JPH0625954Y2 - Cylindrical capacitor - Google Patents
Cylindrical capacitorInfo
- Publication number
- JPH0625954Y2 JPH0625954Y2 JP1985012128U JP1212885U JPH0625954Y2 JP H0625954 Y2 JPH0625954 Y2 JP H0625954Y2 JP 1985012128 U JP1985012128 U JP 1985012128U JP 1212885 U JP1212885 U JP 1212885U JP H0625954 Y2 JPH0625954 Y2 JP H0625954Y2
- Authority
- JP
- Japan
- Prior art keywords
- dielectric
- internal electrode
- peripheral surface
- external electrode
- electrode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Description
【考案の詳細な説明】 （産業上の利用分野） 本考案は、プリント基板の配線部に内部電極及び外部電
極を直接半田付けする筒形コンデンサに関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a cylindrical capacitor for directly soldering internal electrodes and external electrodes to a wiring portion of a printed circuit board.
（従来の技術） 上記の筒形コンデンサにおいて、両端部にキャップを嵌
着したものは、小型で且つ大容量のものを取得する場
合、厚みの薄い誘電体を用いなければならないので、キ
ャップの嵌着時に誘電体が破損する欠点があり、また、
キャップが高価であるのでコスト高となる欠点があっ
た。これに対し、キャップのない筒形コンデンサはより
小型になり、高静電容量値が得られると共に安価であ
る。(Prior Art) In the above-mentioned tubular capacitor, caps fitted to both ends are required to use a thin dielectric material in order to obtain a small size and large capacity. There is a drawback that the dielectric is damaged when wearing,
Since the cap is expensive, there is a drawback that the cost is high. On the other hand, a cylindrical capacitor without a cap becomes smaller, has a high capacitance value, and is inexpensive.
この筒形コンデンサは第２図に示すように、筒形磁器誘
電体ａの内周面の一部から該誘電体ａの一端面を介して
外周面の端縁部まで連続して形成された内部電極ｂと、
該誘電体ａの外周面の他部と他端面に連続し且つ内部電
極ｂと絶縁して形成された外部電極ｃを有し、外周面の
一部と内周面全面とが絶縁被覆ｆで覆われている。As shown in FIG. 2, this cylindrical capacitor is formed continuously from a part of the inner peripheral surface of the cylindrical ceramic dielectric a through one end surface of the dielectric a to the edge of the outer peripheral surface. Internal electrode b,
The dielectric a has an external electrode c which is continuous with the other end of the outer peripheral surface and the other end and is formed so as to be insulated from the internal electrode b. A part of the outer peripheral surface and the entire inner peripheral surface are covered with an insulating coating f. Is covered.
この筒形コンデンサをプリント基板ｄの配線部ｇにフロ
ー半田付け法により半田付けした場合、例えば誘電体ａ
の外径が1mm、長さが2mmのように小型のものでは、誘電
体ａの両端面が半田ｅによって閉塞される。When this cylindrical capacitor is soldered to the wiring part g of the printed circuit board d by the flow soldering method, for example, the dielectric a
If the outer diameter is 1 mm and the length is 2 mm, the both ends of the dielectric a are blocked by the solder e.
（考案が解決しようとする課題） 第２図示の従来のものは、プリント基板ｄの配線部ｇに
半田付けした時、半田ｅが誘電体ａの孔内に侵入して内
部電極ｂと外部電極ｃとを短絡する恐れがないように樹
脂被膜ｆを形成しているが、内部電極ｂの端縁部ｂ１と
半田ｅとが薄い樹脂被膜ｆを介して接近するので静電容
量がその部分で生じ、予定した静電容量値が増加し半田
の入り具合で静電容量値が変動するという不都合があ
る。例えば５ＰＦの低容量で樹脂の誘電率が約４のもの
では、１ＰＦ以上すなわち２０％以上も変動する。(Problems to be solved by the invention) In the conventional example shown in FIG. 2, when soldered to the wiring part g of the printed circuit board d, the solder e penetrates into the hole of the dielectric a and the internal electrode b and the external electrode Although the resin coating f is formed so that there is no risk of short-circuiting with c, since the end edge portion b 1 of the internal electrode b and the solder e come close to each other via the thin resin coating f, the capacitance is in that portion. However, there is an inconvenience that the planned electrostatic capacitance value increases and the electrostatic capacitance value changes depending on the solder penetration. For example, if the capacity of the resin is as low as 5 PF and the dielectric constant of the resin is about 4, it changes by 1 PF or more, that is, 20% or more.
本考案は、小型で且つ大容量であると共に第２図示の従
来のものの上記のような不都合のない筒形コンデンサを
得ることをその目的としたものである。The present invention has an object to obtain a cylindrical capacitor which is small in size and has a large capacity and which does not have the above-mentioned disadvantages of the conventional one shown in FIG.
