JPH04312904A - Laminated ceramic capacitor - Google Patents
Laminated ceramic capacitorInfo
- Publication number
- JPH04312904A JPH04312904A JP995191A JP995191A JPH04312904A JP H04312904 A JPH04312904 A JP H04312904A JP 995191 A JP995191 A JP 995191A JP 995191 A JP995191 A JP 995191A JP H04312904 A JPH04312904 A JP H04312904A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- electrodes
- external
- electrode
- 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.)
- Granted
Links
- 239000003985 ceramic capacitor Substances 0.000 title claims abstract description 20
- 239000010953 base metal Substances 0.000 claims abstract description 27
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000000919 ceramic Substances 0.000 claims abstract description 11
- 229910052802 copper Inorganic materials 0.000 claims abstract description 10
- 239000010949 copper Substances 0.000 claims abstract description 10
- 229910000881 Cu alloy Inorganic materials 0.000 claims abstract description 7
- 229910001092 metal group alloy Inorganic materials 0.000 claims abstract description 7
- 229910045601 alloy Inorganic materials 0.000 claims description 7
- 239000000956 alloy Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 abstract description 8
- 239000003990 capacitor Substances 0.000 abstract description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 22
- 229910052759 nickel Inorganic materials 0.000 description 10
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 7
- 229910052709 silver Inorganic materials 0.000 description 7
- 239000004332 silver Substances 0.000 description 7
- 229910001316 Ag alloy Inorganic materials 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 239000011133 lead Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- 229910000906 Bronze Inorganic materials 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- SWELZOZIOHGSPA-UHFFFAOYSA-N palladium silver Chemical compound [Pd].[Ag] SWELZOZIOHGSPA-UHFFFAOYSA-N 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 239000011135 tin Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
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、電極材料に改良を施し
た積層セラミックコンデンサに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multilayer ceramic capacitor having improved electrode materials.
【０００２】0002
【従来の技術】この種の積層セラミックコンデンサは、
平板状をなす複数の内部電極をセラミックを介して積層
して形成された積層チップと、該積層チップの対向壁に
付設された一対の外部電極とから構成されている。チッ
プ内の内部電極は交互に逆方向の外部電極に接続されて
おり、内部電極間で得られた所定の静電容量を外部電極
から取り出せるようになっている。[Prior art] This type of multilayer ceramic capacitor is
It consists of a stacked chip formed by stacking a plurality of flat internal electrodes with ceramic interposed therebetween, and a pair of external electrodes attached to opposing walls of the stacked chip. Internal electrodes within the chip are alternately connected to external electrodes in opposite directions, so that a predetermined capacitance obtained between the internal electrodes can be taken out from the external electrodes.
【０００３】上記の内部電極及び外部電極は、耐熱性及
び耐食性の関係から一般に銀や銀−パラジウム等の銀合
金から形成されている。しかし、これら金属は電極とし
て優れた特性を有する反面、材料価格が高く、このため
コンデンサ自体のコストが高価になる欠点があり、とり
わけ全体コストの３０〜４０％が内部電極に依存してい
る。[0003] The above-mentioned internal electrodes and external electrodes are generally made of silver or a silver alloy such as silver-palladium in view of heat resistance and corrosion resistance. However, although these metals have excellent properties as electrodes, they have the disadvantage that the material costs are high and the cost of the capacitor itself is therefore high, with 30 to 40% of the total cost being dependent on the internal electrodes.
【０００４】積層セラミックコンデンサに係わる価格的
な問題を解消するため、内部電極を安価な卑金属から形
成する試みもなされている。しかし、内部電極をニッケ
ル等の卑金属で形成した場合では、外部電極に銀または
銀合金を用いると両電極の馴染みが悪く、両電極に導通
不良を生じ易くなる欠点がある。In order to solve the cost problem associated with multilayer ceramic capacitors, attempts have been made to form internal electrodes from inexpensive base metals. However, when the internal electrodes are made of a base metal such as nickel, if silver or a silver alloy is used for the external electrodes, the two electrodes do not fit well, and there is a drawback that poor conductivity is likely to occur between the two electrodes.
