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Process influence on electro-wetting display insulator material property[J]. Journal of South China Normal University (Natural Science Edition), 2015, 47(6): 42-47.
Citation: Process influence on electro-wetting display insulator material property[J]. Journal of South China Normal University (Natural Science Edition), 2015, 47(6): 42-47.

Process influence on electro-wetting display insulator material property

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The National Natural Science Foundation of China

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  • Received Date: June 16, 2015
  • Revised Date: June 29, 2015
  • Electrowetting display is a kind of device that use fluororesin layer (e.g. AF1600) as the hydrophobic insulating layer. It works with changing applied voltages to change the surface wettability of liquid. In order to get better adhesive properties for photoresist layer and the fluororesin layer, ion itching should be done to increase the wettability. Electro-wetting properties need to be restored by recovering fluororesin hydrophobic wetting properties after photolithography. A usual method is high temperature reflow. This method would melt leveling thefluorine resin surface, but high temperature would also cause defects like yellowing photoresist material, pixel grid deformation etc. In this paper , instead of high temperature reflow method, vapor redissolve method was suggested to recover hydrophobicity, using a fluorocarbon solvent(HFE7100) steam to dissolve fluororesin layer surface roughened sol state. After heating, the solvent was evaporated to restore the hydrophobic nature of its surface. Focus on the dissolving time, drying temperature and drying time, deep research was done in this paper. Comparion on physical effects and photoelectric effects to electrowetting display devices are made between these two methods.
  • [1]Shibuichi S, Yamamoto T, Onda T, et al.Super water and oil repellent surfaces resulting from fractal structure[J].Journal of Colloid and Interface Science, 1998, 208(1):287-294 [2] David Q.Wetting and roughness[J].Annual Review of Materials Research, 2008, 38(1): 71-99 [3]Kang K H.How electrostatic fields change contact angle in electrowetting[J].Langmuir, 2002, 18(26):10318-10322 [4]Verheijen H J J, Prins M W J.Reversible electrowetting and trapping of charge: model and experiments[J].Langmuir, 1999, 15(20):6616-6620 [5]Hendriks B H W,Kuiper S,Van As M A J,et al.Electrowetting based variable focus lens for miniature systems[J].Optical Review, 2005, 12(3):255-259 [6] Paik P, Vamsee K P, Michael G P, et al.Electrowetting-based droplet mixers for microfluidic systems[J].Lab on a Chip, 2003, 3(1):28-33 [7] Hayes R A, Feenstra B J.Video-speed electronic paper based on electrowetting[J].Nature, 2003, 425(6956):383-385 [8] Lippmann G.Relation entre les phénomènes électriques[J].Annales de Chimie et Physique, 1875, 5(1):494-548 [9]Lee G, Moon H, Fowler J, et al.Electrowetting and electrowetting on dielectric for microscale liquid handling[J].Sensors and Actuators. A: Physical, 2002, 95(2):259-268 [10]Chang H C, Chang J K.Large slip of aqueous liquid flow over a nanoengineered superhydrophobic surface[J].Virtual Journal of Nanoscale Science and Technology, 2006, 13(8):066001-066001 [11]Datta A, Eom I A, Dhar A, et al.Microfabrication and characterization of Teflon AF-coated liquid core waveguide channels in silicon[J].Sensors Journal, IEEE, 2003, 3(6):788-795 [12]Anamelechi C C, Truskey G A, Reichert W M.Mylar (TM) and Teflon-AF (TM) as cell culture substrates for studying endothelial cell adhesion[J].Biomaterials, 2005, 26(34):6887-6896

    [1]Shibuichi S, Yamamoto T, Onda T, et al.Super water and oil repellent surfaces resulting from fractal structure[J].Journal of Colloid and Interface Science, 1998, 208(1):287-294 [2] David Q.Wetting and roughness[J].Annual Review of Materials Research, 2008, 38(1): 71-99 [3]Kang K H.How electrostatic fields change contact angle in electrowetting[J].Langmuir, 2002, 18(26):10318-10322 [4]Verheijen H J J, Prins M W J.Reversible electrowetting and trapping of charge: model and experiments[J].Langmuir, 1999, 15(20):6616-6620 [5]Hendriks B H W,Kuiper S,Van As M A J,et al.Electrowetting based variable focus lens for miniature systems[J].Optical Review, 2005, 12(3):255-259 [6] Paik P, Vamsee K P, Michael G P, et al.Electrowetting-based droplet mixers for microfluidic systems[J].Lab on a Chip, 2003, 3(1):28-33 [7] Hayes R A, Feenstra B J.Video-speed electronic paper based on electrowetting[J].Nature, 2003, 425(6956):383-385 [8] Lippmann G.Relation entre les phénomènes électriques[J].Annales de Chimie et Physique, 1875, 5(1):494-548 [9]Lee G, Moon H, Fowler J, et al.Electrowetting and electrowetting on dielectric for microscale liquid handling[J].Sensors and Actuators. A: Physical, 2002, 95(2):259-268 [10]Chang H C, Chang J K.Large slip of aqueous liquid flow over a nanoengineered superhydrophobic surface[J].Virtual Journal of Nanoscale Science and Technology, 2006, 13(8):066001-066001 [11]Datta A, Eom I A, Dhar A, et al.Microfabrication and characterization of Teflon AF-coated liquid core waveguide channels in silicon[J].Sensors Journal, IEEE, 2003, 3(6):788-795 [12]Anamelechi C C, Truskey G A, Reichert W M.Mylar (TM) and Teflon-AF (TM) as cell culture substrates for studying endothelial cell adhesion[J].Biomaterials, 2005, 26(34):6887-6896

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