US 5,513,424 A · Method for the manufacture of foil capacitors

Abstract

A method for the manufacture of foil capacitors with metallized plastic films, said method comprising the following steps: coiling at least one pair of metallized plastic films so as to form the stacked structure of the capacitors; metallizing the lateral faces of the coiled structure in order to create the plates of the capacitors; cutting out the coiled and metallized structure, or parent capacitor, into semi-finished capacitors; putting the semi-finished capacitors and their connection wires through a cleansing flux; soldering the connection wires to the plates of the semi-finished capacitors; wherein the soldering is done by wave soldering and wherein, between said metallization and said cutting, a heat treatment operation designed to give the plastic film the characteristics needed to withstand the wave soldering and a new metallization designed to ensure the mechanical and electrical quality of the connections are carried out successively.

Claims10

Dependent claims

A method for making foil capacitors comprising the steps:

coiling at least one pair of metallized plastic film foils on a large diameter wheel to form a metallized stack having axially separated planar lateral parallel faces;
metallizing the lateral parallel faces of the stack with a first metal;
subjecting the stack to a heat-treatment occurring at approximately 170.degree. C. for approximately one hour for elevating the melting point of the plastic film;
metallizing the lateral parallel faces of the stack with a second metal having good wettability characteristics, the first and second metals constituting the plates of said foil capacitor;
cutting the metallized stack at spaced points in a direction perpendicular to the planes of the lateral parallel faces;
mounting connections to the plates of said foil capacitors;
subjecting said foil capacitors to cleaning flux;
wave-soldering the connections to the plates of said foil capacitors, said wave-soldering occurring with a molten alloy being 60% tin and 40% lead and whose temperature is 205.degree. C.

5 more elements

Dependencies are inferred from the claim text.

Method for the manufacture of foil capacitors

Life of this patent

Method for the manufacture of foil capacitors

Life of this patent

Abstract

Claims10