Polymer inking

Shibusawa, M. Kobayashi, M. Hanari, J. Sunohara, K. Ibaraki, N. 2003. A 17-inch WXGA full-color OLED display using the polymer ink jet technology. IEICE Trans. Electron., E86-C(ll) 2269-2274. 

The ink-jet process relies on using a piezoelectric printhead that can create deformation on a closed cavity through the application of an electric field. This causes the fluid in the cavity to be ejected through the nozzle whose volume is determined by the applied voltage, nozzle diameter, and ink viscosity. The final width of the drop of the substrate is a result of the volume of fluid expelled and the thickness of the droplet on the surface. In addition, the drop placement is critical to the ultimate resolution of the display. Typical volumes expelled from a printhead are 10 to 40 pi, resulting in a subpixel width between 65 and 100 pm. Drop accuracies of +15 pm have been reported such that resolutions better than 130 ppi are achievable however, because the solvent to polymer ratio is so high, the drops must be contained during the evaporation process to obtain the desired resolution and film thickness. This containment can be a patterned photoresist layer that has been chemically modified so that the EL polymer ink does not stick to it. 

Conducting carbon polymer ink, which filled a UV-ablated microchannel, was used to construct the integrated microelectrode on a plastic chip. Both chronoamperometry and CV were employed to detect a model compound (fer-rocenecarboxylic acid) down to 3 iM, corresponding to 0.4 fmol within a volume 120 pL [758], In another report, a carbon-paste electrode was constructed by filling a laser-ablated (PET or PC) channel with C ink. The whole structure was then cured at 70°C for 2 h [189]. 

A benzo[ /]thioxanthene unit has been incorporated in the emission layer of an OLED display <2004USP2004140761> as part of a polycyclic pigment 614 employed for coloring polymers, inks and toners <2000USP6046335> and also as the key component 615 of a red fluorescence-conversion film and associated electroluminescent devices <1998JPP10316964>. 

For a poly(parabanic acid) resin as substrate, a6T as semiconductor, and cyanoethylpullulan, a highly flexible device could be obtained which shows no changes in the transistor characteristic after bending and twisting. However, the metallic gate and source electrodes sometimes disconnect. A really pure all-organic FET with a graphite-based polymer ink used to prepare the source and drain contacts does not even show this instability [305],... 

Screen-printable electroluminescent polymeric inks contain a variety of additives in order to control the viscosity of the electrolmninescent polymer ink, to decrease the solvent evaporation rate, and to improve the ink consistency and working time. ... 

In addition, the additives can improve the charge injection and power efficiency of light-emitting devices manufactured from the screen-printable electroluminescent polymer ink. A formulation of a polymeric electroluminescent ink is shown in Table 3.6. 

K. Bmiard, P. Degee, P. Dubois, Regioselective end-fimctionalization of polylactide oligomers with D-glucose and D-galactose. Polym. Ink 52 (2003) 406-411, doi 10.1002/pi.l050. 

Chem. Descrip. Epoxidized soybean oil acrylate, with 3740 ppm MEHQ Uses Otters flexibility, pigment wetting, high adhesion tor paper coatings, wood coatings, metal coatings, concrete polymers, inks Properties Gardner 4 It. yel. liq. sp.gr. 1.040 vise. 23,000 cps 99% reactive esters... 

Uses Photoinitiator for UV-curable resins, polymers, inks, adhesives, coatings... 

Carter SA, Victor JG, Tuttle S, Breeden J. Screen printable electroluminescent polymer ink. US patent 7115216, assigned to Add-Vision, Inc., Scotts Valley, CA 2006. 

An electrochromic polymer ink contains a colloidal electrochromic polymer pigment dissolved in an aqueous solvent (23,24). 

Alternatively, the method for producing uniform liquid crystal alignment in a liquid crystal cell comprises the steps of providing a substrate, and printing at least one layer of a polymer ink solution onto the substrate with a printer to form a printed pol mier ink layer having a predetermined thickness. Air is then blown upon the printed polymer ink layer to produce induced anisotropy on the printed pol mier ink layer. Using the substrate in a liquid crystal cell provides alignment of liquid crystals in the liquid crystal cell (26). 

Takada, Y. Hakamada, S. Tsujimura, M. Akasaka, A. Nito, Y Mishina, S. Ink compositions containing self-dispersible pigments and acrylic polymers, ink sets therefrom, and method and apparatus for ink jet printing therewith. Jpn. Kokai Tokkyo Koho IP 2006160930, 2006 Chem. Abstr. 2006,145, 64649. 

Conductive polymer-based ECG electrodes can be obtained by either composite film strips or direct depositing conductive polymer ink on textile fabric by digital... 

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