| POLYMERS Vol.61 No.3 |
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COVER STORY
Epoch-Making Polymer Materials for Electronics |
| COVER STORY: Highlight Reviews |
| Printable and Stretchable Conductive Wirings | Masaya NOGI, Teppei ARAKI, Katsuaki SUGANUMA, Masaro KOGURE, Osamu KIRIHARA |
| <Abstract>
Smart textiles such as wearable computers and health-care sensors on everyday
clothing will be realized likely in the near future. Here, we review
latest technologies of stretchable wirings and report our achievements
that highly electrical conductors were fabricated by filling half of
the volume of a polyurethane elastomer with microsized silver flakes. Keywords: Silver Flakes / Elastomer / Conductive Composites / LED / Conductive |
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| Recent Progress and Future Prospects of Ambient Electronics Using Organic Electronic-Functional Materials | Tsuyoshi SEKITANI, Takao SOMEYA |
| <Abstract> We report recent progress and future prospects of flexible electronics that are
focusing on molecule electronic materials based on thin film transistors
for opening up a new era of electronics. Furthermore, taking full advantages
of flexible electronics, we demonstrate the developments of next generation's
human/machine interfaces,
bio/medical electronics, and ambient electronics where the electronics
are embedded into a circumstance of life. Keywords: Organic Transistors / Flexible Electronics / Integrated Circuits / Bio/Medical Electronics |
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| Fabrication of Hybrid Polymer Films with Thermal Stability and High Transparency Based on Silsesquioxane Polymers | Tokuji MIYASHITA, Kazuhiro YOSHIDA |
| <Abstract> Recently,
hybrid polymers with novel electronic and optical properties have received
much attention as new base-polymers for printable and flexible soft nano-device
fabrication. In this paper, we describe the fabrication of hybrid polymer
films with thermal stability and high transparency by polymerization
of a double decker shaped silsesquioxane monomer and the network formation
using hydrosilylation reaction. Keywords: Hybrid / Double Decker Shaped Silsesquioxane / Transparent Film / Polymer / Printable and Flexible / Soft Devices |
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| COVER STORY: Topics and Products |
| A New Spray Deposition Technique to Fabricate Polymer Electronic Devices | Katsuhiko FUJITA |
| <Abstract> The
polymer thin film preparation technique, Evaporative Spray Deposition
using Ultradilute Solution (ESDUS), has enabled the fabrication of layered
structures of distinct polymer semiconductors dissolved in the same solvent.
We have successfully demonstrated the significant improvement of a polymer
light emitting
device and a bulk heterojunction photovoltaic cell by Employing layered
structures. Keywords: Organic electronics / Organic Light Emitting Devices / Organic Photovoltaic Cells / Spray Deposition / Polymer Thin Film |
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| Printable Organic Semiconductors: Solution-Processed High-Mobility Organic Transistors | Jun TAKEYA |
| <Abstract> High-performance
solution-processed organic semiconductor transistors are developed forming
organic single crystal films for active layers. The high-mobility charge
transport is based on the band-transport mechanism shown by Hall-effect
measurement. Keywords: Organic Semiconductor / Organic Transistor / Organic Crystal / Solution Process |
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| Graphene | Hiroki AGO |
| <Abstract> Graphene
has attracted a great interest because of its unique physical properties
and possible applications in many fields. For electronic applications,
synthesis of a high-quality, large-area graphene film is important. Our
hetero-epitaxial CVD approach is described together with the future prospect
of graphene research. Keywords: Graphene / Electronic Applications / CVD / Epitaxial |
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| Advanced Trench Filling Process by Selective Copper Electrodeposition for Ultra Fine Printed Wiring Board Fabrication | Hiroshi NAKANO |
| <Abstract> A
Trench-filling process for fabricating ultra-fine-pitch printed wiring
boards was developed by combining nano-imprint lithography (NIL) and
selective copper deposition. Copper was electrodeposited selectively
inside the trenches fabricated in the dielectric layer by NIL without
causing excess deposition on the surface. The selective deposition was
realized by a novel electrolyte containing an inhibiting additive. The
process of recessed interconnections is described. Keywords: Copper / Electrodeposition / Selective Deposition / Trench Filling Process / Nano-Imprint Technology |
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| Polymer Science and I: A Personal Account |
| Encouragement to Challenge the Unknown World | Shinobu UEMURA |
| <Abstract> “An attempt is sometimes easier than expected.” When you try something that you don't know, you can find often unexpected and valuable things. |
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| Front-Line Polymer Science |
| Development of New Electron Microscopy Techniques Using Ionic Liquids | Susumu KUWABATA |
| <Abstract> Ionic
liquids possess negligible vapor pressure that allows us to put the liquids
in a vacuum chamber without any vaporization of the liquid. This fact
led us to attempt the observation of ionic liquids by a scanning electron
microscope (SEM). Surprisingly it has been found that ionic liquids can
be observed without any charging of the liquid. This result means that
ionic liquids behave as electrically conducting materials in SEM observation.
Based on this finding, it was initiated to develop new electron microscopy
techniques; putting ionic liquids on the surfaces of insulating materials
for their observation by SEM, SEM observation of bio-materials wetted
by ionic liquids, and SEM observation of chemical reactions occurring
in ionic
liquids. In the latest case, elemental analysis by electron dispersive
X-ray spectroscopy conducted at the same time was also found to be a
significant technique to clarify reaction mechanisms. Keywords: Ionic Liquid / Electron Microscope / SEM / SEM Observation of Wetted Samples / In Situ SEM Observation of Chemical Reactions / Energy Dispersive X-Ray Spectroscopy / EDX / In Situ EDX Analysis |
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