Technology
The market of the organic
light emitting display is expected to grow dramatically in the near future
because the organic EL TV will be thinner and higher in image quality than the
LCD TV. The thin-film transistor (TFT) affects greatly the image quality and
power consumption of an organic EL TV. Idemitsu Kosan built a trial product of a
drive element to be used for the organic EL display using new materials. It has
over 40 times more processing capacity than the drive element made of silicon
currently widespread and over 4 times more processing capacity than the new
element to be employed by Samsung Electronics.
The company built
the trial product using a semiconductor material of indium gallium oxide (IGO).
It adjusted the blending quantity of gallium and developed a high-quality and polycrystal
thin film using its self-developed film forming technology. The new element has
more than 40 times higher mobility than amorphous silicon. Samsung Electronics
is reported to consider adopting indium gallium zinc oxide (IGZO) developed by
a researcher of Tokyo Institute of Technology (TIT). Idemitsu’s new product has
four times higher mobility than the TIT’s product, thus the element can be
smaller.
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