DRAM makers using either trench or stack technology seem to be facing a bottleneck on their migration to 70 nm from 90 nm processes, and are putting out 80 nm products as a transitional process in the meantime, according to industry sources. Already running production at the 90 nm level, all major DRAM makers are stepping up development of 70 nm processes in order to further cut manufacturing costs and to migrate to DDR3, the sources indicated.
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