JPS6323648B2 - - Google Patents
Info
- Publication number
- JPS6323648B2 JPS6323648B2 JP54082249A JP8224979A JPS6323648B2 JP S6323648 B2 JPS6323648 B2 JP S6323648B2 JP 54082249 A JP54082249 A JP 54082249A JP 8224979 A JP8224979 A JP 8224979A JP S6323648 B2 JPS6323648 B2 JP S6323648B2
- Authority
- JP
- Japan
- Prior art keywords
- internal electrode
- dielectric
- parts
- electrode material
- aluminum metal
- 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
Links
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 13
- 239000007772 electrode material Substances 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 9
- 239000003985 ceramic capacitor Substances 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- 239000003990 capacitor Substances 0.000 claims description 6
- 238000010304 firing Methods 0.000 claims description 4
- 229910010293 ceramic material Inorganic materials 0.000 claims 2
- 238000010030 laminating Methods 0.000 claims 2
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 10
- 239000000843 powder Substances 0.000 description 8
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 6
- 238000002844 melting Methods 0.000 description 5
- 229910052763 palladium Inorganic materials 0.000 description 5
- 239000000919 ceramic Substances 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- FPZWZCWUIYYYBU-UHFFFAOYSA-N 2-(2-ethoxyethoxy)ethyl acetate Chemical compound CCOCCOCCOC(C)=O FPZWZCWUIYYYBU-UHFFFAOYSA-N 0.000 description 3
- 239000001856 Ethyl cellulose Substances 0.000 description 3
- ZZSNKZQZMQGXPY-UHFFFAOYSA-N Ethyl cellulose Chemical compound CCOCC1OC(OC)C(OCC)C(OCC)C1OC1C(O)C(O)C(OC)C(CO)O1 ZZSNKZQZMQGXPY-UHFFFAOYSA-N 0.000 description 3
- 229920001249 ethyl cellulose Polymers 0.000 description 3
- 235000019325 ethyl cellulose Nutrition 0.000 description 3
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 3
- 229910052697 platinum Inorganic materials 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- DJOYTAUERRJRAT-UHFFFAOYSA-N 2-(n-methyl-4-nitroanilino)acetonitrile Chemical compound N#CCN(C)C1=CC=C([N+]([O-])=O)C=C1 DJOYTAUERRJRAT-UHFFFAOYSA-N 0.000 description 1
- 229910001316 Ag alloy Inorganic materials 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- IZJSTXINDUKPRP-UHFFFAOYSA-N aluminum lead Chemical compound [Al].[Pb] IZJSTXINDUKPRP-UHFFFAOYSA-N 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 description 1
- 229910002113 barium titanate Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910000416 bismuth oxide Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- TYIXMATWDRGMPF-UHFFFAOYSA-N dibismuth;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Bi+3].[Bi+3] TYIXMATWDRGMPF-UHFFFAOYSA-N 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- SWELZOZIOHGSPA-UHFFFAOYSA-N palladium silver Chemical compound [Pd].[Ag] SWELZOZIOHGSPA-UHFFFAOYSA-N 0.000 description 1
- -1 silver metals Chemical class 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
Landscapes
- Ceramic Capacitors (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
- Conductive Materials (AREA)
Description
【発明の詳細な説明】
本発明は新規な内部電極材料を用いたことを特
徴とする積層セラミツクコンデンサに関するもの
である。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a multilayer ceramic capacitor characterized by using a novel internal electrode material.
従来、積層セラミツクコンデンサはその内部電
極材料として白金、パラジウムなどの高価な貴金
属を用いていたため、積層セラミツクコンデンサ
のコストが非常に高価となる欠点を有していた。 Conventionally, multilayer ceramic capacitors have used expensive noble metals such as platinum and palladium as their internal electrode materials, which has resulted in the disadvantage that the cost of multilayer ceramic capacitors is extremely high.
すなわち、積層コンデンサの内部電極は誘電体
を1200〜1300℃の高温で焼成する必要があるた
め、このような高温で誘電体を反応せず、また内
部電極金属の融点が誘電体の焼結温度よりも高く
する必要があると孝えられていたために高価な白
金、パラジウムを使用せざるを得なかつた。 In other words, the internal electrodes of multilayer capacitors require the dielectric to be fired at a high temperature of 1,200 to 1,300°C, so the dielectric does not react at such high temperatures, and the melting point of the internal electrode metal is close to the dielectric's sintering temperature. Because it was mandated that it needed to be higher than the standard, expensive platinum and palladium had to be used.
