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Samsung Is the First to Develop 50nm DRAM Chip DDR2 efficiency rises 55%	By Alexandru Sima, Hardware Editor 19th of October 2006, 12:50 GMT Adjust text size:


Samsung Electronics has announced that it has developed the industry's first 50nm DDR2 DRAM chip, which will increase production efficiency from the 60nm level by 55%, according to Digitimes. The new 1Gbit DRAM incorporates advanced technologies, such as three-dimensional (3D) transistor design and multi-layered dielectric technology, which greatly enhance performance and data storage capabilities, showed Samsung. "With the 50nm DRAM development, we're continuing our technology leadership, paving the way for our customers to reap not only greater cost efficiencies but also to make superior products," said Nam Yong Cho, executive vice president of memory sales and marketing at Samsung's Semiconductor Business. The key to the production efficiency in the newly developed 50nm process is the use of a selective epitaxial growth transistor (SEG Tr). The 3D transistor has a broader electron channel that optimizes the speed of each chip's electrons to reduce power consumption and enable higher performance. Continued miniaturization of the overall memory circuit and an increasingly limited area of coverage within a wafer cell make it much more difficult to secure and sustain sufficient volumes of electrons. Adding to the 50nm design improvements, the SEG transistor introduces a multi-layered dielectric layer (ZrO2/Al2O3/ZrO2) to resolve weak electrical features. In addition, the new dielectric layer sustains higher volumes of electrons to increase storage capacity, ensuring higher reliability in storing data. Furthermore, Samsung's proprietary RCAT (recess channel array transistor) technology also has been adapted to work well with Samsung's 50nm DRAM process. The RCAT, which effectively doubles the refresh term of DRAM, is a critical technology, supporting higher scalability for DRAM, regardless of chip size - a key feature for enabling circuitry beyond 50nms. Samsung's new 50nm process technology can be applied to a broad range of DRAM chips including graphics and mobile DRAM. With mass production planned for 2008, the 50nm DRAM chip is well positioned to become the mainstay of a DRAM market that is expected to account for US$ 55 billion by 2011, said Samsung.

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