JPH0423309A - Laminated ceramic capacitor - Google Patents
Laminated ceramic capacitorInfo
- Publication number
- JPH0423309A JPH0423309A JP2123567A JP12356790A JPH0423309A JP H0423309 A JPH0423309 A JP H0423309A JP 2123567 A JP2123567 A JP 2123567A JP 12356790 A JP12356790 A JP 12356790A JP H0423309 A JPH0423309 A JP H0423309A
- Authority
- JP
- Japan
- Prior art keywords
- ceramic
- dielectric
- paste
- powder
- copper
- 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 10
- 239000000919 ceramic Substances 0.000 claims abstract description 29
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000000843 powder Substances 0.000 claims abstract description 20
- 229910052802 copper Inorganic materials 0.000 claims abstract description 17
- 239000010949 copper Substances 0.000 claims abstract description 17
- 238000004898 kneading Methods 0.000 claims description 4
- 238000010030 laminating Methods 0.000 claims 1
- 239000003960 organic solvent Substances 0.000 claims 1
- 230000032798 delamination Effects 0.000 abstract description 8
- 230000007547 defect Effects 0.000 abstract description 3
- 239000002904 solvent Substances 0.000 abstract description 3
- 229910002113 barium titanate Inorganic materials 0.000 abstract description 2
- 239000011248 coating agent Substances 0.000 abstract description 2
- 238000000576 coating method Methods 0.000 abstract description 2
- 239000002245 particle Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 8
- 238000010304 firing Methods 0.000 description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
- 239000004332 silver Substances 0.000 description 3
- 229910001316 Ag alloy Inorganic materials 0.000 description 2
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- 229910001252 Pd alloy Inorganic materials 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 239000003989 dielectric material Substances 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 239000002003 electrode paste Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 229940023462 paste product Drugs 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は高周波特性の優れた積層セラミックコンデンサ
に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a multilayer ceramic capacitor with excellent high frequency characteristics.
従来の技術
従来の積層セラミックコンデンサは、セラミックグリー
ンシート２の表面に内部電極３を印刷塗布して誘電体シ
ート４となし、この誘電体シート４を複数枚重ね合わせ
て積層し、熱圧着を行い、切断加工して単体のセラミッ
クコンデンサ素子５を形成し、所定温度で焼成した後、
コンテ〕／す素子５０両端部に外部電極６を形成してコ
ンデンサを製作している。Conventional technology A conventional multilayer ceramic capacitor is manufactured by printing and coating internal electrodes 3 on the surface of a ceramic green sheet 2 to form a dielectric sheet 4, stacking a plurality of dielectric sheets 4, and bonding them by thermocompression. After cutting to form a single ceramic capacitor element 5 and firing at a predetermined temperature,
A capacitor is manufactured by forming external electrodes 6 on both ends of a condenser element 50.
この内部電極３を形成するための印刷用インク状ペース
トは、ニッケル粉や銀／パラジウム合金粉にガラスフリ
ットを添加したものが用いられているが、高周波特性を
高めるために、銅の粉末、有機ビヒクル及び溶剤とから
なるペーストを用いることがある。しかし銅の融点が１
０８３℃であるため、この温度以下で焼成するセラミッ
ク誘電体粉にしか適用することができなかった。The ink-like paste for printing used to form the internal electrodes 3 is made of nickel powder or silver/palladium alloy powder with glass frit added. A paste consisting of a vehicle and a solvent may be used. However, the melting point of copper is 1
Since the temperature is 083°C, it could only be applied to ceramic dielectric powders that are fired at temperatures below this temperature.
発明が解決しようとする課題
従来、内部電極のペーストとして銅粉ペーストを使用す
る場合は、銅の融点以上の焼成温度が必要なセラミック
誘電体粉に適用すると、焼成中に銅粉が溶融して膨部し
、積層するセラミック誘電体層間を剥離させる力を生じ
、層間剥離（デラミネーション）不良を発生する要因と
なっていた。Problems to be Solved by the Invention Conventionally, when copper powder paste is used as a paste for internal electrodes, when applied to ceramic dielectric powder, which requires a firing temperature higher than the melting point of copper, the copper powder melts during firing. This bulges and generates a force that causes the laminated ceramic dielectric layers to peel off, causing delamination defects.
課題を解決するための手段
本発明は１２００℃までの焼成温度を有するセラミック
誘電体に適用でき、かつ高周波特性に優れた積層セラミ
ックコンデンサ用の内部電極に使用するペーストを提供
する。Means for Solving the Problems The present invention provides a paste for use in internal electrodes for multilayer ceramic capacitors that is applicable to ceramic dielectrics having a firing temperature of up to 1200° C. and has excellent high frequency characteristics.
