| TECHNOLOGY |
Another purely additive process for fabricating organic electronic devices was presented by DuPont's Blanchet. In collaboration with Bell Labs, she and her coworkers are using a dry, laser-based method for printing circuits that contain no metal. The devices incorporate an organic semiconductor, a polymeric dielectric, and electrodes made of polyaniline. The team has demonstrated that this "thermal transfer" process can be used to fabricate a functioning 4,000-cm2 transistor array on a flexible plastic sheet. Such an array could serve as the driver circuitry for an electronic book or a refreshable retail sign. DuPont hopes to commercialize a display product based on this technology within two years, Blanchet told C&EN. The transistor array is flexible enough to be rolled up into a narrow cylinder. The limiting factor is going to be whether there exists a power supply that is thin enough to be incorporated into such a thin product, Blanchet said. Although dry printing is probably the best way to get a first-generation device to market quickly, eventually you'll want to print devices continuously like you print newspapers, Blanchet told C&EN. Unfortunately, the materials and the resolution of the presses are not good enough for that right now. But wait five years, she suggested, and maybe it'll be a different story. |
| UPDATE | 01.03 |
| COMPANY |
- DuPont - Lucent Technologies's Bell Labs |
| LITERATURE REF. | This data is not available for free |
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