JPS6011635Y2 - Electrolytic capacitor - Google Patents

Description

【考案の詳細な説明】 本考案は電解コンデンサに関し、とくにチップ型固体電
解コンデンサの電極構造に関する。[Detailed Description of the Invention] The present invention relates to an electrolytic capacitor, and particularly to an electrode structure of a chip-type solid electrolytic capacitor.

近年、電子部品実装技術の高密度化に伴ない電子部品の
一つとして電解コンデンサに対する小型化の要求が高ま
ってきている。In recent years, as electronic component mounting technology has become more dense, there has been an increasing demand for smaller electrolytic capacitors as one of the electronic components.

従来、かかる要求を満すために提供された最小形状の電
解コンデンサの構造は第１図に示すような構造である。The structure of the smallest electrolytic capacitor that has been conventionally provided to meet such requirements is as shown in FIG.

しかし、上記従来構造の電解コンデンサは陽極電極端子
１より突出した陽極引出し線の先端２によって極性判別
をしているが、電解コンデンサの外形寸法を小さくする
ため及び電解コンデンサを印刷配線板等の装置に実装し
たとき、陽極引出し線の先端２が他の部品に接触して短
絡事故を起すことを防ぐため、陽極部引出し線の先端２
の長さは０．１〜０．２ｍｍと極めて短かくしなければ
ならず、極性判別が極めてむずかしいという欠点があっ
た。However, in the conventional electrolytic capacitor described above, the polarity is determined by the tip 2 of the anode lead wire protruding from the anode electrode terminal 1, but in order to reduce the external dimensions of the electrolytic capacitor, In order to prevent the tip 2 of the anode lead wire from coming into contact with other parts and causing a short circuit accident when mounted on the
The length of the electrode must be extremely short, 0.1 to 0.2 mm, which has the drawback that it is extremely difficult to determine the polarity.

かかる従来の欠点を改善するため、第２図に示す如く、
一方の電極端子（第２図では陰極電極端子３に示した）
の上面部を樹脂層４で覆う方法が考えられたが、この方
法では被覆工数が増加するばかりで、、なく、実装面が
矢印５で示される素子下面側のミ゛□の一方に限られて
しまう欠点があり、量産性に適さないことが判った。In order to improve such conventional drawbacks, as shown in Fig. 2,
One electrode terminal (shown as cathode electrode terminal 3 in Figure 2)
A method of covering the upper surface with a resin layer 4 has been considered, but this method not only increases the number of steps required for coating, but also limits the mounting surface to one side of the bottom surface of the element indicated by arrow 5. It was found that this method was not suitable for mass production due to the disadvantage of

本考案の目的はこれら従来の欠点を解決し、更に小型化
された構造のチップ型固体電解コンデンサを提供するこ
とにある。The purpose of the present invention is to solve these conventional drawbacks and provide a chip-type solid electrolytic capacitor with a more compact structure.

本考案によれば、陽極部の形状を維持して陽極部を覆う
絶縁部材と、その絶縁部材から露出した陽極引出し部材
と電気的に接続し、絶縁部材の一部を壱の絶縁部材の形
状を維持して覆う導電被着部と、陰極部の形状を維持し
て陰極部を覆う導電被着部を、＊する電解コ、ンデンサ
マあって、上記陽極部及び陰極部の形状が異なることを
特徴とする電解コンデンサが得られる。According to the present invention, an insulating member that maintains the shape of the anode part and covers the anode part, and an anode lead-out member exposed from the insulating member are electrically connected, and a part of the insulating member is shaped like the first insulating member. There is a conductive adhesive part that maintains and covers the cathode part, and a conductive adhesive part that covers the cathode part while maintaining the shape of the cathode part. An electrolytic capacitor with characteristics can be obtained.

以下本考案の電解コンデンサの構造を図面を参照して説
明する。The structure of the electrolytic capacitor of the present invention will be explained below with reference to the drawings.

〔実施例 １〕 第３図ａ、ｂは本発明の一実施例である。[Example 1] Figures 3a and 3b show an embodiment of the present invention.

従来周知技術により、突出した陽極引出し線６を有し、
かつ陽極引出し線６の部分を頂点とする円弧を有するタ
ンタル、ニオブ、アルミニウム等の弁作用を有する金属
の焼結体上に誘電体酸化皮膜、二酸化マンガン、二酸化
鉛等の半導体層、グラファイト層を順次形成したコンデ
ンサ素子７を作成する。By a conventionally known technique, it has a protruding anode lead wire 6,
A dielectric oxide film, a semiconductor layer such as manganese dioxide, lead dioxide, etc., and a graphite layer are formed on a sintered body of a valve-acting metal such as tantalum, niobium, or aluminum, which has an arc with the apex at the anode lead wire 6. Capacitor elements 7 are sequentially formed.

その後コンデンサ素子７の陽極引出し線６が突出してい
る陽極部側にエポキシ樹脂などの絶縁材料を塗布乾燥し
て絶縁層８を形成する。Thereafter, an insulating material such as an epoxy resin is applied and dried to form an insulating layer 8 on the anode side of the capacitor element 7 from which the anode lead wire 6 protrudes.

次に絶縁層８より突出させである陽極引出し線６を絶縁
層８の表面に沿い幾分突出させて切断する。Next, the anode lead wire 6 protruding from the insulating layer 8 is cut along the surface of the insulating layer 8 so as to protrude somewhat.

