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US 2004/0104450 A1Published application
Solid electrolytic capacitor and method of producing the same
AssigneesNEC Tokin Corporation, NEC TOKIN Toyama, Ltd.
InventorsShinji Arai, Masahiko Tanaka, Kenji Araki
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Abstract
The invention provides a solid electrolytic capacitor, in which non-conductive particles are made to be present between a dielectric layer and an electrolyte layer, and a second electrolyte layer is further formed by a conductive polymer including graphite particles and non-conductive particles.
Claims18
A solid electrolytic capacitor comprising a lead wire;
- an anode member formed by a sintered member of a valve-action metal powder and embedding therein the lead wire;
- a dielectric layer formed on a surface of the anode member;
- a first electrolyte layer formed on the dielectric layer;
- a cathode member formed on the first electrolyte layer;
- a silver paste layer formed on the cathode member;
- external terminals respectively connected to the lead wire and the silver paste layer;
- and a resin package molded so as to expose the external terminals, in which the first electrolyte layer includes particles constituting the cathode member,
- said solid electrolytic capacitor further comprising non-conductive particles between the dielectric layer and the cathode member except the first electrolyte layer, and a second electrolyte layer formed between the dielectric layer and the cathode member, wherein the second electrolyte layer is formed so as to contain the non-conductive particles.
5 more elements
A method of producing a solid electrolytic capacitor, comprising the steps of:
- sintering a valve-action metal powder while embedding a lead wire therein to form an anode member;
- forming a dielectric layer on a surface of said anode member;
- forming a first electrolyte layer on said dielectric layer of said anode member;
- immersing said anode member having the first electrolyte layer in a colloid solution in which non-conductive colloid particles are dispersed, followed by drying;
- forming a second electrolyte layer;
- and
- forming a cathode member so as to sandwich said first electrolyte layer and said second electrolyte layer with said dielectric layer, then forming a silver paste layer on said cathode member, then connecting external terminals respectively with said lead wire and said silver paste layer and applying a resin mold so as to expose said external terminals.
4 more elements
Dependencies are inferred from the claim text.