【０００５】電極相互の馴染みの問題を解消するものと
して、内部電極を卑金属から形成する一方、外部電極を
、内部電極と同一または合金化した金属で形成され、且
つ内部電極に接続される第１層と、銀または銀合金で形
成され、且つ該第１層の外面に付設される第２層とから
構成したものも提案されている（特開昭５９−１６３２
３号公報参照）。つまり、この積層セラミックコンデン
サでは、内部電極に接続される外部電極部分を内部電極
と同一系の金属から形成することで、両電極の馴染みを
向上させ導通の改善を図っている。In order to solve the problem of mutual familiarity between the electrodes, the inner electrodes are made of a base metal, while the outer electrodes are made of the same or alloyed metal as the inner electrodes, and the first electrodes are connected to the inner electrodes. A structure comprising a layer and a second layer made of silver or a silver alloy and attached to the outer surface of the first layer has also been proposed (Japanese Patent Laid-Open No. 59-1632).
(See Publication No. 3). In other words, in this multilayer ceramic capacitor, the external electrode portion connected to the internal electrode is formed from the same metal as the internal electrode, thereby improving the familiarity between the two electrodes and improving conduction.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、上記の
積層セラミックコンデンサでは、内部電極と外部電極の
第１層との馴染みを向上できる反面、卑金属から成る第
１層と、銀または銀合金から成る第２層との馴染みが悪
いために、外部電極を構成する両層の境界部分に導通不
良を生じ、ｔａｎδが劣化したり、温度サイクルにより
静電容量抜けが発生する欠点がある。However, in the above-mentioned multilayer ceramic capacitor, although it is possible to improve the compatibility between the internal electrode and the first layer of the external electrode, the first layer made of base metal and the first layer made of silver or silver alloy can be improved. Due to poor compatibility with the two layers, poor conductivity occurs at the boundary between the two layers constituting the external electrode, resulting in deterioration of tan δ and loss of capacitance due to temperature cycling.
【０００７】本発明は上記問題点に鑑みてなされたもの
で、その目的とするところは、コンデンサ自体を安価に
形成できることは勿論のこと、外部電極の引張り強度を
維持しつつ、外部電極と内部電極の相互並びに外部電極
を構成する第１層と第２層との間に高い導通性を確保で
き、静電容量やｔａｎδ等の特性が劣化しない積層セラ
ミックコンデンサを提供することにある。The present invention was made in view of the above-mentioned problems, and its purpose is not only to form the capacitor itself at low cost, but also to maintain the tensile strength of the external electrode and the internal electrode. It is an object of the present invention to provide a multilayer ceramic capacitor which can ensure high conductivity between electrodes and between a first layer and a second layer constituting an external electrode, and whose characteristics such as capacitance and tan δ do not deteriorate.
【０００８】[0008]
【課題を解決するための手段】上記目的を達成するため
、本発明では、セラミックを介して積層された複数の内
部電極と、内部電極と所定の接続関係をもって導通する
一対の外部電極とを具備した積層セラミックコンデンサ
において、上記内部電極を卑金属または卑金属の合金か
ら形成すると共に、上記外部電極を、卑金属または卑金
属の合金から成り内部電極に接続される第１層と、銅ま
たは銅合金から成り第１層の外面に付設された第２層と
から形成している。[Means for Solving the Problems] In order to achieve the above object, the present invention includes a plurality of internal electrodes laminated with ceramic interposed therebetween, and a pair of external electrodes that are electrically connected to the internal electrodes in a predetermined connection relationship. In the multilayer ceramic capacitor, the internal electrode is formed of a base metal or a base metal alloy, and the external electrode is formed of a first layer made of a base metal or a base metal alloy and connected to the internal electrode, and a first layer made of copper or a copper alloy. It is formed by a second layer attached to the outer surface of one layer.
【０００９】[0009]
【作用】本発明に係る積層セラミックコンデンサでは、
内部電極に接続される外部電極の第１層が内部電極と同
じ卑金属または卑金属の合金から形成されているので、
両者の馴染みがよくその境界部分に高い導通性を確保で
きる。また、外部電極の第２層が卑金属の１つである銅
または銅合金から形成されているので、該第２層を銀ま
たは銀合金から形成する場合に比べて第１層に対する馴
染みがよく、両者の境界部分に高い導通性を確保できる
。[Operation] In the multilayer ceramic capacitor according to the present invention,
Since the first layer of the external electrode connected to the internal electrode is made of the same base metal or base metal alloy as the internal electrode,
The two are well-familiar and high conductivity can be ensured at the boundary. Furthermore, since the second layer of the external electrode is made of copper or a copper alloy, which is one of the base metals, it is more compatible with the first layer than when the second layer is made of silver or a silver alloy. High conductivity can be ensured at the boundary between the two.
