FREMGANGSMAADE TIL FREMSTILLING AF ET ELEKTRET OG ANLAEG TIL UDOEVELSE AF FREMGANGSMAADEN

摘要

The permanent electric polarization is imparted to the sensitive element by electronic bombardment within an enclosure wherein prevails a rarefied atmosphere and in which said bombardment is followed with a coating of the so-polarized sensitive element with a film of liquid of very low saturating vapor pressure whose dielectric strength is higher than that of the rarefied air of the enclosure and having advantageously lubricating properties.