一方誘電体の焼結温度を1000℃まで下げること
により安価なパラジウム−銀合金を内部電極とし
て用いる方法も考えられてはいるが、しかし0.02
〜0.05mmという非常に薄い誘電体膜厚では銀のマ
イグレーシヨンによるコンデンサの絶縁抵抗の劣
化が生じるという致命的な欠点を有する。 On the other hand, a method of lowering the sintering temperature of the dielectric material to 1000°C and using an inexpensive palladium-silver alloy as the internal electrode has been considered;
A very thin dielectric film thickness of ~0.05 mm has a fatal drawback in that the insulation resistance of the capacitor deteriorates due to silver migration.
本発明は上述のような欠点を改良し、安価な積
層コンデンサを提供しようとするものである。 The present invention aims to improve the above-mentioned drawbacks and provide an inexpensive multilayer capacitor.
本発明者等は積層コンデンサの電極材料として
種々金属材料を変えて実験を繰返した結果、内
部電極材料としては誘電体の焼成温度以上の融点
をもつことが必ずしも必要ではないこと、通常
金属は融点以上では分子凝集力により金属膜は形
成されず玉状となつてしまうが、アルミニウム金
属を用いると融点の670℃以上の温度においても
アルミニウム表面に薄い酸化被膜が形成されて凝
集作用は生じないこと、低温焼成セラミツクの
焼結温度領域においてもアルミニウム金属の融点
よりも300〜400℃程高温であるにも拘らず、アル
ミニウム金属表面の酸化被膜の存在のためか、誘
電体セラミツクとの相互反応、相互拡散は生じな
いことを見出した。 As a result of repeated experiments using various metal materials as electrode materials for multilayer capacitors, the inventors of the present invention found that it is not necessarily necessary for the internal electrode material to have a melting point higher than the firing temperature of the dielectric; In the above case, a metal film is not formed due to molecular cohesive force and becomes bead-shaped, but when aluminum metal is used, a thin oxide film is formed on the aluminum surface even at temperatures above the melting point of 670°C, and no agglomeration effect occurs. Although the sintering temperature range of low-temperature fired ceramics is about 300 to 400 degrees Celsius higher than the melting point of aluminum metal, there is no interaction with the dielectric ceramic, perhaps due to the presence of an oxide film on the aluminum metal surface. It was found that no mutual diffusion occurred.
以下、本発明を実施例についてさらに詳細に説
明する。 Hereinafter, the present invention will be described in more detail with reference to Examples.
実施例 １
チタン酸バリウム 90モル％
ジルコン酸カルシウム ２モル％
酸化ジルコニウム ３モル％
酸化ビスマス ２モル％
酸化チタン ３モル％
の組成物に低融点ガラスフリツト2.0重量％添加
し、30μｍの誘電体シート（以下グリーンシート
という）を形成した。Example 1 To a composition of 90 mol% barium titanate, 2 mol% calcium zirconate, 3 mol% zirconium oxide, 2 mol% bismuth oxide, and 3 mol% titanium oxide, 2.0% by weight of low-melting glass frit was added, and a 30 μm dielectric sheet (hereinafter referred to as A green sheet was formed.
このグリーンシートに
アルミニウム金属粉末 100部
エチルセルロース 8.6部
カルビトールアセテート 60部
の組成物のペーストを内部電極として印刷し、シ
ートを交互に積層した後所定寸法にカツトし、
900℃で30分焼成した後電気的特性を測定した。 A paste of a composition of 100 parts of aluminum metal powder, 8.6 parts of ethyl cellulose, and 60 parts of carbitol acetate was printed on this green sheet as an internal electrode, and the sheets were laminated alternately and then cut to a predetermined size.
The electrical properties were measured after baking at 900°C for 30 minutes.
容 量 12500PF
見掛誘電率 850
誘電損失 5.6％
実施例 ２
実施例１と同様のグリーンシートに
アルミニウム金属粉末 90部
鉛金属粉末 10部
エチルセルロース 8.6部
カルビトールアセテート 60部
の組成物のペーストを内部電極として印刷し、シ
ートを交互に積層した後所定寸法にカツトし、
900℃で30分焼成した後電気的特性を測定した。Capacity 12500PF Apparent permittivity 850 Dielectric loss 5.6% Example 2 A paste of the composition of aluminum metal powder 90 parts lead metal powder 10 parts ethyl cellulose 8.6 parts carbitol acetate 60 parts was applied to the same green sheet as in Example 1 as an internal electrode. After printing the sheets as
The electrical properties were measured after baking at 900°C for 30 minutes.