【００１０】0010
【実施例】図１は本発明を適用した積層セラミックコン
デンサの断面図である。DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a sectional view of a multilayer ceramic capacitor to which the present invention is applied.
【００１１】この積層セラミックコンデンサは、平板状
をなす複数（図中は５枚）の内部電極１をセラミック２
を介して積層して形成された角形の積層チップ３と、該
積層チップ３の内部電極方向の対向壁に付設された一対
の外部電極４とから構成されている。This multilayer ceramic capacitor has a plurality of flat internal electrodes 1 (five in the figure) made of ceramic 2.
It is composed of a rectangular multilayer chip 3 formed by stacking the multilayer chip 3 with the multilayer chip 3 interposed therebetween, and a pair of external electrodes 4 attached to opposing walls of the multilayer chip 3 in the direction of the internal electrodes.
【００１２】上記内部電極１は間隔をおいて交互に位置
をずらせて平行に配置されており、その内の３枚の端縁
を図中右側の対向壁から露出し、また２枚の端縁を図中
左側の対向壁から露出している。The internal electrodes 1 are arranged parallel to each other at intervals, with three edges exposed from the opposite wall on the right side in the figure, and two edges exposed from the opposing wall on the right side in the figure. is exposed from the opposite wall on the left side of the figure.
【００１３】この内部電極１は、ニッケル，銅，鉛，亜
鉛，鉄，錫，アルミニウム，コバルト，クロム等の卑金
属から選択される１種またはその合金から成り、好まし
くはニッケル，銅，鉛及びこれらの合金が使用される。The internal electrode 1 is made of one selected from base metals such as nickel, copper, lead, zinc, iron, tin, aluminum, cobalt, and chromium, or an alloy thereof, preferably nickel, copper, lead, and an alloy thereof. alloys are used.
【００１４】上記各外部電極４は、積層チップ３の壁面
にその周縁に及んで付設された第１層４ａと、該第１層
４ａの外面を覆うようにして付設された第２層４ｂとか
ら構成されている。各外部電極４の第１層４ａは夫々の
対向壁から露出する内部電極１の端縁に接合している。Each of the external electrodes 4 includes a first layer 4a attached to the wall surface of the multilayer chip 3 extending to its periphery, and a second layer 4b attached so as to cover the outer surface of the first layer 4a. It consists of The first layer 4a of each external electrode 4 is joined to the edge of the internal electrode 1 exposed from the respective opposing wall.
【００１５】この外部電極４の第１層４ａは、内部電極
１と同様に卑金属または卑金属の合金から選択されるが
、必ずしも内部電極１と同一金属である必要はない。The first layer 4a of the external electrode 4 is selected from a base metal or an alloy of a base metal like the internal electrode 1, but does not necessarily need to be made of the same metal as the internal electrode 1.
【００１６】また、外部電極４の第２層４ｂは、銅また
は銅合金から成り、銅合金としては黄銅系合金や青銅系
合金等から選択的に使用される。The second layer 4b of the external electrode 4 is made of copper or a copper alloy, and the copper alloy is selectively selected from brass alloys, bronze alloys, and the like.
【００１７】以下に、本発明に係る積層セラミックコン
デンサの好適な具体例をその製造方法を交えて説明する
。[0017] Preferred specific examples of the multilayer ceramic capacitor according to the present invention will be described below, along with a method for manufacturing the same.
【００１８】まず、非還元性のセラミック組成物から成
る厚さ１０〜６０μｍのセラミックシ−トの一面に、内
部電極となるニッケル粉末のペ−ストを数μｍの厚みで
、しかも多数の長方形が規則的に並ぶようにして印刷す
る。First, a paste of nickel powder, which will become an internal electrode, is applied to a thickness of several micrometers on one side of a ceramic sheet made of a non-reducible ceramic composition with a thickness of 10 to 60 μm, and in which a large number of rectangles are formed. Print them in regular order.
