Development of World’s First 2-gigabit DRAM based on High-K Metal Gate Technology
Elpida Memory has announced the development of industry’s first DRAM based on high-k metal gate (HKMG) technology. The new DRAM is a 2-gigabit DDR2 Mobile RAM (LPDDR2) at the 40nm-class. HKMG is a technology that was developed to reduce current leakage and improving transistor performance. The technology uses insulator film with a high dielectric constant in the transistor gate. In addition to this, metal gate electrodes which are required in high-k dielectric process are used.
There have been attempts to use HKMG by makers of logic semiconductor but higher heat treatment temperatures after HKMG formation plus complicated DRAM structural characteristics have hampered the effort in DRAM fabrication process. Use of HKMG technology in development of new DRR2 Mobile RAM has contributed in reduction of electrical thickness of the gate dielectric in the transistor by around 30% in comparison to silicon oxide dielectric, plus it has increased the DRAM performance by increasing transistor-on current by as much as 1.7 times in comparison with silicon oxide film. Furthermore, the employment of the HKMG technology can drastically reduce energy consumption in standby mode for DRR2 Mobile RAM.
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[...] Elpida Memory and its subsidiary company Akita Elpida Memory have announced the a joint development of a new ultra-thin DRAM manufacturing technology to mass produce a 0.8mm four-layer DRAM package, which is the thinnest memory device in the DRAM industry according to the company. This ultra-thin package comprises of 4 low-power consumption 2 Gigabit DDR2 Mobile RAM™ chips which was made using Package on Package (PoP) technology. The PoP technology was utilized due to its space saving advantages by reducing mounting space as well as wire length. The reduction in d when memory and wire length will minimizes the impact of reflection and noise that is generated when memory and ASIC chips combined. The technology is expected to see a rapid expansion in mobile device market. The new eco-friendly DRAM is a perfect fit for thin smartphones as well as tablet PCs, requiring higher memory density. Share and Enjoy: [...]