JPH0590064A - Laminated ceramic capacitor and manufacture of the same - Google Patents
Laminated ceramic capacitor and manufacture of the sameInfo
- Publication number
- JPH0590064A JPH0590064A JP3247197A JP24719791A JPH0590064A JP H0590064 A JPH0590064 A JP H0590064A JP 3247197 A JP3247197 A JP 3247197A JP 24719791 A JP24719791 A JP 24719791A JP H0590064 A JPH0590064 A JP H0590064A
- Authority
- JP
- Japan
- Prior art keywords
- ceramic capacitor
- internal electrode
- total cross
- sectional length
- internal
- 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
Landscapes
- Ceramic Capacitors (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は内部電極の剥離を防止し
た積層セラミックコンデンサ及びその製造方法に関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated ceramic capacitor in which internal electrodes are prevented from peeling and a method for manufacturing the same.
【０００２】[0002]
【従来の技術】積層セラミックコンデンサの一例を図３
及び図４を参照して説明すると、（１）は絶縁シート、
（２）は内部電極、（３）は素子本体、（４）は外部電
極である。上記絶縁シート（１）は、例えばセラミック
を１０乃至６０μｍ厚の矩形に形成してなり、誘電体膜
として使用する。内部電極（２）は、スクリーン印刷等
により絶縁シート（１）の略全面に形成され、図４にも
示すように、一端部は絶縁シート（１）の端縁まで形成
した電極取出し部（２ａ）である。素子本体（３）は、
内部電極（２）を形成した絶縁シート（１）を、電極取
出し部（２ａ）が交互に反対側になるように複数枚積層
して、熱プレスにより結合一体化したもので、上下最外
層の絶縁シート（１）を保護層（１ａ）とする。外部電
極（４）は、素子本体（３）の両端面、即ち電極取出し
部側の端面（３ａ）（３ｂ）に導電ペーストを被着形成
したもので、複数の内部電極（２）の電極取出し部（２
ａ）と電気的に接続する。2. Description of the Related Art An example of a laminated ceramic capacitor is shown in FIG.
And, referring to FIG. 4, (1) is an insulating sheet,
(2) is an internal electrode, (3) is an element body, and (4) is an external electrode. The insulating sheet (1) is made of, for example, ceramic having a rectangular shape with a thickness of 10 to 60 μm and is used as a dielectric film. The internal electrodes (2) are formed on substantially the entire surface of the insulating sheet (1) by screen printing or the like, and as shown in FIG. 4, one end is formed up to the edge of the insulating sheet (1) and the electrode lead-out portion (2a) is formed. ). The element body (3) is
A plurality of insulating sheets (1) on which the internal electrodes (2) are formed are laminated so that the electrode lead-out portions (2a) are alternately on opposite sides, and they are bonded and integrated by hot pressing. The insulating sheet (1) is used as the protective layer (1a). The external electrodes (4) are formed by depositing a conductive paste on both end surfaces of the element body (3), that is, the end surfaces (3a) (3b) on the electrode extraction portion side, and extracting the plurality of internal electrodes (2). Department (2
Electrically connect with a).
【０００３】[0003]
【発明が解決しようとする課題】本発明が解決しようと
する課題は、小型高容量化を実現するため絶縁シート
（１）を薄膜多層にすると、内部電極（２）が層剥離し
易くなり、通常より苛酷な条件で評価する耐湿負荷試験
等で不良発生率が増加し、信頼性が低下する点である。The problem to be solved by the present invention is that if the insulating sheet (1) is formed into a thin film multi-layer in order to realize a small size and high capacity, the internal electrodes (2) are easily delaminated, This is a point that the failure occurrence rate increases in a moisture resistance load test or the like that is evaluated under more severe conditions than usual, and the reliability decreases.
