JPWO2007072894A1 - 熱硬化性導電ペースト及びそれを用いて形成した外部電極を有する積層セラミック部品 - Google Patents
熱硬化性導電ペースト及びそれを用いて形成した外部電極を有する積層セラミック部品 Download PDFInfo
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- JPWO2007072894A1 JPWO2007072894A1 JP2007551136A JP2007551136A JPWO2007072894A1 JP WO2007072894 A1 JPWO2007072894 A1 JP WO2007072894A1 JP 2007551136 A JP2007551136 A JP 2007551136A JP 2007551136 A JP2007551136 A JP 2007551136A JP WO2007072894 A1 JPWO2007072894 A1 JP WO2007072894A1
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- conductive paste
- component
- thermosetting conductive
- alloy
- metal powder
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/018—Dielectrics
- H01G4/06—Solid dielectrics
- H01G4/08—Inorganic dielectrics
- H01G4/12—Ceramic dielectrics
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/228—Terminals
- H01G4/232—Terminals electrically connecting two or more layers of a stacked or rolled capacitor
- H01G4/2325—Terminals electrically connecting two or more layers of a stacked or rolled capacitor characterised by the material of the terminals
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
- C08G59/50—Amines
- C08G59/5046—Amines heterocyclic
- C08G59/5053—Amines heterocyclic containing only nitrogen as a heteroatom
- C08G59/5073—Amines heterocyclic containing only nitrogen as a heteroatom having two nitrogen atoms in the ring
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
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Abstract
Description
1…積層セラミックコンデンサ
2…セラミック誘電体
3…内部電極層
4…外部電極層
5…メッキ処理層
実施例及び比較例で使用した導電ペーストの組成(表中の数字は、断りのない限り重量部である)は、以下の表1のとおりである。
−球状Ag粉末A:平均粒子径0.3μm、純度99.5%以上
−フレーク状Ag粉末:平均粒子径12μm、純度99%以上
−Ag微粉末含有ペースト:
製造方法は次のとおり。10Lのガラス製反応容器に3−メトキシプロピルアミン3.0kg(30.9mol)を入れた。撹拌しながら、反応温度を45℃以下に保持しつつ、酢酸銀5.0kg(30.0mol)を添加した。添加直後は、透明な溶液となり溶解していくが、添加が進むにつれ溶液が次第に濁り、全量を添加すると灰茶濁色の粘調溶液となった。そこへ95重量%のギ酸1.0kg(21.0mol)をゆっくり滴下した。滴下直後から激しい発熱が認められたが、その間、反応温度を30〜45℃に保持した。当初、灰濁色の粘調溶液が、茶色から黒色へ変化した。全量を滴下した後反応を終了させた。反応混合物を40℃で静置すると二層に分かれた。上層は黄色の透明な液であり、下層には黒色の銀微粒子が沈降した。上層の液には、銀成分が含まれていなかった。上層の液をデカンテーションで除去し、メタノールを使用して層分離させて銀含有率89重量%のAg微粉末含有ペーストを得た。
ペースト中のAg微粉末は次のとおり。平均粒子径61nm、結晶子径40nm、平均粒子径/結晶子径=1.5。平均粒子径は、Ag微粉末含有ペースト約0.5gを、分散水(AEROSOL0.5%含有水)50ccに添加し、超音波分散機で5分間分散し、試料を、ベックマン・コールター社製レーザ回折散乱式粒度分布測定装置(LS230)により測定した値であり、結晶子径は、マックサイエンス社製X線回折測定装置(M18XHF22)による測定によって、CuのKα線を線源とした面指数(1,1,1)面ピークの半値幅を求め、Scherrerの式より計算した値である。
−球状Cu85Ag合金粉末:CuとAgの重量割合(Cu:Ag)が85:15。融点1010℃、平均粒子径2.5μm、純度99%以上
−球状Sn80Ag合金粉末:SnとAgの重量割合(Sn:Ag)が80:20。融点330℃、平均粒子径2.5μm、純度99%以上
−球状Sn35Ag合金粉末:SnとAgの重量割合(Sn:Ag)が35:65。融点590℃、平均粒子径2.5μm、純度99%以上
−エポキシ樹脂A:ビスフェノールA型、数平均分子量1800
表1に示した組成を有する導電ペーストを、チップ積層コンデンサのセラミック複合体(1608タイプ、B特性、Ni内部電極、理論容量1μF)の内部電極取り出し面に、硬化後の厚さが50μm程度になるように均一に浸漬塗布し、150℃で10分間乾燥した後、大気中で300℃、30分間硬化を行い外部電極を形成した。続いてワット浴でNiメッキを行い、次いで電気メッキによりSnメッキを行い、チップ積層コンデンサを得た。
上記で得られたチップ積層コンデンサ素子の初期電気特性(静電容量、tanδ)をAgilent製4278Aで測定し、外部電極の基板との接合強度(せん断強度)をアイコーエンジニアリング製卓上強度試験機で測定した後、耐ヒートサイクル性試験(―55℃/125℃(30分/30分);250サイクル)後の電気特性及び接合強度を同様に測定した。結果を表2に示す。
Claims (11)
- (A)融点700℃以上の金属粉末、(B)融点300℃超、700℃未満の金属粉末、及び(C)熱硬化性樹脂を含む熱硬化性導電ペースト。
- 成分(B)が、融点300℃超、400℃未満の金属粉末である、請求項1記載の熱硬化性導電ペースト。
