Wettability of solid surfaces with liquids is governed by the chemical properties and the microstructure of the surfaces. As far as the microstructure of a surface is concerned, fine roughness is well-known to enhance the hydrophobic and hydrophilic properties. 1,2 A hydrophobic surface, in which the contact angle for water is enhanced by small roughness and is larger than about 150°, is called "superhydrophobic," and a hydrophilic surface, in which the contact angle is similarly enhanced by small roughness and is less than 5°, is called "superhydrophilic." Very recently, we have succeeded in forming transparent, superhydrophobic coating films on glass plates through the sol-gel method by the combination of microstructural and chemical approaches. 3,4 Alumina thin films with roughnesses of less than 50 nm were formed by immersing the porous alumina gel films in boiling water, and we named this the "flowerlike structure." Coating of hydrolyzed fluoroalkylsilane (FAS) on this flowerlike Al 2 O 3 produced the superhydrophobic surface; the contact angle for water was about 165°. The roughness led to the extremely high water repellency. We also reported that the contact angle for water of the surface was drastically decreased with heat treatment at temperatures higher than 500°C because of thermal decomposition of the fluoroalkyl chain in FAS. 5 On the other hand, patterning of a surface into regions of different surface free energies using selfassembled monolayers has been reported. [6][7][8][9][10][11] This pattern is, for example, applied to selective deposition of tantalum oxide thin film. 10 However, these studies have focused on the control of the chemical properties of surfaces with self-assembled monolayers, and the difference of the contact angle for water is smaller than 90°; this may limit practical applications of the hydrophobic-hydrophilic patterns. It has also been reported that hydrophobic character of a super-water-repellent surface can be changed by UV irradiation through photoisomerization of an organic compound; however, the difference of contact angle for water is around 80°. 12,13 UV irradiation on TiO 2 surfaces has been also reported to induce the change in contact angle from 72°t o 0°. 14 However, the hydrophilic surface becomes hydrophobic again with storage.In the present paper, we demonstrate the conversion of a superhydrophobic into a superhydrophilic surface by UV irradiation, where the hydrophobic and hydrophilic properties are enhanced by a fine roughness. The formation of superhydrophobic-superhydrophilic micropatterns is also reported by the application of this conversion technique.Schematic representation for the formation of superhydrophobic-superhydrophilic patterns is shown in Figure 1. First, the alumina thin films (about 200 nm thick) with roughness of less than 50 nm were prepared using aluminum tri-sec-butoxide, isopropyl alcohol, ethyl acetoacetate, and water, as reported previously. [3][4][5] The coating was carried out on soda lime glass plates in a dipping-withdrawing ma...

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We succeeded in G8 factory for mass production of Indium-Gallium-Zink-Oxide thin-film transistor (IGZO-TFT) for the first time in the world. The initial TFT process was an etching stop-type TFT, but now, we are mass producing channel etching-type TFTs. And, its application range is smartphones, tablets, PCs, monitors, TV, and so on. In particular, because of recent demands for high-resolution and narrow frame, our IGZO display has been advanced in technology development with gate driver in panel. In this paper, we report development combining low resistance technology and the latest IGZO-TFT (IGZO5) for large-screen 8K display.

Al2O3 gel films were prepared on poly(ethylene terephthalate) substrates from Al(O–sec-C4H9)3 chemically modified with ethyl acetoacetate. A small roughness of about 20–50 nm was found to form on the Al2O3 gel films dried at room temperature and then immersed in hot water at 60 °C. When hydrolyzed fluoroalkyltrimethoxysilane was coated on the Al2O3 films, transparent thin films with contact angle for water to be more than 150° were obtained.

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We have developed IGZO-TFT with high mobility and high reliability. In this paper, we report on the development of 4 side narrow border 13.4-inch UHD prototype display operating at 120Hz with newly developed high ON current TopGate IGZO-

We succeeded in G8 factory for mass production of IGZO‐TFT for the first time in the world. The initial TFT process was an ES type TFT, but now we are mass producing CE type TFTs. And, its application range is smartphones, tablets, PCs, monitors, TV and so on. In particular, due to recent demands for high resolution and narrow frame, our IGZO display has been advanced in technology development with GIP (Gate driver In Panel). In this paper, we report development combining low resistance technology and the latest IGZO‐TFT for large‐screen 8K display.