【０００４】[0004]
【課題を解決するための手段】本発明は、表面に内部電
極を形成した絶縁シートを複数枚積層し、上記内部電極
の電極取出し部を絶縁シートの両端面より交互に露出さ
せた素子本体と、上記素子本体の各端部を被覆して内部
電極の各端面に電気的接続する一対の外部電極とを具備
してなる積層セラミックコンデンサにおいて、上記各内
部電極に層剥離防止用の複数のスポット状くりぬき部を
設け、内部電極を挟む上下各絶縁シートをくりぬき部を
介して接続一体化したもので、くりぬき部の断面長さ総
和を断面全長の１０〜３０％に設定したことを特徴とす
る。又、その製造方法は内部電極ペーストを薄く塗布し
てくりぬき部の断面長さ総和を断面全長の１０〜３０％
に設定すること、又は内部電極ペースト中に誘電体粉末
を金属分の５〜１０％混合してくりぬき部の断面長さ総
和を断面全長の１０〜３０％に設定することを特徴とす
る。The present invention relates to an element body in which a plurality of insulating sheets each having an internal electrode formed on the surface thereof are laminated and the electrode lead-out portions of the internal electrodes are alternately exposed from both end surfaces of the insulating sheet. A multilayer ceramic capacitor comprising a pair of external electrodes covering each end of the element body and electrically connected to each end face of an internal electrode, wherein a plurality of spots for preventing delamination are provided on each internal electrode. A shape hollow portion is provided, and upper and lower insulating sheets sandwiching the internal electrode are connected and integrated through the hollow portion, and the total cross-sectional length of the hollow portion is set to 10 to 30% of the total cross-sectional length. .. In addition, the manufacturing method is such that the internal electrode paste is thinly applied and the total cross-sectional length of the hollow portion is 10 to 30% of the total cross-sectional length.
Or the dielectric powder is mixed in the internal electrode paste in an amount of 5 to 10% of the metal content, and the total cross-sectional length of the hollowed portion is set to 10 to 30% of the total cross-sectional length.
【０００５】[0005]
【作用】上記技術的手段によれば、各内部電極に複数の
スポット状くりぬき部が、上下各絶縁シートを接続一体
化する役割を果たして内部電極の層剥離を防止する。According to the above-mentioned technical means, a plurality of spot-shaped hollowed portions play a role of connecting and integrating the upper and lower insulating sheets to each internal electrode to prevent the layer peeling of the internal electrode.
【０００６】[0006]
【実施例】本発明に係る積層セラミックコンデンサ及び
その製造方法の実施例を図１及び図２を参照して以下に
説明する。図１及び図２に示す部分と同一部分には同一
参照符号を付してその説明を省略する。相違する点は内
部電極（５）の構造で、各内部電極（５）に例えば、複
数のスポット状くりぬき部（５ａ）を設け、且つ、くり
ぬき部（５ａ）の断面長さ（Ａｎ）の総和（ΣＡｎ）を
断面全長（Ａｏ）の１０〜３０％になるように設定す
る。尚、断面長さ（Ａｎ）は、くりぬき部（５ａ）が、
不定形の透孔であり、最大径と呼ぶと、不適切な場合が
あるため、普遍性を持たせるために、呼称するものであ
る。そうすると、内部電極（５）を挟む上下各絶縁シー
ト（１）がくりぬき部（５ａ）を介して接続一体化さ
れ、内部電極（５）の層剥離を防止する。測定によれ
ば、表１に示すように、不良品は発生しない。Embodiments of a monolithic ceramic capacitor and a method of manufacturing the same according to the present invention will be described below with reference to FIGS. The same parts as those shown in FIGS. 1 and 2 are designated by the same reference numerals, and the description thereof will be omitted. The difference lies in the structure of the internal electrode (5). For example, each internal electrode (5) is provided with a plurality of spot-shaped hollow portions (5a), and the total cross-sectional length (An) of the hollow portions (5a). (ΣAn) is set to be 10 to 30% of the total cross section length (Ao). The cross-section length (An) is
Since it is an irregular through-hole, and it is sometimes inappropriate to call it the maximum diameter, it is called to have universality. Then, the upper and lower insulating sheets (1) sandwiching the internal electrode (5) are connected and integrated through the hollow portion (5a), and the layer peeling of the internal electrode (5) is prevented. According to the measurement, as shown in Table 1, no defective product is generated.
【表１】 又、表２に示すように、層剥離は発生しておらず、電気
的特性も前記１０〜３０％の範囲内では良好である。[Table 1] Further, as shown in Table 2, delamination did not occur, and the electrical characteristics were good in the range of 10 to 30%.
