9:30 AM - 11:30 AM
[20a-P7-24] Fabrication of Thermal Sensors Using Conductive Polymer by Hydrophilic and Hydrophobic Pattering
Keywords:conducting polymer, hydrophilic and hydrophobic pattering, thermal sensors
To realize low cost flexible electronic devices, fabrication of organic electronic devices by printing methods is gathering much attention. From this point of view, simple micro patterning processes unlike multistep process such as photolithography are required. At the same time, we must achieve high accuracy and high yield rate. Therefore, we tried to apply hydrophilic and hydrophobic pattering to paint micro lines of conducting polymer for organic thermal sensors.
We fabricated thermal sensors using conductive polymer poly(3,4-ethylenedioxythiophene) (PEDOT) whose resistance value changes with temperature. To control and equalize resistance values of PEDOT films, hydrophilic and hydrophobic pattering using fluorinated polymer by vacuum-ultraviolet light (172 nm) and subsequent coating of PEDOT solution were applied. Therefore, uniform PEDOT lines of about 50 mm width were obtained by inkjet printing. These 80 lines showed average resistance of 90k ohm and its standard deviation of 3.7k ohm. We also report building thermal sensors with these controlled PEDOT resistors.
We fabricated thermal sensors using conductive polymer poly(3,4-ethylenedioxythiophene) (PEDOT) whose resistance value changes with temperature. To control and equalize resistance values of PEDOT films, hydrophilic and hydrophobic pattering using fluorinated polymer by vacuum-ultraviolet light (172 nm) and subsequent coating of PEDOT solution were applied. Therefore, uniform PEDOT lines of about 50 mm width were obtained by inkjet printing. These 80 lines showed average resistance of 90k ohm and its standard deviation of 3.7k ohm. We also report building thermal sensors with these controlled PEDOT resistors.