TWI456613B - Improved process for the production of solid-state electrolytic capacitor - Google Patents

Claims (9)

An improved method for manufacturing a solid electrolytic capacitor, comprising the steps of: providing an insulating substrate; forming a plurality of conductive colloids containing aluminum powder on the insulating substrate by partial screen printing, wherein a scribe line is defined between two adjacent conductive colloids; a high temperature sintering process, the conductive colloids are metallized to form a plurality of aluminum substrates, wherein the high temperature sintering process has a temperature ranging from 300 ° C to 500 ° C and a time between 0.5 hours and 1.5 hours; Forming a dielectric layer on each surface of the aluminum substrate; forming an isolation layer on each dielectric layer to define an anode region and a cathode region; and covering a surface of the dielectric layer of each cathode region Conductive layer to make a solid electrolytic capacitor unit. The method for improving the solid electrolytic capacitor according to claim 1, wherein the step of covering the conductive layer further comprises the steps of: forming a conductive polymer layer on the surface of the dielectric layer of each cathode region; Forming a carbon glue layer on each conductive polymer layer; and forming a silver glue layer on each carbon glue layer. The method for improving the solid electrolytic capacitor according to claim 2, wherein the carbon adhesive layer is made of a conductive carbon paste, a carbon paste or a carbon paste. The method for improving the solid electrolytic capacitor according to claim 1, wherein the conductive colloid comprising aluminum powder comprises: 0 to 50% by weight of a thermosetting resin; 30 to 100% by weight of aluminum powder; and 0 to 50 by weight. a percentage of curing agent; 0 to 50% by weight of inorganic filler. An improved method for solid electrolytic capacitors according to claim 4, wherein the aluminum powders have a particle size of between 0.05 and 5 microns. An improved method for solid electrolytic capacitors, comprising the steps of: providing aluminum powder; inserting an extraction electrode into the aluminum powder; and cold pressing the aluminum powder and the extraction electrode by a compression mold, wherein the cold pressing load Between 3 and 15 MN (Mega Newton)/m2 The aluminum powder is pressed together to form an aluminum ingot; a surface of the aluminum ingot is coated with a dielectric layer; and a surface of the dielectric layer is coated with a conductive layer. The method for improving the solid electrolytic capacitor according to the sixth aspect of the invention, wherein the step of coating the conductive layer further comprises the steps of: coating a surface of the dielectric layer with a conductive polymer layer; The surface of the conductive polymer layer is coated with a carbon glue layer; and a surface of the carbon glue layer is coated with a silver paste layer. The improved method of solid electrolytic capacitors according to claim 6, wherein the aluminum powders have a sponge-like uneven surface. An improved method for solid electrolytic capacitors, comprising the steps of: providing an anode foil and a cathode foil; and performing a winding process, placing a separator between the anode foil and the cathode foil, and overlapping the plurality of extraction electrodes The aluminum foil is sprayed on a base foil, and after being dried, a high-temperature sintering process is performed to form an aluminum porous high-temperature sintered body, and then the surface of the aluminum porous high-temperature sintered body is surfaced. Made of an oxide film.