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Light-emitting diode manufacturer Stanley Electric is pushing ahead with the development of an LED printer head, and is working on a linear arrangement of LEDs on the head, using diodes 40 microns across by 60 microns down, concentrated at a density of 12 per millimetre to achieve 2,432 luminous parts in a linear array at micron density for an A4 page; current LED printers have problems with pitch and interference but Stanley reckons its devices and wire bonders have largely automated the LED array process and solved the problems; the price of $360 for an A4 array is high for a laser printer head, but mass production is expected to cut it.

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