容 量 14400PF
見掛誘電率 982
誘電損失 3.7％
実施例 ３
実施例１と同様のグリーンシートに
アルミニウム金属粉末 90部
鉛金属粉末 ５部
パラジウム金属粉末 ５部
エチルセルロース 8.6部
カルビトールアセテート 60部
の組成物のペーストを内部電極として印刷し、シ
ートを交互に積層した後所定寸法にカツトし、
950℃で30分焼成した後電気的特性を測定した。Capacity 14400PF Apparent permittivity 982 Dielectric loss 3.7% Example 3 Composition of aluminum metal powder 90 parts lead metal powder 5 parts palladium metal powder 5 parts ethyl cellulose 8.6 parts carbitol acetate 60 parts on a green sheet similar to Example 1 The paste is printed as internal electrodes, the sheets are laminated alternately, and then cut to the specified size.
The electrical properties were measured after baking at 950°C for 30 minutes.
容 量 15600PF
見掛誘電率 1064
誘電損失 2.4％
実施例 ４
実施例１と同様のグリーンシートに
アルミニウム金属粉末 90部
鉛金属粉末 ５部
銀粉末 ５部
の組成物のペーストを内部電極として印刷し、シ
ートを交互に積層した後所定寸法にカツトし、
950℃で30分焼成した後電気的特性を測定した。Capacity 15600PF Apparent permittivity 1064 Dielectric loss 2.4% Example 4 A paste of the composition of aluminum metal powder 90 parts lead metal powder 5 parts silver powder 5 parts was printed as an internal electrode on a green sheet similar to Example 1. After stacking the sheets alternately, cut them to the specified size,
The electrical properties were measured after baking at 950°C for 30 minutes.
容 量 15300PF
見掛誘電率 1040
誘電損失 2.5％
以上述べたようにアルミニウム金属を主体とし
た電極材料は積層内部電極として充分使用に耐え
ることが立証された。Capacity: 15300PF Apparent permittivity: 1040 Dielectric loss: 2.5% As mentioned above, it has been proven that the electrode material mainly made of aluminum metal can be used as a laminated internal electrode.
さらに誘電損失の減少と見掛誘電率の向上には
鉛、パラジウム、銀金属の添加が有効である。 Further, it is effective to add lead, palladium, and silver metals to reduce dielectric loss and improve apparent dielectric constant.
図はアルミニウム金属−鉛金属の内部電極材料
組成に対する見掛誘電率および誘電損失の依存性
を示す。鉛が５〜10重量％の組成のものが最も低
い誘電損失を示し、20重量％を越えると誘電損失
が増加し、見掛誘電率が減少する。 The figure shows the dependence of the apparent permittivity and dielectric loss on the internal electrode material composition of aluminum metal-lead metal. A composition containing 5 to 10% by weight of lead exhibits the lowest dielectric loss, and when lead exceeds 20% by weight, the dielectric loss increases and the apparent permittivity decreases.
これは内部電極金属と誘電体セラミツクの界面
で、金属酸化物の生成によるものと思われる。こ
のことは積層体の焼成温度を上げた場合には逆に
見掛誘電率が減少することからも理解できる。 This is thought to be due to the formation of metal oxides at the interface between the internal electrode metal and the dielectric ceramic. This can be understood from the fact that when the firing temperature of the laminate is increased, the apparent dielectric constant decreases.
さらに誘電体セラミツク中にマンガンが存在す
ると見掛誘電率が激減することからも類推するこ
とができる。 Furthermore, this can be inferred from the fact that the presence of manganese in dielectric ceramic drastically reduces the apparent dielectric constant.
以上説明したように本発明は廉価なアルミニウ
ム金属を積層内部電極材料として使用するため、
白金、パラジウムに比してはるかに安価に製作で
き、工業上極めて有益なものである。 As explained above, since the present invention uses inexpensive aluminum metal as the laminated internal electrode material,
It can be produced at a much lower cost than platinum or palladium, and is extremely useful industrially.
図は積層セラミツクコンデンサのアルミニウム
−鉛金属の内部電極材料組成に対する見掛誘電率
および誘電損失特性図である。
The figure is a diagram showing the apparent dielectric constant and dielectric loss characteristics for the aluminum-lead metal internal electrode material composition of a multilayer ceramic capacitor.