【表２】 くりぬき部（５ａ）の断面長さ（Ａｎ）の総和（ΣＡ
ｎ）が３０％を越えると、内部電極がランド状に分割さ
れ、内部電極として機能しなくなる為に静電容量が大幅
に低下する、一方、くりぬき部（５ａ）の断面長さ（Ａ
ｎ）の総和（ΣＡｎ）が１０％未満では、本発明の効果
が十分得られない。[Table 2] Sum of cross-section lengths (An) of the hollow portion (5a) (ΣA
When n) exceeds 30%, the internal electrode is divided into lands and does not function as an internal electrode, resulting in a large decrease in capacitance. On the other hand, the cross-sectional length (A) of the hollow portion (5a)
If the total sum (ΣAn) of n) is less than 10%, the effect of the present invention cannot be sufficiently obtained.
【０００７】次に、本発明に係る積層セラミックコンデ
ンサの製造方法を説明する。まず内部電極（５）の形成
に際し、内部電極ペーストを薄く塗布しておく。例えば
焼結後１〜２μｍ厚となるように塗布して、くりぬき部
（５ａ）の断面長さ（Ａｎ）の総和（ΣＡｎ）を断面全
長（Ａｏ）の１０〜３０％になるように設定する。そう
すると、内部電極ペーストは樹脂を主成分とした有機バ
インダ中に金属（例えば銀パラジウム）粉末を分散させ
たものであるため、セラミックを約９００〜１０００°
Ｃで焼結させる時にまず約３００°Ｃでバインダが分散
飛散し、更に高温（焼結温度近く）になると、金属粉末
が半溶融状態になって互いにくっついて収縮して来る。
そこで、ペースト塗布面が自然に切れて来てくりぬき部
（５ａ）を形成する。Next, a method of manufacturing the monolithic ceramic capacitor according to the present invention will be described. First, when forming the internal electrodes (5), the internal electrode paste is applied thinly. For example, it is applied so as to have a thickness of 1 to 2 μm after sintering, and the total (ΣAn) of the cross-sectional length (An) of the hollow portion (5a) is set to be 10 to 30% of the total cross-sectional length (Ao). . Then, the internal electrode paste is a dispersion of metal (for example, silver-palladium) powder in an organic binder containing a resin as a main component, so that the ceramic is about 900 to 1000 °.
At the time of sintering at C, the binder disperses and scatters at about 300 ° C., and when the temperature becomes higher (near the sintering temperature), the metal powders become a semi-molten state and stick to each other and shrink.
Therefore, the paste application surface naturally cuts to form a hollow portion (5a).
【０００８】又、本発明に係る積層セラミックコンデン
サの他の製造方法を特公昭６３−２３６４６号公報を応
用して説明する。この場合、内部電極ペースト中にセラ
ミック等の誘電体粉末をパラジウム、銀パラジウム等の
金属分の５〜１０％混合して、くりぬき部（５ａ）の断
面長さ（Ａｎ）の総和（ΣＡｎ）を断面全長（Ａｏ）の
１０〜３０％になるように設定する。そうすることによ
り金属粉末同士、又、セラミック粉末同士がそれぞれ焼
結するため、内部電極金属部分が自然に切れて来てくり
ぬき部（５ａ）を形成する。Another method of manufacturing a monolithic ceramic capacitor according to the present invention will be described by applying Japanese Patent Publication No. 63-23646. In this case, a dielectric powder such as ceramic is mixed in the internal electrode paste in an amount of 5 to 10% of a metal content such as palladium or silver-palladium, and the total cross-sectional length (An) of the hollowed portion (5a) (ΣAn) is obtained. It is set so as to be 10 to 30% of the total cross-section length (Ao). By doing so, the metal powders and the ceramic powders sinter with each other, so that the metal parts of the internal electrodes are naturally cut to form the hollow portion (5a).
【０００９】[0009]
【発明の効果】本発明によれば、積層セラミックコンデ
ンサの内部電極の層剥離の発生を防止して信頼性が向上
する。According to the present invention, delamination of internal electrodes of a laminated ceramic capacitor is prevented and reliability is improved.
【図１】本発明に係る積層セラミックコンデンサの実施
例を示す断面図である。FIG. 1 is a sectional view showing an embodiment of a monolithic ceramic capacitor according to the present invention.
【図２】本発明に係る積層セラミックコンデンサの製造
方法の実施例を示す斜視図である。FIG. 2 is a perspective view showing an embodiment of a method for manufacturing a monolithic ceramic capacitor according to the present invention.
【図３】従来の積層セラミックコンデンサの一例を示す
断面図である。FIG. 3 is a sectional view showing an example of a conventional monolithic ceramic capacitor.
