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Elpida Uses High-k Metal Gate Technology to Develop 2-gigabit DDR2 Mobile RAM


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Oct 9, 2007
34,496 (9.18/day)
Hyderabad, India
Elpida Memory, Inc., Japan's leading global supplier of Dynamic Random Access Memory (DRAM), today announced the DRAM industry's first-ever use of high-k metal gate (HKMG) technology to develop a 2-gigabit DDR2 Mobile RAM (LPDDR2) at the 40nm-class DRAM node.

HKMG is technology that uses insulator film with a high dielectric constant (abbreviated to "high-k," a semiconductor industry measure of how much charge a material can hold) in the transistor gate to reduce current leakage and improve transistor performance. Metal gate electrodes that are required for the high-k dielectrics process are also used. Some makers of logic semiconductors have started to use HKMG, but higher heat treatment temperatures after HKMG formation and complicated DRAM structural characteristics have prevented consistent application in the DRAM fabrication process. Elpida, however, has managed to lower the heat treatment load and overcome certain memory device structural complications.

In producing the new DDR2 Mobile RAM, HKMG technology is able to reduce the electrical thickness of the gate dielectric in the transistor by around 30% compared with a conventional silicon oxide dielectric. The technology also raises DRAM performance by increasing transistor-on current by as much as 1.7 times compared with a silicon oxide film. Transistor-off current can be lowered to less than 1/100th of existing levels, thereby drastically reducing energy consumed in standby mode of DDR2 Mobile RAM.

Elpida plans to apply HKMG technology to produce faster and more energy efficient Mobile RAM devices, the company's mainstay product area.

In addition, Elpida will continue to evaluate and improve HKMG in order to apply the technology at the 30nm and 25nm nodes. Sample shipments of products are planned for FY 2011, with volume production to follow.
Nov 23, 2010
268 (0.10/day)
Good stuff this has been needed for such a long time.
Might be a bit late as the All-In-One pc's is likely to die out or get useless hardware.

Would be good if all memory made for both desktop and laptop is sodimm sized, built for mobile tweaked for desktop heat / power in a desktop. Low power when laptop needed, OC'd laptop specs for Desktop use. This should leave a larger margin for Desktop overclocking / over volting.

Hopefully they could then focus all efforts on sodimm sized ram and produce better hardware / more dense memory chips like this 2gb Elpida and get the laptop / desktop ram to tech evolve much faster.

There is no reason why a sodimm should not perform the same or better than a desktop dimm.

Same for laptop + desktop gpu / cpu, build for mobile hot-rodded for desktop with loads of heat and power space for oc'ing on a desktop. :toast:
Dec 17, 2007
78 (0.02/day)
Toronto, Canada
Processor Intel Core 2 Extreme QX9650
Motherboard ASUS P5Q DELUXE
Cooling Zalman CNPS9900A
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Video Card(s) Sapphire Radeon 4870 512MB
Storage 2x WD 500GB 32MB cache
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Benchmark Scores Benchmarking is for people with OCD.
Why DDR2 RAM and not DDR3 RAM?
Nov 21, 2007
3,684 (0.99/day)
Smithfield, WV
System Name Felix777
Processor Core i5-3570k@stock
Motherboard Biostar H61
Memory 8gb
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Case Haf 912
Audio Device(s) onboard
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Nov 16, 2007
557 (0.15/day)
Processor i7 920
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Software win 7 x64 pro
Benchmark Scores fast...
Mobile as in Tegra III, phones, handheld gamers, non x86 based tech. Although would be great for mainstream and enterprise systems.