【００１９】次に、印刷後のセラミックシ−トを１枚宛
平面方向に位置をずらして２０〜１００枚積層し、これ
を積層方向に所定の大きさで切断してチップ材を形成す
る。切断されたチップ材の対向壁には内部電極となるニ
ッケル層が露出する。Next, 20 to 100 printed ceramic sheets are stacked one by one with their positions shifted in the plane direction, and the sheets are cut into a predetermined size in the stacking direction to form a chip material. A nickel layer serving as an internal electrode is exposed on the opposite wall of the cut chip material.
【００２０】次に、このチップ材のニッケル層が露出す
る対向壁夫々に、外部電極の第１層となるニッケル粉末
のペ−ストを数μｍ〜数十μｍの厚みをもって塗布する
。Next, a paste of nickel powder, which will become the first layer of the external electrode, is applied to each of the opposing walls of the chip material where the nickel layer is exposed to a thickness of several μm to several tens of μm.
【００２１】次に、ペ−スト塗布後のチップ材を中性ま
たは還元性雰囲気中で１３００℃程度の温度で焼成する
。この焼成によってセラミック焼成体が得られると同時
に、内部電極と外部電極第１層のペ−ストの焼付けが行
なわれる。Next, the chip material coated with the paste is fired at a temperature of about 1300° C. in a neutral or reducing atmosphere. By this firing, a fired ceramic body is obtained, and at the same time, the paste of the internal electrode and the first layer of the external electrode is fired.
【００２２】次に、外部電極の第１層の外面に、外部電
極の第２層となる銅粉末のペ−ストを第１層と同程度の
厚みをもって塗布する。Next, a paste of copper powder, which will become the second layer of the external electrode, is applied to the outer surface of the first layer of the external electrode to a thickness comparable to that of the first layer.
【００２３】次に、ペ−スト塗布後のチップ材を中性ま
たは還元性雰囲気中で８００℃程度の温度で焼成する。
この焼成によって外部電極第２層のペ−ストの焼付けが
行なわれる。Next, the chip material coated with the paste is fired at a temperature of about 800° C. in a neutral or reducing atmosphere. By this firing, the paste of the second layer of the external electrode is baked.
【００２４】以上で、内部電極１及び外部電極４の第１
層４ａがニッケルから成り、また外部電極４の第２層４
ｂが銅から成る、図１に示すような積層セラミックコン
デンサが製造される。[0024] In the above, the first
The layer 4a is made of nickel, and the second layer 4 of the external electrode 4
A multilayer ceramic capacitor as shown in FIG. 1 is manufactured in which b is made of copper.
【００２５】上記の積層セラミックコンデンサでは、内
部電極１に接続される外部電極４の第１層４ａが内部電
極１と同じニッケルから形成されているので、両者の馴
染みがよくその境界部分に高い導通性を確保できる。ま
た、外部電極４の第２層４ｂが卑金属の１つである銅か
ら形成されているので、該第２層４ｂを銀または銀合金
から形成する場合に比べて第１層４ａに対する馴染みが
よく、両者の境界部分に高い導通性を確保できる。In the above-described multilayer ceramic capacitor, the first layer 4a of the external electrode 4 connected to the internal electrode 1 is made of the same nickel as the internal electrode 1, so that the two are compatible and there is high conductivity at the boundary. can ensure sex. Furthermore, since the second layer 4b of the external electrode 4 is made of copper, which is one of the base metals, it is more compatible with the first layer 4a than when the second layer 4b is made of silver or a silver alloy. , high conductivity can be ensured at the boundary between the two.
【００２６】因みに、先に述べた方法に従って、内部電
極及び外部電極の第１層がニッケルで第２層が銅から成
り、長さ，幅及び高さが３．２ｍｍ，１．６ｍｍ，１．
２５ｍｍで設計容量が１．０μＦのＦ特性積層セラミッ
クコンデンサ（発明品）と、内部電極及び外部電極の第
１層がニッケルで第２層が銀から成り、同寸法で同容量
のＦ特性積層コンデンサ（従来品）とを夫々１００個宛
製造し、製品中で容量が０．９μＦ以下のものとｔａｎ
δが５％以上のものの個数を調べると共に、各々の製品
にＪＩＳ Ｃ５１０２で定められる温度サイクル試験
を行なってから同個数を調べたところ、発明品では温度
サイクル試験の前後に不良品の発生が全く見られなかっ
たのに対し、従来品では温度サイクル試験後に容量０．
９μＦ以下のものが３個、ｔａｎδ５％以上のものが８
個現われた。Incidentally, according to the method described above, the first layer of the internal electrode and the external electrode was made of nickel and the second layer was made of copper, and the length, width, and height were 3.2 mm, 1.6 mm, and 1.5 mm.
