Organic Films for Discrete Elements for R-C Networks

摘要

The development of capacitors with high capacitance-to-volume ratio from thin organic films cast upon a liquid surface has been carried forward to production of a rolled unit with a polysulfone dielectric and vacuum-deposited electrodes with capacitance 0.005860 microfarad, D = 0.004, volume = 7.6 x 10 to the -4th power in(3), 30 WVDC. The feasibility of improving this to C = 0.01 microfarad, D = 0.004, 1000 WVDC, volume 2.75 x 10 to the -5th power in(3), was demonstrated by dielectric measurements. Polysulfone and poly (phenylene oxide) were evaluated as capacitor dielectrics. Dielectric constant and loss was confirmed to be constant over the temperature range 22 to 150 C, with loss below the 0.005 level. Breakdown strength after metallization was 10 to the 5th power v/cm. In an intrinsic breakdown test it exceeded 10 to the 7th power v/cm. Attempts were made to prepare tractable stable glow-discharge polymers. The polymers are very highly crosslinked from the audio-frequency discharge even when prepared at low temperature. Some progress was made toward elucidating the instability of these films. Used with cast films, they should increase further the ultimate capacitance-to-volume ratio.