Capacitor manufacturing process
AssigneeIntegrated Power Components, Inc.
InventorW. Richard Frederick
Life of this patent
Estimating the term…
Abstract
A method of fabricating an electrical capacitor from a wound laminate of conductive and non-conductive materials comprises the steps of enclosing the wound laminate in a sealed chamber; drawing a vacuum on the chamber to evacuate any voids in the wound laminate, and then filling the chamber with a pressurized impregnating gas to fill the evacuated voids in the wound laminate; heating the laminate to a curing temperature; applying schoopage metal to opposite ends of the cured laminate; attaching a pair of electrical leads to the schoopage metal on opposite ends of the cured laminate, and encapsulating the cured laminate in a molded polymer.
Claims19
A method of fabricating an electrical capacitor from a wound laminate of conductive and non-conductive materials, said method comprising the steps of
- enclosing the wound laminate in a sealed chamber,
- drawing a vacuum on said chamber to evacuate any voids in the wound laminate, and then filling said chamber with a pressurized impregnating gas to fill the evacuated voids in the wound laminate,
- heating the laminate to a curing temperature,
- applying schoopage metal to opposite ends of the cured laminate,
- attaching a pair of electrical leads to the schoopage metal on opposite ends of the cured laminate, and
- encapsulating the cured laminate in a molded polymer.
A method of encapsulating an electronic component comprising the steps of
- providing a U-shaped cavity,
- lining the U-shaped cavity with a strip of polymeric film which projects slightly beyond the ends of said cavity,
- closing the ends of said cavity with plates having resilient surfaces which engage the projecting edges of said film,
- placing a predetermined amount of liquid encapsulating resin in the lined cavity,
- immersing the electronic component in the liquid resin within the lined cavity with the leads of the component projecting upwardly above the lined cavity,
- solidifying the liquid resin around the immersed electronic component so that the resin bonds to the body of the component, the portions of the leads directly adjacent the component body, and the lining film, and
- withdrawing the side plates from the ends of said cavity and removing the encapsulated component from said cavity.
A method of fabricating wound electrical capacitors each of which comprises a wound laminate of conductive and non-conductive materials, said method comprising the steps of
- wrapping at least the edge portions of the wound laminate, at both ends thereof, with a film which extends continuously around the entire periphery of the end face of the laminate and projects beyond the ends of the main body portion of the laminate,
- arranging multiple wound laminates side-by-side so that the projecting portions of said film on adjacent laminates are parallel and contiguous,
- applying schoopage metal to the exposed ends of the multiple laminates so that the projecting portions of the said film prevent the bridging of schoopage metal between adjacent laminates, and
- attaching a pair of electrical leads to the schoopage metal on opposite ends of each laminate, while said film remains on the wound laminate to become a permanent part of the capacitor.
Dependencies are inferred from the claim text.