JPS6360513A - Cylindrical ceramic capacitor - Google Patents
Cylindrical ceramic capacitorInfo
- Publication number
- JPS6360513A JPS6360513A JP20565486A JP20565486A JPS6360513A JP S6360513 A JPS6360513 A JP S6360513A JP 20565486 A JP20565486 A JP 20565486A JP 20565486 A JP20565486 A JP 20565486A JP S6360513 A JPS6360513 A JP S6360513A
- Authority
- JP
- Japan
- Prior art keywords
- cylindrical ceramic
- ceramic capacitor
- series resistance
- resistor
- capacitor
- 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.)
- Pending
Links
- 239000003985 ceramic capacitor Substances 0.000 title claims description 16
- 239000003990 capacitor Substances 0.000 claims description 10
- 239000000919 ceramic Substances 0.000 claims description 9
- 230000002093 peripheral effect Effects 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、等価直列抵抗を高くした筒形セラミックコ
ンデンサに関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cylindrical ceramic capacitor with a high equivalent series resistance.
例えばカーラジオ、カーステレオ等で使用されるパワー
ＩＣ等の発振防止用コンデンサにおいては、比較的高い
（例えばＩＭＨｚにおいて１〜数Ω程度の）等価直列抵
抗が必要とされている。For example, in capacitors for preventing oscillation of power ICs used in car radios, car stereos, etc., a relatively high equivalent series resistance (for example, about 1 to several ohms at IMHz) is required.
ところがセラミ・ツクコンデンサはそれ自体では等価直
列抵抗はそれほど高くないため、その対策として従来は
、■アルミニウム電解コンデンサ等のそれ自体で等価直
列抵抗の高いコンデンサを使用する、■セラミックコン
デンサに抵抗値が１〜数Ω程度の抵抗器を直列に接続す
る、等の手段が採られていた。However, ceramic capacitors do not have a very high equivalent series resistance by themselves, so conventional countermeasures have been: ■ Using a capacitor that itself has a high equivalent series resistance, such as an aluminum electrolytic capacitor, or ■ Using a ceramic capacitor with a high resistance value. Measures such as connecting resistors of 1 to several ohms in series were used.
ところが、上記■の手段においては、コスト高になる等
の問題があり、また上記■の手段においては、コンデン
サと抵抗器の２素子が必要となりコスト高になると共に
、基板への実装時の占有面積が増大する等の問題がある
。However, the above method (■) has problems such as high cost, and the above method (2) requires two elements, a capacitor and a resistor, which increases the cost and takes up less space when mounted on the board. There are problems such as an increase in area.
そこでこの発明は、一つの素子であってしかも等価直列
抵抗の高い筒形セラミンクコンデンサを提供することを
目的とする。Therefore, an object of the present invention is to provide a cylindrical ceramic capacitor which is a single element and has a high equivalent series resistance.
この発明は、筒形のセラミックユニットの内周面および
外周面に相対向するように電極を形成してそれぞれをセ
ラミックユニットの外周面端部まで引き出して成る筒形
セラミックコンデンサにおいて、前記両電極の内の少な
くとも一方を途中で分断してその分断個所を抵抗体でつ
ないでいることを特徴とする。The present invention provides a cylindrical ceramic capacitor in which electrodes are formed so as to face each other on the inner peripheral surface and the outer peripheral surface of a cylindrical ceramic unit, and each electrode is extended to an end of the outer peripheral surface of the ceramic unit. It is characterized in that at least one of the parts is divided in the middle and the divided part is connected with a resistor.
電極の分断個所をつなぐ抵抗体によって等個直列抵抗が
高められる。従って、一つの素子であってしかも等個直
列抵抗の高い筒形セラミックコンデンサが得られる。The equal series resistance is increased by the resistor that connects the divided parts of the electrodes. Therefore, it is possible to obtain a cylindrical ceramic capacitor which is a single element and has high equal series resistance.
第１図は、この発明の一実施例に係る筒形セラミックコ
ンデンサを示す断面図である。筒形、例えば円筒形のセ
ラミックユニット２の内周面および外周面にセラミック
ユニット２を挟んで相対向するように電極（例えば銀電
極）４．６を形成してそれぞれをセラミックユニット２
の外周面端部まで引き出している。両端部の電極４．６
上には、必要に応じて例えばこの例のようにキャップ端
子８ａ、８ｂがそれぞれ被せられ、更に当該キャップ端
子８ａ、８ｂには必要に応じてリード線１０ａ、ｌＱｂ
がそれぞれつながれる。また、外側には必要に応じて絶
縁外装樹脂が施される（図示省略）。FIG. 1 is a sectional view showing a cylindrical ceramic capacitor according to an embodiment of the present invention. Electrodes (for example, silver electrodes) 4 and 6 are formed on the inner and outer circumferential surfaces of a cylindrical ceramic unit 2 so as to face each other with the ceramic unit 2 in between.
It is pulled out to the edge of the outer circumferential surface. Electrodes at both ends 4.6
If necessary, cap terminals 8a and 8b are respectively placed on the cap terminals 8a and 8b as in this example, and lead wires 10a and lQb are placed on the cap terminals 8a and 8b as necessary.
are connected to each other. Further, an insulating exterior resin is applied to the outside as necessary (not shown).
上記構成は従来からの筒形セラミックコンデンサと特に
変わるものではないが、この実施例においては、前述し
た内側の電極４を例えば引き出し途中でリング状に分断
して、その分断個所１２を例えばカーボン等の抵抗体１
４でつないでいる。Although the above structure is not particularly different from that of a conventional cylindrical ceramic capacitor, in this embodiment, the inner electrode 4 described above is divided into a ring shape in the middle of being drawn out, and the divided portion 12 is made of carbon, for example. resistor 1
Connected by 4.