【図４】従来の積層セラミックコンデンサの製造方法の
一例を示す斜視図である。FIG. 4 is a perspective view showing an example of a conventional method for manufacturing a monolithic ceramic capacitor.
１ 絶縁シート ３ 素子本体 ４ 外部電極 ５ 内部電極 ５ａ くりぬき部 1 Insulating sheet 3 Element body 4 External electrode 5 Internal electrode 5a Hollowed part
Claims (4)
複数枚積層し、上記内部電極の電極取出し部を絶縁シー
トの両端面より交互に露出させた素子本体と、上記素子
本体の各端部を被覆して内部電極の各端面に電気的接続
する一対の外部電極とを具備してなる積層セラミックコ
ンデンサにおいて、 上記各内部電極に層剥離防止用の複数のくりぬき部を設
け、内部電極を挟む上下各絶縁シートをくりぬき部を介
して接続一体化したことを特徴とする積層セラミックコ
ンデンサ。1. An element body in which a plurality of insulating sheets each having an internal electrode formed on the surface thereof are laminated, and the electrode lead-out portions of the internal electrode are alternately exposed from both end surfaces of the insulating sheet, and each end portion of the element body. A multilayer ceramic capacitor having a pair of external electrodes that cover each of the internal electrodes and are electrically connected to each end face of the internal electrodes, wherein the internal electrodes are provided with a plurality of hollow portions for preventing delamination A monolithic ceramic capacitor in which upper and lower insulating sheets are connected and integrated through a hollow portion.
トの断面全長の１０〜３０％に設定したことを特徴とす
る請求項１記載の積層セラミックコンデンサ。2. The monolithic ceramic capacitor according to claim 1, wherein the total cross-sectional length of the hollowed portion is set to 10 to 30% of the total cross-sectional length of the insulating sheet.
よって、くりぬき部の断面長さの総和を、断面全長の１
０〜３０％に設定することを特徴とする請求項１記載の
積層セラミックコンデンサの製造方法。3. The internal electrode paste is applied thinly so that the total cross-sectional length of the hollowed portion is 1
The method for manufacturing a monolithic ceramic capacitor according to claim 1, wherein the content is set to 0 to 30%.
０％混合した誘電体粉末を塗布して、くりぬき部の断面
長さの総和を断面全長の１０〜３０％に設定することを
特徴とする請求項１記載の積層セラミックコンデンサの
製造方法。4. The internal electrode paste contains a metal content of 5 to 1
2. The method for producing a monolithic ceramic capacitor according to claim 1, wherein the dielectric powder mixed with 0% is applied to set the total cross-sectional length of the hollow portion to 10 to 30% of the total cross-sectional length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3247197A JPH0590064A (en) | 1991-09-26 | 1991-09-26 | Laminated ceramic capacitor and manufacture of the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3247197A JPH0590064A (en) | 1991-09-26 | 1991-09-26 | Laminated ceramic capacitor and manufacture of the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0590064A true JPH0590064A (en) | 1993-04-09 |
Family
ID=17159895
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3247197A Pending JPH0590064A (en) | 1991-09-26 | 1991-09-26 | Laminated ceramic capacitor and manufacture of the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0590064A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1107265A2 (en) * | 1999-12-03 | 2001-06-13 | TDK Corporation | Semiconductor electronic part |
| US6979486B2 (en) * | 1999-07-21 | 2005-12-27 | Taiyo Yuden Co., Ltd. | Multilayer ceramic capacitor |
| JP2020077798A (en) * | 2018-11-08 | 2020-05-21 | 太陽誘電株式会社 | Ceramic electronic component and manufacturing method of the same |
-
1991
- 1991-09-26 JP JP3247197A patent/JPH0590064A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6979486B2 (en) * | 1999-07-21 | 2005-12-27 | Taiyo Yuden Co., Ltd. | Multilayer ceramic capacitor |
| EP1107265A2 (en) * | 1999-12-03 | 2001-06-13 | TDK Corporation | Semiconductor electronic part |
| EP1107265A3 (en) * | 1999-12-03 | 2006-03-29 | TDK Corporation | Semiconductor electronic part |
| JP2020077798A (en) * | 2018-11-08 | 2020-05-21 | 太陽誘電株式会社 | Ceramic electronic component and manufacturing method of the same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 19990601 |