Bill Ray looks at some companies working in the printed electronics field:
“Printed electronics” is one of those terms one sees being bandied about without really knowing what it means or why it’s important. The premise of using printing techniques to create electrical circuits isn’t hard to comprehend, but not everyone agrees on what comprises a “printing technique” or why you might want to use one, so El Reg chatted to three companies at the forefront of the field.
According to these firms, the new printing technique is going to change the literal fabric upon which the electronics industry rests. That’s important as it’s not the electronics which change as a result of the printing process, but rather the material on which those electronics rest. So instead of being etched on silicon the circuits can be laid onto steel, plastic, or even paper, and it’s that change of substrate which links all the various techniques and makes printed electronics so exciting.
[. . .]
This is in contrast to Silicon Valley’s Kovio, which steps away from standard printing equipment but still uses ink-jet techniques to lay down working RFID chips onto a flexible steel substrate.
The mechanism is the same as a desktop ink-jet, only instead of ink the jets squirt out ca conductor into wires as little as eight microns thick, making up chips which will run up to 40MHz or so. But Kovio can print a lot of them very cheaply and hopes to get the Near Field Communications (NFC) standard extended to include its vision of printed RF barcodes, powered by induction from the reading device and able to respond with a standardised serial number.
[. . .]
Such a step is taken by PragmatIC, another Cambridge-based company and one we’ve mentioned before thanks to their light-up beer bottles and induction-powered screens. PragmatIC doesn’t so much print electronics as imprint them, creating a sandwich of materials and then, using a pre-cut die, press down and carve out the shape required.
That might be taking the concept a long way from printing, though PragmatIC reckons it takes printing back to its roots. Imprinting is also the process used to stamp out CDs and Blu-Ray disks, and so is known to work within very strict tolerances. PragmatIC reckons it can get down to 100nm objects placed with 10nm accuracy, leading to transistors around a square-micron in size which (PragmatIC claims) is comparable to silicon technologies.
That means chips can be made cheaper, but more importantly they can be laid onto any surface (there’s no baking in the PragmatIC process) so electronics can be dropped onto the back of polypropylene labels to create the flashing beer bottle or similar, assuming one can find a battery to power it and an LED to light up.
