Operating Specifications for Double Polymeric Thin Films Capacitors
Rafidain Journal of Science,
Volume 28, Issue 3, Pages 128-140
AbstractIn this research two groups of parallel plates capacitors (MIM-Device) with thin polymeric film, were prepared. The first group with a single polymeric film of materials (PMMA) with long saturated chain, (PC) with short saturated chain and (PS) with short unsaturated chain and the thickness is about ((300± 10 )µm(. The second group where the insulating film is of double type of material (PMMA//PS) and (PC//PS) with total thickness about ()300± 10 )µm(. The results showed that the used double thin films may lead to redistribution of the raing of regions of (I-V) characteristics equally which were different when the thin films were single and there was a difference in the raing of regions of (I-V) characteristics of linear polymer chain and these differences are created due to length or shortness of polymer chain and for saturated or unsaturated for this chain, also the results have shown that there is an interface in double polymeric thin film cause and distortion in (C-V) characteristics and it is gone by increasing the amount of thermal energy and the induce electrical filed con be created by effect of external filed and with help of interface in double thin films, the existence of this filed can lead to mismatch in the value of capacity between increase and decrease stages except low values of external field. The increasing of the thermal energy lead to deformation in (C-V) characteristics gradually with increases difference in capacity between increase and decrease stages. The latter strengthens the hypothesis of induced electric field.
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