次に陽極引出し線６の切断面と絶縁層８の表面及びコン
デンサ素子７の陰極側表面に銅粉末などの導電材料を溶
射して陽極導電端子層９、陰極導電端子層１０を形成し
て電解コンデンサを完成させる。Next, a conductive material such as copper powder is thermally sprayed on the cut surface of the anode lead wire 6, the surface of the insulating layer 8, and the cathode side surface of the capacitor element 7 to form an anode conductive terminal layer 9 and a cathode conductive terminal layer 10, and electrolyze the Complete the capacitor.

ここで、陽極導電端子層９、陰極導電端子層１０を形成
するには従来公知の炎溶射、プラズマ溶射等の溶射技術
を使用できるが、プラズマ溶射技術が最も好ましい。Here, to form the anode conductive terminal layer 9 and the cathode conductive terminal layer 10, conventionally known thermal spraying techniques such as flame spraying and plasma spraying can be used, but plasma spraying technique is most preferred.

以上の如く形成した本考案の電解コンデンサでは、外観
形状から容易に極性判別ができるばかりでなく、従来の
電極端子が不必要となり、長さ、幅、高さのすべてが最
低０．３ｍｍ以内に小型化された。In the electrolytic capacitor of the present invention formed as described above, not only can the polarity be easily determined from the external shape, but the conventional electrode terminals are no longer necessary, and the length, width, and height are all within a minimum of 0.3 mm. Made smaller.

〔実施例 ２〕 実施例１に述べた工程のうち、絶縁層８を形成するのに
プラズマ溶射技術を使用した。[Example 2] Among the steps described in Example 1, plasma spraying technology was used to form the insulating layer 8.

プラズマ溶射により絶縁層８を形成する方法は短時間に
大量生産するのに適するうえ、エポキシ樹脂などの絶縁
性樹脂の樹脂硬化工程が不要であるので工数が大幅に節
減できた。The method of forming the insulating layer 8 by plasma spraying is suitable for mass production in a short time, and also eliminates the need for a resin curing process for insulating resin such as epoxy resin, resulting in a significant reduction in man-hours.

以上本考案によって形成された電解コンデンサは極性判
別が極めて容易であるばかりでなく、外形寸法が小型化
され、大量生産に適する効果は非常に大きい。As described above, the electrolytic capacitor formed according to the present invention not only has polarity extremely easy to distinguish, but also has a small external size, which is very suitable for mass production.

本考案についてはその特定の実施例について記述したが
、頭書の実用新案登録請求の範囲に規定される範囲内に
て多くの変更を行なえることは勿論である。Although the present invention has been described with reference to its specific embodiments, it goes without saying that many changes can be made within the scope of the utility model claims set forth in the heading.

例えば陽極部、陰極部の形状は、円柱上に半球を設けた
構造、長方体に半球を設けた構造等種々の構造が考えら
れる。For example, the anode portion and the cathode portion may have various shapes, such as a structure in which a hemisphere is provided on a cylinder, or a structure in which a hemisphere is provided in a rectangular parallelepiped.

又、絶縁層としては絶縁性樹脂以外にガラス、セラミッ
ク等も可能であり、導電層も溶射以外に導電性塗料の塗
布、金属端子の接続も可能である。In addition to insulating resin, the insulating layer can also be made of glass, ceramic, etc., and the conductive layer can also be coated with conductive paint or connected with metal terminals in addition to thermal spraying.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図、第２図は従来の電解コンデンサの断面図、第３
図は本考案電解コンデンサの一実施例で、ａは断面図、
ｂは斜視図を示す。 １・・・・・・陽極電極端子、２・・・・・・陽極引出
し線の先端、３・・・・・・陰極電極端子、４・・・・
・・樹脂層、５・曲・素子下面、６・・・・・・陽極引
出し線、７・・・・・・コンデンサ素子、８・・・・・
・絶縁層、９・・・・・・陽極導電端子層、１０・・・
・・・陰極導電端子層。Figures 1 and 2 are cross-sectional views of conventional electrolytic capacitors, and Figure 3 is a cross-sectional view of a conventional electrolytic capacitor.
The figure shows an embodiment of the electrolytic capacitor of the present invention, a is a cross-sectional view,
b shows a perspective view. 1... Anode electrode terminal, 2... Tip of anode lead wire, 3... Cathode electrode terminal, 4...
... Resin layer, 5. Curved element bottom surface, 6... Anode lead wire, 7... Capacitor element, 8...
- Insulating layer, 9... Anode conductive terminal layer, 10...
...Cathode conductive terminal layer.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 電解コンデンサ素子の陽極部の形状をほぼ維持して該陽
極部を覆う絶縁部材と、該絶縁部材から露出した陽極引
出し部材と電気的に接続し、前記絶縁部材の一部を該絶
縁部材の形状をほぼ維持して覆う導電被着部と、前記電
解コンデンサ素子の陰極部の形状をほぼ維持して該陰極
部を覆う導電被着部とを有し、かつ前記陽極部及び陰極
部の形状が異なるとともに前記両導電被着部の形状も互
いに異なっていることを特徴とする電解コンデンサ。An insulating member that substantially maintains the shape of the anode part of the electrolytic capacitor element and covers the anode part, and an anode lead-out member exposed from the insulating member is electrically connected, and a part of the insulating member is shaped like the insulating member. a conductive adhered portion that covers the cathode portion while substantially maintaining the shape of the cathode portion of the electrolytic capacitor element, and a conductive adhered portion that covers the cathode portion of the electrolytic capacitor element while substantially maintaining the shape thereof, An electrolytic capacitor characterized in that the shapes of the conductive deposited parts are different from each other.