（課題を解決するための手段） 本考案は、上記の目的を達成するために、筒形磁器誘電
体の内周面の一部から該誘電体の一端面を介して外周面
の端縁部まで連続して形成された内部電極と、該外周面
の他部に内部電極と絶縁して形成された外部電極とを備
え、内部電極と外部電極を各々基板の配線部に直接半田
付けする筒形コンデンサにおいて、前記内部電極が前記
誘電体の端面に形成されない側の前記誘電体の中空部の
端部を絶縁性樹脂で閉塞し、該樹脂の表面及び誘電体の
端面に外部電極と接続する導電性被膜を形成したことを
特徴とする。(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention aims to achieve the above-mentioned object from a part of an inner peripheral surface of a cylindrical ceramic dielectric body through one end surface of the dielectric body and an edge portion of an outer peripheral surface thereof. A cylinder for continuously soldering the internal electrode and the external electrode to the wiring portion of the board, respectively, and an external electrode formed to be insulated from the internal electrode on the other portion of the outer peripheral surface. Shaped capacitor, the end of the hollow portion of the dielectric on the side where the internal electrode is not formed on the end of the dielectric is closed with an insulating resin, and the surface of the resin and the end of the dielectric are connected to external electrodes. It is characterized in that a conductive film is formed.
（作用） 上記の構成によると、本案筒形コンデンサの内部電極及
び外部電極を基板の配線部に直接半田付けした場合、半
田は筒形磁器誘電体の中空部に侵入することが無く、し
たがって設定した静電容量値が増加せずあるいは変動し
ない。また筒形磁器誘電体の中空部の端部を閉塞した絶
縁性樹脂の表面及び該誘電体の端面に導電被膜を形成
し、これと外部電極を基板の配線部に半田付けするの
で、導電被膜に接続された外部電極は、基板の配線部に
確実に電気的、機械的接続が行われる。(Operation) According to the above configuration, when the internal electrode and the external electrode of the cylindrical capacitor of the present invention are directly soldered to the wiring portion of the substrate, the solder does not penetrate into the hollow portion of the cylindrical ceramic dielectric, and therefore the setting is performed. The capacitance value does not increase or change. In addition, a conductive coating is formed on the surface of the insulating resin that closes the end of the hollow portion of the cylindrical porcelain dielectric and the end surface of the dielectric, and this and the external electrode are soldered to the wiring portion of the board. The external electrode connected to is reliably electrically and mechanically connected to the wiring portion of the substrate.
（実施例） 本考案の実施例を図面につき説明する。(Embodiment) An embodiment of the present invention will be described with reference to the drawings.
第１図は本考案の一実施例を示す。FIG. 1 shows an embodiment of the present invention.
円筒形磁器誘電体１の内周面の一部と一端面と外周面の
端縁部に連続して内部電極２が形成され、該外周面の他
部に内部電極２と絶縁して外部電極３が形成され、内部
電極２が誘電体１の端面に形成されない側の前記誘電体
１の中空部の端部が絶縁性樹脂８で閉塞され、該樹脂８
の表面及び該誘電体１の端面に外周電極３に接続する導
電性被膜９がキュアタイプの導電塗料を塗布し加熱する
ことにより形成されている。そして該導電性被膜９から
外部電極３に亘る部分と内部電極２の外周面に形成され
た部分とにそれぞれ先ずニッケルをメッキし、次いで、
半田をメッキしたメッキ膜５が形成されている。An internal electrode 2 is formed continuously on a part of the inner peripheral surface of the cylindrical porcelain dielectric 1, one end surface and an end edge portion of the outer peripheral surface, and is insulated from the internal electrode 2 on the other outer peripheral surface to form an external electrode. 3 is formed, and the end of the hollow portion of the dielectric 1 on the side where the internal electrode 2 is not formed on the end face of the dielectric 1 is closed by the insulating resin 8.
A conductive coating film 9 connected to the outer peripheral electrode 3 is formed on the surface and the end surface of the dielectric 1 by applying a cure type conductive paint and heating. Then, nickel is first plated on a portion extending from the conductive coating 9 to the external electrode 3 and a portion formed on the outer peripheral surface of the internal electrode 2, and then,
A plating film 5 formed by plating solder is formed.
このコンデンサによれば、従来と同じようにしてプリン
ト基板７の配線部１０に半田付けした場合、内部電極２
が形成されない側の端部では、半田６が孔内に侵入しな
いからプリント基板７への装着時の静電容量は装着前よ
り増加しない。According to this capacitor, when soldered to the wiring portion 10 of the printed circuit board 7 in the same manner as in the conventional case, the internal electrode 2
Since the solder 6 does not penetrate into the hole at the end on the side where the solder is not formed, the capacitance when the solder 6 is mounted on the printed circuit board 7 does not increase from that before the mounting.
