ELECTRET STRUCTURE AND METHOD FOR MANUFACTURING SAME, AND ELECTROSTATIC INDUCTION-TYPE CONVERSION ELEMENT

摘要

Provided is an electret structure (1) having: a fluorine resin film (21); a back electrode (22) formed on one surface of the fluorine resin film (21); and a silica layer (20) formed on the other surface of the fluorine resin film (21); the silica layer (20) comprising a plurality of insular silica regions (201) covering the fluorine resin film (21) in a mutually isolated state, a negative charge being attached to the insular silica regions (201). An electrostatic induction-type conversion element in which the electret structure (1) is used can be mounted on a substrate by reflow using a Pb-free solder.