Electrical properties of polyimide

Shigetaka Fujita; Katsuyoshi Shinyama; Makoto Baba

doi:10.1117/12.373691

14 December 1999 Electrical properties of polyimide

Shigetaka Fujita, Katsuyoshi Shinyama, Makoto Baba

Proceedings Volume 4017, Polymers and Liquid Crystals; (1999) https://doi.org/10.1117/12.373691
Event: International Conference on Dielectric and Related Phenomena '98, 1998, Szczyrk, Poland

Abstract

This study examines the dielectric characteristics and conduction current characteristics of polyimide (PI) film in a wide temperature range from the room temperature to 500 degrees C using electron beam irradiated specimens. At frequency of 100 Hz, relative dielectric constant began increasing rapidly at about 420 degrees C. The higher the dose, the smaller (epsilon) _r. At 10 kHz, the temperature at which (epsilon) _r began increasing rapidly was higher and the value of (epsilon) _r was smaller. The 100 MGy specimens had the smallest dielectric tangent at both 100 Hz and 10 kHz. At 10 kHz, the temperature at which tan(delta) began increasing rapidly was higher than at 100 Hz. The unirradiated specimens have smaller conduction current than the irradiated specimens up to 250 degrees C, but the unirradiated specimens have larger conduction current than the 100 MGy irradiated specimens at 250 degrees C and higher. At 500 degrees, C the unirradiated specimen became equal to the 5 MGy and 50 MGy specimens. Then, the space charge distribution in the specimens was measured by the PEA method. Both the unirradiated specimens and the 100 MGy irradiated specimens showed small polarization charge due to pulse application, but no charge distribution over 0.7 C/m³ was found.

Citation Download Citation

Shigetaka Fujita, Katsuyoshi Shinyama, and Makoto Baba "Electrical properties of polyimide", Proc. SPIE 4017, Polymers and Liquid Crystals, (14 December 1999); https://doi.org/10.1117/12.373691

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