The mass production technique of gravure contact printing is used to fabricate state‐of‐the art polymer field‐effect transistors (FETs). Using plastic substrates with prepatterned indium tin oxide source and drain contacts as required for display applications, four different layers are sequentially gravure‐printed: the semiconductor poly(3‐hexylthiophene‐2,5‐diyl) (P3HT), two insulator layers, and an Ag gate. A crosslinkable insulator and an Ag ink are developed which are both printable and highly robust. Printing in ambient and using this bottom‐contact/top‐gate geometry, an on/off ratio of >104 and a mobility of 0.04 cm2 V−1 s−1 are achieved. This rivals the best top‐gate polymer FETs fabricated with these materials. Printing using low concentration, low viscosity ink formulations, and different P3HT molecular weights is demonstrated. The printing speed of 40 m min−1 on a flexible polymer substrate demonstrates that very high‐volume, reel‐to‐reel production of organic electronic devices is possible.

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textile fabrics, when water droplets are sucked in, a capillary rise test was performed. [16,20] Vertically hanging strips of a textile are immersed with the lower end into a liquid and the rise of the liquid within the textile is observed. Using Washburn's equation the apparent static contact angle within the textile structure can then be obtained by cosh H eq R S rg 2c (1) with the gravitational constant g, the density r and the surface tension c of the liquid. [21] Assuming a complete wetting (cos h = 1) with a liquid of a low surface tension such as decaline (32.3 mN/m), the geometric pore radius R S can be calculated from the saturation height H eq when capillary and gravity are in equilibrium. Using R S derived with decaline, the static water contact angle can then be given for a textile fabric by evaluating the capillary rise test using bi-distilled water (72.2 mN/m). Textile contact angles are compared with the corresponding water contact angles on a flat substrate such as a PET foil using the same plasma treatment. Thus, the capillary rise test enables the evaluation of the penetration of reactive plasma species into the textile structure, which is relevant for the capillary transport during pad dyeing.

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In this paper a new microgripper will be presented. The specific feature is the microfabrication based on a UVlithographic process in microstructurable, photosensitive glass. Technological and manufacturing problems of the gripper will be described. The developed microgripper is actuated by a piezoelectric ceramic (monomorph). Glass microstructures are used as solid state hinges. With the special design of the gripper it is possible to realise a high distance ratio. The deflection of the gripping arms is some hundred micrometers. The gripping forces are a few mN up to 50 mN. The new grippers were fabricated and tested successfully.

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In this work the production of microstructured glasses by means of the drawing technology is presented. The technology and the influence of the process parameters are described. Examples of drawn structures are shown and applications are pointed out.