本発明の積層セラミックコンデンサは、チタン酸系バリ
ウム系のセラミック誘電体層上に内部電極を形成する誘
電体シートにおいて、この内部電極として銅層を被覆し
た誘電体セラミック粉、有機ビヒクル及び有機溶剤を混
練して製作した印刷用インク状ペーストを用いることを
特徴とする。The multilayer ceramic capacitor of the present invention has a dielectric sheet that forms internal electrodes on a barium titanate-based ceramic dielectric layer. It is characterized by using an ink-like paste for printing produced by kneading.
作用
従来銅粉を用いていたものに対し、銅層を被覆した誘電
セラミック粉を使用することにより、銅の相対的体積が
減少するので、溶融膨張量を抑えることができ、デラミ
ネーション不良の発生を防止することができる。銅の総
量が減少しても、高周波電流は表面層に集中して流れる
性質を有しているので、高周波領域におけるインピーダ
ンスを小さく保つことができる。Function: Compared to conventional copper powder, using dielectric ceramic powder coated with a copper layer reduces the relative volume of copper, which reduces the amount of melt expansion and reduces the occurrence of delamination defects. can be prevented. Even if the total amount of copper decreases, the impedance in the high frequency region can be kept low because the high frequency current has the property of flowing concentratedly in the surface layer.
実施例 本発明の詳細な説明する。Example The present invention will be described in detail.
セラミック誘電体粉として３ａＴｉ０３９５％以上から
なるセラミックを用い厚さ３０μ汎のセラミック誘電体
１２を製作する。このセラミック誘電体シート１２の表
面にペーストを印刷塗布して内部電極１３を形成した誘
電体シート１４をうる。このペーストとして、平均粒径
０．１μｍの上記のセラミック誘電体粉１５を用い、平
均的０゜０５μｍの銅層１６を被覆した銅層被覆セラミ
ック粉１７を５２重量％と有機ビヒクル４８重量％とを
良く混練した後、溶剤を添加して粘度１２０ボイスに調
整したペースト１８を内部電極１３として用いる。A ceramic dielectric material 12 having a thickness of 30 .mu.m is manufactured using a ceramic made of 3aTi0395% or more as the ceramic dielectric powder. A paste is printed and coated on the surface of this ceramic dielectric sheet 12 to obtain a dielectric sheet 14 on which internal electrodes 13 are formed. As this paste, the above-mentioned ceramic dielectric powder 15 with an average particle size of 0.1 μm was used, 52% by weight of copper layer-coated ceramic powder 17 coated with a copper layer 16 of 0.05 μm in average, and 48% by weight of an organic vehicle. After thoroughly kneading the paste 18, a solvent was added to adjust the viscosity to 120 voices, and the paste 18 was used as the internal electrode 13.
この誘電体シート１４を複数枚積層して定格５０Ｖ、０
．１μＦの積層セラミックコンデンサ素子を作製し、３
００℃で脱脂後焼成温度１１５０”Ｃ，１２００℃、１
２５０℃の３種類のものを作った。A plurality of these dielectric sheets 14 are laminated to give a rating of 50V and 0.
．． A 1 μF multilayer ceramic capacitor element was fabricated, and 3
After degreasing at 00℃, firing temperature 1150"C, 1200℃, 1
Three types were made at 250°C.
１２５０℃で焼成したものにはデラミネーションが一部
に発生するものがあったが、１１５０℃及び１２００℃
で焼成したものにはデラミネーションの発生は認められ
なかった。Some of the products fired at 1250°C had delamination, but those fired at 1150°C and 1200°C
No delamination was observed in the products fired.
同時に、ニッケル粉及び銀／パラジウム合金粉ペースト
で内部電極を形成した同一定格の積層セラミックコンデ
ンサのインピーダンスにつき比較してみた。銀／パラジ
ウムを用いたものはインピーダンスを１００としたとき
、５００ＭＨｚではニッケル粉ペースト品は９０、本発
明品の銅被覆のものは８５と最も低い値が得られた。At the same time, we compared the impedance of multilayer ceramic capacitors of the same rating whose internal electrodes were formed using nickel powder and silver/palladium alloy powder paste. When the impedance of the product using silver/palladium was set to 100, the lowest value was obtained at 500 MHz, 90 for the nickel powder paste product and 85 for the copper-coated product of the present invention.