An F-characteristic multilayer ceramic capacitor (invented product) with a design capacity of 1.0 μF and a 25mm diameter, and an F-characteristic multilayer capacitor with the same size and capacitance in which the first layer of the internal and external electrodes is nickel and the second layer is silver. (conventional product) and 100 pieces each.
In addition to checking the number of products with δ of 5% or more, we also conducted a temperature cycle test on each product as specified in JIS C5102 and then checked the number of products, and found that the invented product did not produce any defective products before or after the temperature cycle test. In contrast, with the conventional product, the capacity was 0.0 after the temperature cycle test.
3 with 9 μF or less, 8 with tan δ 5% or more
One person appeared.
【００２７】尚、内部電極及び外部電極の第１層として
ニッケル以外の卑金属または卑金属の合金を用いる場合
や、外部電極の第２層として銅合金を用いる場合も上記
と同様の製造方法で積層セラミックコンデンサを得るこ
とができ、しかも同様の効果を得ることができる。Furthermore, when using a base metal other than nickel or an alloy of base metals as the first layer of the internal electrode and the external electrode, or when using a copper alloy as the second layer of the external electrode, the same manufacturing method as above can be used to produce the laminated ceramic. A capacitor can be obtained, and the same effect can be obtained.
【００２８】[0028]
【発明の効果】以上詳述したように本発明によれば、内
部電極及び外部電極に材料価格の低い卑金属または卑金
属の合金を用いているのでコンデンサ自体をより一層安
価に形成できることに加え、外部電極と内部電極の相互
並びに外部電極を構成する第１層と第２層との間に高い
導通性を確保できる。As described in detail above, according to the present invention, since base metals or base metal alloys of low material cost are used for the internal electrodes and the external electrodes, the capacitor itself can be formed at a lower cost. High conductivity can be ensured between the electrodes and the internal electrodes as well as between the first layer and the second layer constituting the external electrodes.
【図１】本発明を適用した積層セラミックコンデンサの
断面図[Figure 1] Cross-sectional view of a multilayer ceramic capacitor to which the present invention is applied
１…内部電極、２…セラミック、３…積層チップ、４…
外部電極、４ａ…第１層、４ｂ…第２層。1... Internal electrode, 2... Ceramic, 3... Laminated chip, 4...
External electrode, 4a...first layer, 4b...second layer.
Claims (1)
電極と、内部電極と所定の接続関係をもって導通する一
対の外部電極とを具備した積層セラミックコンデンサに
おいて、上記内部電極を卑金属または卑金属の合金から
形成すると共に、上記外部電極を、卑金属または卑金属
の合金から成り内部電極に接続される第１層と、銅また
は銅合金から成り第１層の外面に付設された第２層とか
ら形成した、ことを特徴とする積層セラミックコンデン
サ。1. A multilayer ceramic capacitor comprising a plurality of internal electrodes laminated with ceramic interposed therebetween and a pair of external electrodes that are electrically connected to the internal electrodes in a predetermined connection relationship, wherein the internal electrodes are made of a base metal or a base metal alloy. and the external electrode was formed from a first layer made of a base metal or an alloy of base metals and connected to the internal electrode, and a second layer made of copper or a copper alloy and attached to the outer surface of the first layer. , a multilayer ceramic capacitor characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP995191A JPH088192B2 (en) | 1991-01-30 | 1991-01-30 | Monolithic ceramic capacitors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP995191A JPH088192B2 (en) | 1991-01-30 | 1991-01-30 | Monolithic ceramic capacitors |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04312904A true JPH04312904A (en) | 1992-11-04 |
| JPH088192B2 JPH088192B2 (en) | 1996-01-29 |
Family
ID=11734282
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP995191A Expired - Fee Related JPH088192B2 (en) | 1991-01-30 | 1991-01-30 | Monolithic ceramic capacitors |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH088192B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101949481B1 (en) * | 2018-05-04 | 2019-05-02 | (주)케이앤씨바이오 | The composition of feed consumption improver, and method for manufacturing thereof |
-
1991
- 1991-01-30 JP JP995191A patent/JPH088192B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH088192B2 (en) | 1996-01-29 |
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