- The Washington Times - Wednesday, November 12, 2003

SAN JOSE, Calif. (AP) — A new memory technology promises to store more data at a lower cost than the expensive-to-build silicon chips used by popular consumer gadgets such as digital cameras, cell phones and portable music players.

The magical ingredient isn’t smaller transistors or an exotic material cooked up by the semiconductor industry.

It’s a plastic.

Researchers at Princeton University and Hewlett-Packard Co.’s HP Labs developed the memory, technically a hybrid that contains a plastic film, a flexible foil substrate and some silicon. The findings appear in the journal Nature today.

Unlike flash memory found in consumer devices, the new technology can be written to only once, although it can be read many times. In that respect, it acts like a nonrewriteable compact disc. But the new memory, which retains data even when there’s no power, won’t require a power-hungry laser or motor to read or write, and promises more capacity.

“For music or photographs, it’s actually an advantage to have something you can’t rewrite,” said Warren Jackson, one of the paper’s co-authors and scientist at HP Labs.

“Even in accounting, it would be quite useful if you have a trail of files that you can’t erase.”

The goal is to make the technology fast enough to store video.

It also could become one of those items people need to keep buying because once they fill up a card, they’ll need more.

Because production would be simpler, costs for consumers should be lower on a per-megabyte basis than today’s flash memory, researchers said. Yet, it has the potential to store considerably more data.

“We’re looking at a different way of manufacturing that we think will eliminate clean rooms and be a lot less expensive in the end,” said Craig Perlov, an HP Labs scientist and another co-author of the research paper.

The new memory, which could end up in a small format similar to CompactFlash or SD Cards, doesn’t use transistors to store information. Instead, bits are written when a strong current passes through a polymer fuse, causing it to blow and change its conductivity. Smaller currents determine what junctions are opened or closed, which translates into the digital world’s ones and zeros, to retrieve the contents.

Because manufacturing wouldn’t require vacuum chambers or high temperatures, layers could be stacked atop each other. Such stacking has yet to be attempted.

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