発明の効果
従来の銅粉とセラミック粉体を有機ビヒクル中に混在分
散させたものは、銅粉とセラミック誘電体粉とで比重及
び表面性状が異なるので、銅粉同志又はセラミック粉同
志が偏析凝集してしまうので、銅粉が溶融したとき銅の
厚い層が形成され、膨張作用が１箇所に集中してデラミ
ネーション発生及び局所的な断線手釣につながっていた
。Effects of the Invention In conventional products in which copper powder and ceramic powder are mixed and dispersed in an organic vehicle, the specific gravity and surface properties of the copper powder and ceramic dielectric powder are different, so the copper powder or ceramic powder tends to segregate and agglomerate together. As a result, when the copper powder melts, a thick layer of copper is formed, and the expansion action is concentrated in one location, leading to delamination and local wire breakage.
本発明は銅層を被覆したセラミック粉体を有機ビヒクル
中で混練したペーストを内部電極として用いることによ
り、デラミネーションの発生がなくなり、周知の銀／パ
ラジウムペースト品と対比して、５００ＭＨｚの高周波
領域でインピーダンスだ８５％低いものが得られ、１２
００℃までの焼成温度を有する誘電体粉に適用できるも
のを提供することができた。The present invention eliminates the occurrence of delamination by using a paste made by kneading ceramic powder coated with a copper layer in an organic vehicle as an internal electrode. 85% lower impedance was obtained, 12
It was possible to provide a product that can be applied to dielectric powder having a firing temperature of up to 00°C.
第１図は本発明の断面斜視図、第２図は内部電極用ペー
ストの断面図、第３図は同焼成後の断面図、第４図は従
来の断面図である。
１２・・・セラミック誘電体、 １３・・・内部電極、
１４・・・誘電体シート、 １５・・・セラミック粉、
１６・・・銅層、 １７・・・銅被覆セラミック粉１８
・・・ペースト。
特許出願人 日立コンデンサ株式会社
条１（２）
奪Ｚ・圓
争４図FIG. 1 is a cross-sectional perspective view of the present invention, FIG. 2 is a cross-sectional view of the internal electrode paste, FIG. 3 is a cross-sectional view after firing, and FIG. 4 is a conventional cross-sectional view. 12... Ceramic dielectric, 13... Internal electrode,
14... Dielectric sheet, 15... Ceramic powder,
16...Copper layer, 17...Copper coated ceramic powder 18
···paste. Patent Applicant: Hitachi Capacitor Co., Ltd. Article 1 (2) Uzumaki Z/Enterprise Figure 4
Claims (1)
体シートを用い、この誘電体シートを複数枚積層してな
る積層セラミックコンデンサにおいて、この内部電極と
して銅層を被覆した誘電体セラミック粉、有機ビヒクル
及び有機溶剤を混練して作製した印刷用インク状ペース
トを用いることを特徴とする積層セラミックコンデンサ
。(1) In a multilayer ceramic capacitor formed by laminating a plurality of dielectric sheets using a dielectric sheet forming an internal electrode on a ceramic dielectric layer, a dielectric ceramic powder coated with a copper layer as the internal electrode, A multilayer ceramic capacitor characterized by using a printing ink-like paste prepared by kneading an organic vehicle and an organic solvent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2123567A JPH0423309A (en) | 1990-05-14 | 1990-05-14 | Laminated ceramic capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2123567A JPH0423309A (en) | 1990-05-14 | 1990-05-14 | Laminated ceramic capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0423309A true JPH0423309A (en) | 1992-01-27 |
Family
ID=14863778
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2123567A Pending JPH0423309A (en) | 1990-05-14 | 1990-05-14 | Laminated ceramic capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0423309A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7131174B2 (en) * | 2002-03-07 | 2006-11-07 | Tdk Corporation | Ceramic electronic device and method of production of same |
| CN100466120C (en) * | 1999-07-21 | 2009-03-04 | 太阳诱电株式会社 | Stacking ceramic capacitor |
| CN103474237A (en) * | 2012-06-05 | 2013-12-25 | 三星电机株式会社 | Multilayered ceramic component |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5868918A (en) * | 1981-10-20 | 1983-04-25 | 三菱鉱業セメント株式会社 | Electronic part with electrode layer and method of producing same |
-
1990
- 1990-05-14 JP JP2123567A patent/JPH0423309A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5868918A (en) * | 1981-10-20 | 1983-04-25 | 三菱鉱業セメント株式会社 | Electronic part with electrode layer and method of producing same |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100466120C (en) * | 1999-07-21 | 2009-03-04 | 太阳诱电株式会社 | Stacking ceramic capacitor |
| US7131174B2 (en) * | 2002-03-07 | 2006-11-07 | Tdk Corporation | Ceramic electronic device and method of production of same |
| CN103474237A (en) * | 2012-06-05 | 2013-12-25 | 三星电机株式会社 | Multilayered ceramic component |
| US9183987B2 (en) | 2012-06-05 | 2015-11-10 | Samsung Electro-Mechanics Co., Ltd. | Multilayered ceramic component |
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