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Webfeet > Industry News Briefs Summary > Categories
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4/11/2008
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An IBM research team has developed a new generation of memory that combines the high performance and reliability of solid state "flash" memory, stored in microchips, with the high capacity of the PC's hard disk drive, which is cheap but contains moving parts and is slow. IBM's recently disclosed "Magnetic Race-Track Memory is a technology for practical applications that's five to ten years away. The mechanism for this technology is the movement of domain walls. Memory bits are stored perpendicularly on a silicon substrate. The orientation of the bit stream will determine if it is a 1 or a 0. Current pulses are used to move the domain walls. The direction of the current pulse controls the direction of the domain wall movement. | 10/18/2007
WD announced it achieved an areal density of 520Gb/in2 on a prototype hard disk drive. To date this is the highest demonstrated areal density for the HDD industry. The announcement was made at the Perpendicular Magnetic Recording Conference in Tokyo after an earlier demonstration at the laboratory in Fremont, California. This announcement comes on the heels of Hitachi's read head technology announcement advancing areal densities ranging from 500Gb/in2 to 1Tb/in2. WD's PMR demonstration utilizes tunneling magneto-resistive (TuMR) head technology. This areal density promises capacities up to 3TB in a 3.5 inch HDD.
© 2008 Copyright Web-Feet Research, Inc.
Hitachi has announced the development of the world's smallest head technology for hard disk drives that will quadruple current 1 terabyte (TB) 3.5 inch hard disk drive capacities to 4 TB. To achieve this result, researchers at Hitachi have reduced recording head technology of today by more than a factor of two, resulting in smaller heads in the 30-50nm range. Areal densities are expected to range from 500Gb/in2 to 1Tb/in2 with this new technology. Highest areal densities today have reached 200Gb/in2. Current Perpendicular-to –the plane giant magnetoresistive (CPP-GMR) technology is expected to launch in products in 2009 reaching its full capability in 2011.
9/7/2007
Toshiba announced a prototype hard disk drive with Discrete Track Recording (DTR) technology. DTR enables higher recording densities with perpendicular magnetic recording. Toshiba's prototype drive is able to achieve 120GB on a single 1.8 inch platter. This translates to 333 Gb/in2. Toshiba's current 1.8 inch products are achieving 80GB per platter at 228Gb/in2. According to Toshiba, DTR technology increases recording density by forming a "groove" between the tracks on the PMR medium. The groove reduces signal interference between adjacent data tracks, allowing the pitch of the tracks to be shortened. The improved signal quality also contributes to raising the recording density by 50 percent. DTR technology utilizes an electron beam lithography system developed in research related to the "Nanometer-Scale Optical High Density Disk Storage System", a national project supported by Japan's New Energy and Industrial Technology Development Organization (NEDO). Toshiba plans to start mass production of HDDs integrating DTR technology in 2009.
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