) transistors. Silicon wafers are manufactured with microscopic transistor dimension, now approaching 40 nanometers. In this flash memory thin insulating glass layers are necessary for proper operation of the memory cells. These layers are subjected to stressful temperatures and voltages, and their insulating properties deteriorate over time. Quite simply, flash memory can wear out.
SINGLE AND MULTIPLE LEVEL CELLS
The control gate voltage necessary to form the N-channel is controlled by the charge on the floating gate. The required voltage is called the gate threshold voltage and is labeled Vth. With SLC flash memory, there is only one programmed state in addition to the erased state. The total of two states allows a single data bit to be stored in the memory cell.
DISK DRIVE DEFINITIONS
• Hard disk drives (HDD) :
HDDs utilize ultra sophisticated magnetic recording and playback technologies. They are used as the primary data storage component technologies. component in notebooks, desktops, servers, and dedicated storage systems.
• Hybrid hard drives (HHD) :
HHDs are a new type of large buffer computer hard drive. They are different from standard hard drives in that they employ a large buffer (up up to 1GB) of nonvolatile flash memory used to cache data during normal use. By using this large buffer, the platters of the hard drive are at rest almost at all times, instead of constantly spinning as is the case in HDDs. This feature offers numerous benefits, such as decreased power consumption, improved reliability, and a faster boot process.
APPLICATIONS
INTEL THIRD-GENERATION SSD 320SERIES
Intel announced today its highly anticipated third-generation solid-state drive (SSD) the Intel Solid-State Drive 320 Series. Based on its industry-leading 25-nanometer (nm) NAND flash memory, the Intel SSD 320 replaces and builds on its high-performing Intel X25-M SATA SSD. Delivering more performance and uniquely architected reliability features, the new Intel SSD 320 offers new higher capacity models, while taking advantage of cost benefits from its 25nm process with an up to 30 percent price reduction over its current generation.
CONCLUSION
As the Solid State Drives is a new innovative technology which will provide high data transference, high data security & enhanced reliability. And the most speculious highlighting feature is, the power consumption which can be contributed by the Intel third generation Solid State Drives with the help of the Intel 3-D Tri-Gate processors. Hence in the future the presence of cach memory can be avoided by using these Intel Third Generation Solid State Drives & also their main moto of the Intel organization is to cut energy use by 50% by the implementation of these Third Generation Solid State Drives.