JP2003077755A - Capacitor - Google Patents
CapacitorInfo
- Publication number
- JP2003077755A JP2003077755A JP2001263253A JP2001263253A JP2003077755A JP 2003077755 A JP2003077755 A JP 2003077755A JP 2001263253 A JP2001263253 A JP 2001263253A JP 2001263253 A JP2001263253 A JP 2001263253A JP 2003077755 A JP2003077755 A JP 2003077755A
- Authority
- JP
- Japan
- Prior art keywords
- capacitor
- internal electrodes
- dielectric layer
- capacitance
- ceramic
- 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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は例えばＲＦモジュー
ルのカップリングやマッチング回路などに使用されるコ
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 capacitor used in a coupling or matching circuit of an RF module, for example.
【０００２】[0002]
【従来の技術】従来のコンデンサについて説明する。2. Description of the Related Art A conventional capacitor will be described.
【０００３】容量が１０ｐＦ以下というコンデンサは、
比誘電率が３０〜７０の誘電体層と内部電極とを交互に
積層し、内部電極の露出した端面に外部電極を形成した
ものであった。A capacitor having a capacitance of 10 pF or less is
The dielectric layers having a relative dielectric constant of 30 to 70 and the internal electrodes were alternately laminated, and the external electrodes were formed on the exposed end faces of the internal electrodes.
【０００４】この誘電体層はＣａＴｉＯ3系のセラミッ
クからなるものである。また内部電極はパラジウムやニ
ッケルが一般的であった。This dielectric layer is made of CaTiO 3 ceramic. Further, the internal electrodes were generally palladium or nickel.
【０００５】[0005]
【発明が解決しようとする課題】上記構成においては、
誘電体層の比誘電率が３０〜７０とそれほど小さくない
ために、積層体の形成時に内部電極に位置ずれが生じる
と容量が大きく変わるため、所望の容量を有するコンデ
ンサを生産性良く得ることができないという問題点を有
していた。In the above configuration,
Since the relative permittivity of the dielectric layer is not so small as 30 to 70, if the internal electrodes are misaligned during the formation of the laminated body, the capacitance changes greatly, so that a capacitor having a desired capacitance can be obtained with high productivity. It had a problem that it could not be done.
【０００６】そこで本発明は、容量が１０ｐＦ以下のコ
ンデンサを生産性良く得ることを目的とするものであ
る。Therefore, an object of the present invention is to obtain a capacitor having a capacitance of 10 pF or less with high productivity.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するため
に、以下の構成を有するものである。In order to achieve the above object, it has the following constitution.
【０００８】本発明の請求項１に記載の発明は、特に、
誘電体層の比誘電率を１０未満としたものであり、多少
の内部電極の位置ずれが生じたとしても容量が１０ｐＦ
以下のコンデンサを生産性良く得ることができる。The invention according to claim 1 of the present invention is
The relative dielectric constant of the dielectric layer is less than 10, and the capacitance is 10 pF even if the internal electrodes are slightly displaced.
The following capacitors can be obtained with good productivity.
【０００９】本発明の請求項２に記載の発明は、特に、
誘電体層としてガラスセラミックを用いたものであり、
内部電極に高周波帯域での損失を小さくできる銀や銅を
使用することができる。The invention according to claim 2 of the present invention is
It uses glass ceramic as the dielectric layer,
It is possible to use silver or copper for the internal electrodes, which can reduce loss in the high frequency band.
【００１０】本発明の請求項３に記載の発明は、特に、
内部電極に銀または銅を用いたものであり、高周波帯域
の損失を小さくできる。The invention according to claim 3 of the present invention is
Since silver or copper is used for the internal electrodes, the loss in the high frequency band can be reduced.
【００１１】本発明の請求項４に記載の発明は、特に、
誘電体層としてＡｌ2Ｏ3−ＭｇＯ−ＳｉＯ2−Ｇｅ2Ｏ3
系組成物及びホウケイ酸ガラスを含有するものを用いた
ものであり、内部電極に高周波帯域での損失が小さい銀
または銅を使用することができる。The invention according to claim 4 of the present invention is
As a dielectric layer, Al 2 O 3 —MgO—SiO 2 —Ge 2 O 3
The composition containing the system composition and borosilicate glass is used, and silver or copper, which has a small loss in a high frequency band, can be used for the internal electrode.