（考案の効果） 本考案は、上述のように構成されているから、プリント
基板の配線部への装着後に静電容量の増加し、変動する
ことがなく、外部電極をプリント基板の配線部に確実に
電気的、機械的に接続することができ、また、キャップ
を装着したものより大きな静電容量が得られると共に寸
法が小さくなり、安価である等の効果を有する。(Advantages of the Invention) Since the present invention is configured as described above, the external electrode does not change and does not fluctuate after being attached to the wiring portion of the printed circuit board, and the external electrode does not change in the wiring portion of the printed circuit board. The electrical and mechanical connection can be surely achieved, and a larger electrostatic capacity than that with the cap attached can be obtained, the size can be reduced, and the cost can be reduced.
第１図はプリント基板へ装着した本考案の一実施例の断
面図、第２図はプリント基板へ装着した従来のコンデン
サの断面図である。 １……円筒形磁器誘電体、２……内部電極 ３……外部電極、５……メッキ膜 ６……半田、７……プリント基板 ８……絶縁性樹脂、９……導電性被膜 １０……配線部FIG. 1 is a sectional view of an embodiment of the present invention mounted on a printed circuit board, and FIG. 2 is a sectional view of a conventional capacitor mounted on the printed circuit board. 1 ... Cylindrical porcelain dielectric, 2 ... Internal electrode 3 ... External electrode, 5 ... Plating film 6 ... Solder, 7 ... Printed circuit board 8 ... Insulating resin, 9 ... Conductive film 10 ... … Wiring section
フロントページの続き (72)考案者 小松 範義 東京都台東区上野１丁目２番12号 太陽誘 電株式会社内 (72)考案者 安藤 功一 東京都台東区上野１丁目２番12号 太陽誘 電株式会社内 (72)考案者 中島 英雄 東京都台東区上野１丁目２番12号 太陽誘 電株式会社内 (72)考案者 奥原 弘久 東京都台東区上野１丁目２番12号 太陽誘 電株式会社内 (56)参考文献 実開 昭53−128843（ＪＰ，Ｕ) 実開 昭53−11555（ＪＰ，Ｕ)Front page continuation (72) Inventor Noriyoshi Komatsu 1-22-1 Ueno Taito-ku, Tokyo Sun Induction Co., Ltd. (72) Inventor Koichi Ando 1-22-1 Ueno Taito-ku, Tokyo Solar Induction Incorporated (72) Inventor Hideo Nakajima 1-2-12 Ueno Taito-ku, Tokyo Taiyo Electric Co., Ltd. (72) Inventor Hirohisa Okuhara 1-2-12 Ueno Taito-ku, Tokyo Taiyo Electric Co., Ltd. (56) References Actually open 53-128843 (JP, U) Actually open 53-11555 (JP, U)
Claims (1)
体の一端面を介して外周面の端縁部まで連続して形成さ
れた内部電極と、該外周面の他部に内部電極と絶縁して
形成された外部電極とを備え、内部電極と外部電極を各
々基板の配線部に直接半田付けする筒形コンデンサにお
いて、前記内部電極が前記誘電体の端面に形成されない
側の前記誘電体の中空部の端部を絶縁性樹脂で閉塞し、
該樹脂の表面及び誘電体の端面に外部電極と接続する導
電性被膜を形成したことを特徴とする筒形コンデンサ。1. An internal electrode continuously formed from a part of an inner peripheral surface of a cylindrical ceramic dielectric material to an end portion of an outer peripheral surface through one end surface of the dielectric material, and another portion of the outer peripheral surface. A cylindrical capacitor having an internal electrode and an external electrode formed to be insulated from the internal electrode, wherein the internal electrode and the external electrode are directly soldered to the wiring portion of the substrate, respectively, on the side where the internal electrode is not formed on the end surface of the dielectric. Closing the end of the hollow part of the dielectric with an insulating resin,
A cylindrical capacitor, characterized in that a conductive film for connecting to an external electrode is formed on the surface of the resin and the end face of the dielectric.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985012128U JPH0625954Y2 (en) | 1985-02-01 | 1985-02-01 | Cylindrical capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985012128U JPH0625954Y2 (en) | 1985-02-01 | 1985-02-01 | Cylindrical capacitor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61129321U JPS61129321U (en) | 1986-08-13 |
| JPH0625954Y2 true JPH0625954Y2 (en) | 1994-07-06 |
Family
ID=30494897
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985012128U Expired - Lifetime JPH0625954Y2 (en) | 1985-02-01 | 1985-02-01 | Cylindrical capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0625954Y2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6038276Y2 (en) * | 1977-03-22 | 1985-11-15 | 株式会社村田製作所 | cylindrical capacitor |
-
1985
- 1985-02-01 JP JP1985012128U patent/JPH0625954Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61129321U (en) | 1986-08-13 |
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