Claims (1)
層し焼成してなる積層セラミツクコンデンサにお
いて、該コンデンサの内部電極材料としてアルミ
ニウム金属を用いたことを特徴とする積層セラミ
ツクコンデンサ。 ２ 誘電体セラミツク材料と内部電極材料とを積
層し焼成してなる積層セラミツクコンデンサにお
いて、該コンデンサの内部電極材料としてアルミ
ニウム金属に20重量％以下の鉛を含有した金属組
成物を用いたことを特徴とする積層セラミツクコ
ンデンサ。[Scope of Claims] 1. A multilayer ceramic capacitor formed by laminating and firing a dielectric ceramic material and an internal electrode material, characterized in that aluminum metal is used as the internal electrode material of the capacitor. 2. A multilayer ceramic capacitor formed by laminating and firing a dielectric ceramic material and an internal electrode material, characterized in that a metal composition containing 20% by weight or less of lead in aluminum metal is used as the internal electrode material of the capacitor. A multilayer ceramic capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8224979A JPS566417A (en) | 1979-06-28 | 1979-06-28 | Laminated capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8224979A JPS566417A (en) | 1979-06-28 | 1979-06-28 | Laminated capacitor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS566417A JPS566417A (en) | 1981-01-23 |
| JPS6323648B2 true JPS6323648B2 (en) | 1988-05-17 |
Family
ID=13769151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8224979A Granted JPS566417A (en) | 1979-06-28 | 1979-06-28 | Laminated capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS566417A (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58177916A (en) * | 1982-04-13 | 1983-10-18 | Kowa Co | External drug |
| JPS593909A (en) * | 1982-06-29 | 1984-01-10 | ニチコン株式会社 | Electrode paste for ceramic condenser |
| JPS5916323A (en) * | 1982-07-19 | 1984-01-27 | 株式会社村田製作所 | Ceramic laminated condenser |
| JPS6089995A (en) * | 1983-10-24 | 1985-05-20 | 日本電気株式会社 | Composite laminated ceramic part |
| JP3531475B2 (en) * | 1998-05-22 | 2004-05-31 | 日亜化学工業株式会社 | Flip chip type optical semiconductor device |
| JP4483597B2 (en) * | 2005-01-20 | 2010-06-16 | Ｔｄｋ株式会社 | Electronic component, dielectric ceramic composition and method for producing the same |
| TW201107267A (en) * | 2009-08-21 | 2011-03-01 | Darfon Electronics Corp | Ceramic powder composition, ceramic material and laminated ceramic capacitor made of the same |
| JP5293971B2 (en) * | 2009-09-30 | 2013-09-18 | 株式会社村田製作所 | Multilayer ceramic electronic component and method of manufacturing multilayer ceramic electronic component |
| WO2011114809A1 (en) | 2010-03-16 | 2011-09-22 | 株式会社村田製作所 | Laminated ceramic electronic component |
| JP5527401B2 (en) * | 2010-03-16 | 2014-06-18 | 株式会社村田製作所 | Multilayer ceramic electronic components |
| JP5527404B2 (en) | 2010-03-16 | 2014-06-18 | 株式会社村田製作所 | Multilayer ceramic electronic components |
| WO2011114804A1 (en) * | 2010-03-16 | 2011-09-22 | 株式会社村田製作所 | Laminated ceramic electronic component |
| WO2012023406A1 (en) * | 2010-08-18 | 2012-02-23 | 株式会社村田製作所 | Laminated ceramic electronic component |
| JP5429393B2 (en) * | 2010-09-30 | 2014-02-26 | 株式会社村田製作所 | Multilayer ceramic electronic component and method of manufacturing multilayer ceramic electronic component |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5466450A (en) * | 1977-11-01 | 1979-05-29 | Univ Illinois | Unhomogeneous phase ceramic condenser |
| JPS54131762A (en) * | 1978-04-05 | 1979-10-13 | Honshu Paper Co Ltd | Metalized dielectric capacitor |
-
1979
- 1979-06-28 JP JP8224979A patent/JPS566417A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5466450A (en) * | 1977-11-01 | 1979-05-29 | Univ Illinois | Unhomogeneous phase ceramic condenser |
| JPS54131762A (en) * | 1978-04-05 | 1979-10-13 | Honshu Paper Co Ltd | Metalized dielectric capacitor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS566417A (en) | 1981-01-23 |
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