従ってこのコンデンサにおいては、その等価回路を第３
図に示すように、相対向する電極４．６間で静電容量Ｃ
が形成され、抵抗体１４の部分でそれに対する直列抵抗
が形成されてこれが等個直列抵抗Ｒを構成する。この場
合、等個直列抵抗Ｒの大きさは、抵抗体１４の比抵抗、
厚み、分断個所１２の幅等によって調整することができ
る。Therefore, for this capacitor, its equivalent circuit is
As shown in the figure, the capacitance C between the opposing electrodes 4.6
is formed, and a series resistance thereto is formed at the resistor 14, which constitutes an equal number of series resistances R. In this case, the magnitude of the equal series resistance R is the specific resistance of the resistor 14,
It can be adjusted by adjusting the thickness, the width of the dividing portion 12, etc.
従って上記構成によれば、一つの素子であってしかも等
個直列抵抗Ｒの高い筒形セラミックコンデンサが得られ
る。またこれによれば、従来のコンデンサと抵抗器との
２素子やアルミニウム電解コンデンサ等を用いる場合に
比べて、素子の小形化および低コスト化を図ることがで
きる。Therefore, according to the above configuration, a cylindrical ceramic capacitor which is a single element and has a high equal series resistance R can be obtained. Further, according to this, it is possible to reduce the size and cost of the element compared to the case where two elements of a conventional capacitor and a resistor, an aluminum electrolytic capacitor, etc. are used.
第２図は、この発明の他の実施例に係る筒形セラミック
コンデンサを示す断面図である。第１図の実施例との相
違点のみを説明すると、この実施例においては、前述し
た外側の電極６を例えば引き出し途中でリング状に分断
して、その分断個所１２を前述したような抵抗体１４で
つないでいる。FIG. 2 is a sectional view showing a cylindrical ceramic capacitor according to another embodiment of the invention. To explain only the difference from the embodiment shown in FIG. 1, in this embodiment, the above-mentioned outer electrode 6 is divided into a ring shape in the middle of being drawn out, and the divided part 12 is connected to the above-mentioned resistor. Connected by 14.
このコンデンサの等価回路も第３図と同様であり、相対
向する電極４．６間で静電容量Ｃが形成され、抵抗体１
４の部分でそれに対する直列抵抗が形成されるので等個
直列抵抗Ｒは高くなる。The equivalent circuit of this capacitor is also similar to that shown in FIG. 3, and a capacitance C is formed between the opposing electrodes 4.
Since a series resistance is formed in the portion 4, the equal series resistance R becomes high.
尚、必要に応じて、内側の電極４と外側の電極６の両方
に前述したようにして抵抗体１４を挿入しても良い。Note that, if necessary, the resistor 14 may be inserted into both the inner electrode 4 and the outer electrode 6 as described above.
また、セラミックユニット２は、上記例のような両端開
口のもの以外に、例えば第４図に示すような片端開口の
ものを用いても良い。Further, the ceramic unit 2 may be one that is open at one end as shown in FIG. 4, for example, instead of the one that is open at both ends as in the above example.
以上のようにこの発明によれば、一つの素子であってし
かも等個直列抵抗の高い筒形セラミックコンデンサが得
られる。従ってこれによれば、素子の小形化および低コ
スト化を図ることができる。As described above, according to the present invention, it is possible to obtain a cylindrical ceramic capacitor which is a single element and has high equal series resistance. Therefore, according to this, it is possible to reduce the size and cost of the element.
第１図は、この発明の一実施例に係る筒形セラミックコ
ンデンサを示す断面図である。第２図は、この発明の他
の実施例に係る筒形セラミックコンデンサを示す断面図
である。第３図は、第１図および第２図のコンデンサの
等価回路図である。第４図は、セラミックユニットの他
の例を示す断面図である。
２・・・セラミックユニット、４．６・・・電極、１２
・・・分断個所、１４・・、抵抗体。FIG. 1 is a sectional view showing a cylindrical ceramic capacitor according to an embodiment of the present invention. FIG. 2 is a sectional view showing a cylindrical ceramic capacitor according to another embodiment of the invention. FIG. 3 is an equivalent circuit diagram of the capacitors of FIGS. 1 and 2. FIG. 4 is a sectional view showing another example of the ceramic unit. 2... Ceramic unit, 4.6... Electrode, 12
...Divided point, 14..., resistor.
Claims (1)
に相対向するように電極を形成してそれぞれをセラミッ
クユニットの外周面端部まで引き出して成る筒形セラミ
ックコンデンサにおいて、前記両電極の内の少なくとも
一方を途中で分断してその分断個所を抵抗体でつないで
いることを特徴とする筒形セラミックコンデンサ。(1) In a cylindrical ceramic capacitor in which electrodes are formed so as to face each other on the inner circumferential surface and the outer circumferential surface of a cylindrical ceramic unit, and each electrode is extended to an end of the outer circumferential surface of the ceramic unit, the inner circumferential surface of both said electrodes is A cylindrical ceramic capacitor characterized in that at least one of the capacitors is divided in the middle and the divided portion is connected with a resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20565486A JPS6360513A (en) | 1986-09-01 | 1986-09-01 | Cylindrical ceramic capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20565486A JPS6360513A (en) | 1986-09-01 | 1986-09-01 | Cylindrical ceramic capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6360513A true JPS6360513A (en) | 1988-03-16 |
Family
ID=16510472
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20565486A Pending JPS6360513A (en) | 1986-09-01 | 1986-09-01 | Cylindrical ceramic capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6360513A (en) |
-
1986
- 1986-09-01 JP JP20565486A patent/JPS6360513A/en active Pending
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