Printable electronics uses room-temperature processing to fabricate transistorized circuitry atop cheap plastic substrates, sidestepping the usual need for expensive high-temperature semiconductor processing. Printing displays using ink-jet technology works by loading the liquid "color" cartridges with liquid-semiconductors, -insulators and -conductors--all transparent. Then using micro-electro-mechanical system (MEMS) jets, pico-liter droplets of the electronic circuit materials can be deposited in patterns without the waste of conventional semiconductor processing. Look for printed versions of displays using organic light-emitting diodes within two years.
Printing high-definition organic LED (OLED) displays with ultrahigh-resolution inkjet printers will lower the cost and increase the color accuracy of flat-panel televisions, according to Seiko Epson Corp. Tokyo-based Seiko Epson will reveal details of its fabrication process at the Society for Information Display (SID) International Symposium, Seminar and Exhibition, running May 31-June 5 in San Antonio, Texas. Epson's OLED Development Center will show an ink-jet printed 14-inch OLED display that the company claims has the same resolution as, and better color accuracy than, today's 37-inch 1080p high-definition TVs.