F R O N T I E R
Research in detail
Research in detail
The International team has successfully developed the world's lightest
(3 g/m2) and thinnest (2 µm) high-performance organic transistor ICs on
ultrathin (1.2 µm) polyethylenenaphthalate films. To put these values into
perspective, the thickness is about 1/5 of that of plastic kitchen wrap, and the
weight is about 1/30 of that of standard weight office paper. The organic
transistor IC can be used to manufacture a prototype touch
sensor system
consisting of 144 (12 × 12) sensor cells arranged in an effective area of 4.8
× 4.8 cm2 with an intercell spacing of 4 mm.
The key to the development was the successful establishment of a process
technique to form a very uniform ultrathin insulating layer on a 1-µm-thick
polymeric film that has a fairly rough surface. More precisely, the team
established a method to form a 19-nm-thick aluminium oxide layer with
excellent adhesion to the substrate based on anodic oxidation that is carried
out at room temperature. High-energy oxygen plasma treatment, which has
been commonly employed to form aluminum oxide layers on plastic films,
damages ultrathin polymer foils and creates pinholes. The here-developed
methods avoid such high-energy processes and are fully compatible with the
distinct processing requirements of ultrathin and conformable foil substrates.
Imperceptible Electronics are tactile sensors that can be bent, twisted, crumpled, submerged in liquid,
stretched , and more all while performing typical sensor duties in an impossibly thin frame.
Outlook for the future
Imperceptible electronics, namely, extremely thin, lightweight electronics whose presence cannot be perceived,
will realize a wide range of new healthcare, biomedical, and welfare applications. For instance, as sensor systems
become thinner and lighter, the sensors will become so li ????????????????????????????????????Q??????)??????????????????????????????????????????????????????????????????????????)%?????????????????????????????????????????????????????????????????????????????????????)??????????????????????????????????????????????????????????????????????????????????????????)???????Q????????????????????????????????????????????????????????????????????????????)??????????????????????)%???????????????????????????????????????????????????????????????????????????????????????)????????????????????????????????????????????????????????????????????????????????????????????)??????????????????????????????????????????????Q??????????????????????????????????????????????)??????????????????????????????????????????????????????????????????????e??????????????)??????????????????????????????????????????????????????????????????????????????????)????????(?e?????????????????????????????????????????????????????????????????????????????????)-?????????????????????????????????????????????????????????????????????????????????()Q!?1
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