【００１２】[0012]
【発明の実施の形態】以下、一実施の形態を用いて、本
発明の請求項１〜請求項４に記載の発明について説明す
る。BEST MODE FOR CARRYING OUT THE INVENTION The invention described in claims 1 to 4 of the present invention will be described below with reference to one embodiment.
【００１３】図１は一実施の形態における積層セラミッ
クコンデンサの一部切欠斜視図であり、１１はＡｌ2Ｏ3
−ＭｇＯ−ＳｉＯ2−Ｇｅ2Ｏ3系組成物及びホウケイ酸
ガラスを含有する比誘電率が約７の誘電体層、１２はＡ
ｇまたはＣｕを主成分とする内部電極、１３は誘電体層
１１と内部電極１２とを交互に積層した積層体、１４は
積層体１３の内部電極１２の露出した両端面に設けた外
部電極である。FIG. 1 is a partially cutaway perspective view of a monolithic ceramic capacitor according to an embodiment, and 11 is Al 2 O 3
-MgO-SiO 2 -Ge 2 O 3 based composition and dielectric constant containing borosilicate glass is approximately 7 of the dielectric layer, 12 is A
An internal electrode containing g or Cu as a main component, 13 is a laminated body in which dielectric layers 11 and internal electrodes 12 are alternately laminated, and 14 is an external electrode provided on both exposed end surfaces of the internal electrode 12 of the laminated body 13. is there.
【００１４】以上のように構成された積層セラミックコ
ンデンサ（１００５サイズ、０．７ｐＦ）の製造方法に
ついて説明する。A method of manufacturing the monolithic ceramic capacitor (1005 size, 0.7 pF) configured as described above will be described.
【００１５】まず、Ａｌ2Ｏ3−ＭｇＯ−ＳｉＯ2−Ｇｅ2
Ｏ3系組成物及びホウケイ酸ガラスを含むセラミック材
料に、酢酸ブチル、有機バインダ、可塑剤を加えて混合
し、スラリーを得る。First, Al 2 O 3 --MgO--SiO 2 --Ge 2
Butyl acetate, an organic binder, and a plasticizer are added to a ceramic material containing an O 3 composition and borosilicate glass and mixed to obtain a slurry.
【００１６】次にこのスラリーをリバースロール法でシ
ート化し、適当な大きさに切断し、誘電体層１１となる
セラミックグリーンシートを得る。Next, the slurry is formed into a sheet by a reverse roll method and cut into a suitable size to obtain a ceramic green sheet which will become the dielectric layer 11.
【００１７】次いでこのセラミックグリーンシート上に
内部電極１２となるＡｇまたはＣｕを主成分とする電極
ペーストを所望の形状に印刷し、セラミックグリーンシ
ートと内部電極１２が交互になるように積層して積層体
を形成し、所望のサイズの個片に切断し、積層体１３を
得る。Next, an electrode paste containing Ag or Cu as a main component to form the internal electrodes 12 is printed on the ceramic green sheets in a desired shape, and the ceramic green sheets and the internal electrodes 12 are laminated in an alternating manner. A body is formed and cut into pieces of a desired size to obtain a laminated body 13.
【００１８】その後積層体１３を４００〜７００℃で熱
処理して脱脂を行って、有機成分を飛散させた後、８５
０〜９５０℃で焼成する。After that, the laminated body 13 is heat-treated at 400 to 700 ° C. to degrease it to scatter the organic components, and then 85
Bake at 0-950 ° C.
【００１９】次いで積層体１３の表面を研磨し、内部電
極１２の露出した両端面に外部電極１４となるＡｇペー
ストを塗布し、８００〜９００℃で焼き付けて図１に示
すコンデンサを得る。Next, the surface of the laminated body 13 is polished, Ag paste serving as the external electrodes 14 is applied to both exposed end surfaces of the internal electrodes 12, and baked at 800 to 900 ° C. to obtain the capacitor shown in FIG.
【００２０】このようにして得たコンデンサの容量及び
Ｑ値を(表１)、(表２)に示す。Ｎｏ．１は従来のコンデ
ンサであり比較例である。またこれらのコンデンサはす
べて０．７ｐＦを有するように各５ロットずつ作製し
た。The capacitance and Q value of the capacitors thus obtained are shown in (Table 1) and (Table 2). No. Reference numeral 1 is a conventional capacitor, which is a comparative example. Further, each of these capacitors was manufactured in 5 lots so as to have 0.7 pF.
