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Micro-DIMM memory portfolio empowers sub-notebooks

Posted: 30 Jul 2004 ?? ?Print Version ?Bookmark and Share

Keywords:infineon technologies? ddr-micro-dimm? dual in-line memory module? sub-notebook? so-dimm?

To speed up the manufacturing of lighter and smaller sub-notebooks with enhanced functionalities and battery lifetime, Infineon Technologies AG is releasing its new DDR-Micro-DIMM (Dual In-line Memory Module) module. Micro-DIMMs are 65 percent the size of small outline- (SO-) DIMMs with equal capacity. It also has the smallest area footprint of all memory modules at same densities.

Reduction of space for components such as memory modules can increase functionalities and features for sub-notebooks. Micro-DIMMs are manufactured using the 214-pin "mezzanine connector" technique that reduces the size of the module and the area covered by the connector by about 40 percent compared to SO-DIMMs. SO-DIMMs with 200 pins, a form factor that prevents the use of these modules to sub-notebooks, are used by DDR2-based notebooks.

"Expanding our memory product portfolio with DDR2 Micro-DIMMs emphasizes our 'one-stop-shopping strategy' for all kinds of memory needs," expressed Carsten Gatzke, senior director for marketing at the Commodity Memory Products Business Group at Infineon.

The Micro-DIMM portfolio consists of modules with 256MB, 512MB and 1GB densities. The small module PCB is attained with Infineon's single-die 512Mb and 1Gb DDR2 memory components in compact fine-pitch BGA packages. The 256MB and 512MB modules use four and eight single-die 512Mb DDR2 components, respectively. The 60-ball FBGA packages operate at speeds of 400Mbps and 533Mbps. The 1GB module uses eight single-die 1Gb DDR2 components.

The Micro-DIMM portfolio is compliant with the Joint Electronic Device Engineering Council (Jedec) and is preferred by computer motherboard manufacturer Asus.

Even if an on-board memory and a Micro-DIMM slot is enough for most sub-notebooks, two module slots are incorporated to enable memory increase. The use of low-power DDR2 components can also help reduce the power consumption by approximately 50 percent, which would extend battery life, or even allow the use of smaller batteries, in sub-notebooks.

Sub-notebooks weigh around 1kg, about a quarter of a conventional notebook, combining PDA and mobile computing capabilities. Gartner Dataquest predicts it to comprise 17 percent of the notebook market by 2007, with 9.4 million units sold every year.

Sample of Micro-DIMMs are available for PC2-3200 and PC2-4300. The price ranges for 256MB and 512MB are $80-$100 and $150-$170, respectively. Price for the 1GB module is available upon request. Volume production starts on September this year for the 256MB and 512MB Micro-DIMMs, next year for the 1GB module.

- Reden Mateo

Electronic Engineering Times - Asia

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