- 成分(B)が、融点400℃以上、700℃未満の金属粉末である、請求項1記載の熱硬化性導電ペースト。
- 成分(A)が、Ag、Cu、Ni、Pd、Au及びPt、並びにこれらの合金からなる群から選択される金属粉末である、請求項1〜3のいずれか1項記載の熱硬化性導電ペースト。
- 成分(A)が、
(a)1次粒子の平均粒子径が50〜80nmであり、
(b)結晶子径が20〜50nmであり、かつ
(c)結晶子径に対する平均粒子径の比が1〜4である、
Ag微粉末である、請求項1〜4のいずれか1項記載の熱硬化性導電ペースト。 - 成分(B)が、Sn、In及びBiから選択される1種以上の元素と、Ag、Cu、Ni、Zn、Al、Pd、Au及びPtから選択される1種以上の元素とで構成される合金の金属粉末である、請求項1〜5のいずれか1項記載の熱硬化性導電ペースト。
- 積層セラミック電子部品の外部電極形成用の請求項1〜6のいずれか1項記載の熱硬化性導電ペースト。
- 請求項1〜7のいずれか1項記載の熱硬化性導電ペーストを用いて形成した外部電極を有する積層セラミック部品。
- 請求項1〜7のいずれか1項記載の熱硬化性導電ペーストと、外部電極を設けようとするセラミック複合体とを準備し;
(2)セラミック複合体の内部電極取り出し面に、熱硬化性導電ペーストを印刷又は塗布し、場合により乾燥させ;そして
(3)(2)で得られたセラミック複合体を、80℃〜400℃で、1分〜60分間保持し、外部電極を形成する
ことにより得られる、積層セラミック電子部品。 - 外部電極の表面に、更にNi層を形成し、次いでSn層を形成した、請求項8又は9記載の積層セラミック電子部品。
- 積層セラミック電子部品が、コンデンサ、コンデンサアレイ、サーミスタ、バリスター並びにLC、CR、LR及びLCR複合部品のいずれかである、請求項8〜10のいずれかに1項記載の積層セラミック電子部品。
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JPH0823170A (ja) | 1994-07-07 | 1996-01-23 | Fujitsu Ltd | セラミック多層基板及びその製造方法 |
JPH09129479A (ja) | 1995-11-02 | 1997-05-16 | Murata Mfg Co Ltd | セラミック電子部品 |
EP0933010B1 (en) * | 1996-08-16 | 2002-01-23 | Hugh P. Craig | Printable compositions, and their application to dielectric surfaces used in the manufacture of printed circuit boards |
US7022266B1 (en) * | 1996-08-16 | 2006-04-04 | Dow Corning Corporation | Printable compositions, and their application to dielectric surfaces used in the manufacture of printed circuit boards |
JPH10154417A (ja) | 1996-11-26 | 1998-06-09 | Toyobo Co Ltd | 導電性ペースト |
JPH11307930A (ja) | 1998-04-24 | 1999-11-05 | Namics Corp | 基板およびその製造方法 |
JP2000182883A (ja) | 1998-12-15 | 2000-06-30 | Matsushita Electric Ind Co Ltd | 積層セラミック電子部品の製造方法 |
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JP3534684B2 (ja) * | 2000-07-10 | 2004-06-07 | Tdk株式会社 | 導電ペーストおよび外部電極とその製造方法 |
JP3450839B2 (ja) * | 2000-08-31 | 2003-09-29 | 松下電器産業株式会社 | 導電性接着剤を用いた実装構造体 |
JP4097900B2 (ja) | 2001-01-11 | 2008-06-11 | Tdk株式会社 | 電子部品の製造方法 |
JP2003305588A (ja) | 2002-04-11 | 2003-10-28 | Fujitsu Ltd | 接合材料 |
JP4224772B2 (ja) | 2002-05-17 | 2009-02-18 | 日立化成工業株式会社 | 導電ペースト |
KR100757163B1 (ko) * | 2002-05-31 | 2007-09-07 | 다츠다 덴센 가부시키가이샤 | 도전성 페이스트, 이를 이용한 다층기판과 그 제조방법 |
EP1541654B1 (en) * | 2002-09-04 | 2012-02-29 | Namics Corporation | Conductive adhesive and circuit comprising it |
JPWO2004053901A1 (ja) | 2002-12-09 | 2006-04-13 | 松下電器産業株式会社 | 外部電極を備えた電子部品 |
JP2004208535A (ja) * | 2002-12-27 | 2004-07-29 | Toyoichi Takahashi | 海鼠梅肉混合食品及びその製造方法 |
JP4569109B2 (ja) * | 2004-01-08 | 2010-10-27 | 住友ベークライト株式会社 | 金属含有ペーストおよび半導体装置 |
JP4402504B2 (ja) | 2004-04-21 | 2010-01-20 | アイシン高丘株式会社 | 旋削装置 |
JP2005330529A (ja) * | 2004-05-19 | 2005-12-02 | Dowa Mining Co Ltd | 球状銀粉およびその製造方法 |
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KR101358977B1 (ko) | 2014-02-06 |
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CN101341557B (zh) | 2011-08-17 |
CN101341557A (zh) | 2009-01-07 |
WO2007072894A1 (ja) | 2007-06-28 |
EP1965397B1 (en) | 2019-03-20 |
EP1965397A4 (en) | 2014-08-06 |
JP5180588B2 (ja) | 2013-04-10 |
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