【００２１】[0021]
【表１】 [Table 1]
【００２２】[0022]
【表２】 [Table 2]
【００２３】（表２）には、ロット毎の容量の平均値及
びその偏差およびロット１全体の歩留まりを示してい
る。歩留まりは０．７ｐＦ±１０％を良品とした時の値
である。Table 2 shows the average value of the capacity of each lot, its deviation, and the yield of the whole lot 1. The yield is a value when 0.7 pF ± 10% is a good product.
【００２４】比誘電率が６０のＮｏ．１のコンデンサ
は、各ロットの平均容量のバラツキが非常に大きくなっ
ている。これに対し、比誘電率が１０以下のＮｏ．２〜
４は全て平均容量のバラツキが小さい。また、ロット１
の歩留まりもＮｏ．１に比べＮｏ．２〜４では大きく改
善されていることがわかる。No. 1 having a relative dielectric constant of 60 The capacitor No. 1 has a very large variation in the average capacity of each lot. On the other hand, in No. 2 to
All 4 have small variations in average capacity. Also, lot 1
The yield of No. No. 1 compared to 1. It can be seen that in Nos. 2 to 4, there is a great improvement.
【００２５】また、内部電極１２としてパラジウムを用
いたＮｏ．２と比較すると、導電率がパラジウムの５倍
以上ある銀や銅を用いたＮｏ．３，４の方が、１ＧＨｚ
といった高周波帯域でのＱ値は非常に大きい。従って損
失の少ないコンデンサとなる。In addition, No. 1 using palladium as the internal electrode 12 In comparison with No. 2, No. 2 using silver or copper, whose conductivity is 5 times or more that of palladium. 3 and 4 are 1 GHz
The Q value in the high frequency band is very large. Therefore, the capacitor has a small loss.
【００２６】このように、誘電体層１１を結晶化ガラス
とセラミックを混合したガラスセラミック、例えばホウ
ケイ酸ガラスとＡｌ2Ｏ3−ＭｇＯ−ＳｉＯ2−Ｇｅ2Ｏ3
系組成物を用いて形成することにより、比誘電率が１０
未満と小さいので、内部電極１２の形成位置に多少のず
れが発生したとしても、容量が１０ｐＦと小さいコンデ
ンサを生産性良く得ることができる。Thus, the dielectric layer 11 is a glass-ceramic in which crystallized glass and ceramic are mixed, for example, borosilicate glass and Al 2 O 3 --MgO--SiO 2 --Ge 2 O 3
The relative permittivity is 10 when formed by using the system composition.
Therefore, even if the position where the internal electrode 12 is formed is slightly displaced, a capacitor having a small capacitance of 10 pF can be obtained with good productivity.
【００２７】また従来使用していたパラジウムの５倍以
上の導電率を有する銀や銅を用いて内部電極１２を形成
することにより、高周波帯域における損失の少ないコン
デンサを得ることができる。Further, by forming the internal electrode 12 using silver or copper having a conductivity five times or more that of the conventionally used palladium, it is possible to obtain a capacitor with a small loss in a high frequency band.
【００２８】[0028]
【発明の効果】以上のように本発明は、誘電体層の比誘
電率が１０未満と小さくすることにより、容量が１０ｐ
Ｆ以下と低容量のコンデンサを生産性良く得ることがで
きる。As described above, according to the present invention, the dielectric constant of the dielectric layer is as small as less than 10, so that the capacitance is 10 p.
Capacitors of F or less and low capacity can be obtained with good productivity.
【図１】本発明の一実施の形態における積層セラミック
コンデンサの一部切欠斜視図FIG. 1 is a partially cutaway perspective view of a monolithic ceramic capacitor according to an embodiment of the present invention.
１１ 誘電体層 １２ 内部電極 １３ 積層体 １４ 外部電極 11 Dielectric layer 12 internal electrodes 13 laminate 14 External electrode
───────────────────────────────────────────────────── フロントページの続き (72)発明者 小西 彰仁 大阪府門真市大字門真1006番地 松下電器 産業株式会社内 Ｆターム(参考） 5E001 AB03 AE02 AH01 AJ01 AJ02 5E082 AA01 AB03 FF05 FG06 FG25 FG26 FG46 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Akinori Konishi 1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric Sangyo Co., Ltd. F-term (reference) 5E001 AB03 AE02 AH01 AJ01 AJ02 5E082 AA01 AB03 FF05 FG06 FG25 FG26 FG46
Claims (4)
積層体と、この積層体の表面に前記内部電極と電気的に
接続するように設けた外部電極とを備え、前記誘電体層
は比誘電率が１０未満であり、容量を１０ｐＦ以下とし
たコンデンサ。1. A dielectric layer comprising: a laminated body in which dielectric layers and internal electrodes are alternately laminated; and external electrodes provided on the surface of the laminated body so as to be electrically connected to the internal electrodes. Is a capacitor having a relative dielectric constant of less than 10 and a capacitance of 10 pF or less.
