@article{SborikasQiuWirgesetal.2014,
  author    = {Sborikas, Martynas and Qiu, Xunlin and Wirges, Werner and Gerhard, Reimund and Jenninger, Werner and Lovera, Deliani},
  title     = {Screen printing for producing ferroelectret systems with polymer-electret films and well-defined cavities},
  series = {Applied physics : A, Materials science \& processing},
  volume    = {114},
  journal   = {Applied physics : A, Materials science \& processing},
  number    = {2},
  publisher = {Springer},
  address   = {New York},
  issn      = {0947-8396},
  doi       = {10.1007/s00339-013-7998-3},
  pages     = {515 -- 520},
  year      = {2014},
  abstract  = {We report a process for preparing polymer ferroelectrets by means of screen printing-a technology that is widely used for the two-dimensional patterning of printed layers. In order to produce polymer-film systems with cavities that are suitable for bipolar electric charging, a screen-printing paste is deposited through a screen with a pre-designed pattern onto the surface of a polymer electret film. Another such polymer film is placed on top of the printed pattern, and well-defined cavities are formed in-between. During heating and curing, the polymer films are tightly bonded to the patterned paste layer so that a stable three-layer system is obtained. In the present work, polycarbonate (PC) films have been employed as electret layers. Screen printing, curing and charging led to PC ferroelectret systems with a piezoelectric d (33) coefficient of about 28 pC/N that is stable up to 100 C-a similar to. Due to the rather soft patterned layer, d (33) strongly decreases already for static pressures of tens of kPa. The results demonstrate the suitability of screen printing for the preparation of ferroelectret systems.},
  language  = {en}
}