混合したガラスセラミックである請求項１に記載のコン
デンサ。2. The capacitor according to claim 1, wherein the dielectric layer is a glass ceramic obtained by mixing crystallized glass and ceramic.
記載のコンデンサ。3. The capacitor according to claim 1, wherein the internal electrodes are silver or copper.
−Ｇｅ2Ｏ3系組成物及びホウケイ酸ガラスを含有する請
求項１に記載のコンデンサ。4. The dielectric layer is Al 2 O 3 —MgO—SiO 2
-Ge 2 O 3 type capacitor according to claim 1 containing the composition and borosilicate glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001263253A JP2003077755A (en) | 2001-08-31 | 2001-08-31 | Capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001263253A JP2003077755A (en) | 2001-08-31 | 2001-08-31 | Capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003077755A true JP2003077755A (en) | 2003-03-14 |
Family
ID=19090037
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001263253A Pending JP2003077755A (en) | 2001-08-31 | 2001-08-31 | Capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003077755A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100706686B1 (en) | 2004-04-09 | 2007-04-11 | 티디케이가부시기가이샤 | Laminated electronic parts and manufacturing method thereof |
| JP2013115424A (en) * | 2011-11-25 | 2013-06-10 | Samsung Electro-Mechanics Co Ltd | Multilayer ceramic electronic component and manufacturing method for the same |
| JP2017216360A (en) * | 2016-05-31 | 2017-12-07 | 太陽誘電株式会社 | Multilayer ceramic capacitor |
| JP2017216358A (en) * | 2016-05-31 | 2017-12-07 | 太陽誘電株式会社 | Multilayer ceramic capacitor |
| JP2017216361A (en) * | 2016-05-31 | 2017-12-07 | 太陽誘電株式会社 | Multilayer ceramic capacitor and method for manufacturing the same |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0748171A (en) * | 1993-08-04 | 1995-02-21 | Yamamura Glass Co Ltd | Composition for low-temperature baked substrate and substrate therefrom |
| JPH0786079A (en) * | 1993-06-28 | 1995-03-31 | Taiyo Yuden Co Ltd | Chip capacitor for high frequency |
| JP2000247682A (en) * | 1999-02-26 | 2000-09-12 | Kyocera Corp | Glass ceramic wiring board |
-
2001
- 2001-08-31 JP JP2001263253A patent/JP2003077755A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0786079A (en) * | 1993-06-28 | 1995-03-31 | Taiyo Yuden Co Ltd | Chip capacitor for high frequency |
| JPH0748171A (en) * | 1993-08-04 | 1995-02-21 | Yamamura Glass Co Ltd | Composition for low-temperature baked substrate and substrate therefrom |
| JP2000247682A (en) * | 1999-02-26 | 2000-09-12 | Kyocera Corp | Glass ceramic wiring board |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100706686B1 (en) | 2004-04-09 | 2007-04-11 | 티디케이가부시기가이샤 | Laminated electronic parts and manufacturing method thereof |
| JP2013115424A (en) * | 2011-11-25 | 2013-06-10 | Samsung Electro-Mechanics Co Ltd | Multilayer ceramic electronic component and manufacturing method for the same |
| JP2017216360A (en) * | 2016-05-31 | 2017-12-07 | 太陽誘電株式会社 | Multilayer ceramic capacitor |
| JP2017216358A (en) * | 2016-05-31 | 2017-12-07 | 太陽誘電株式会社 | Multilayer ceramic capacitor |
| JP2017216361A (en) * | 2016-05-31 | 2017-12-07 | 太陽誘電株式会社 | Multilayer ceramic capacitor and method for manufacturing the same |
| US10522291B2 (en) | 2016-05-31 | 2019-12-31 | Taiyo Yuden Co., Ltd. | Multilayer ceramic capacitor and manufacturing method of multilayer ceramic capacitor |
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