JP3924286B2 - 積層セラミック電子部品の製造方法 - Google Patents
積層セラミック電子部品の製造方法 Download PDFInfo
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- JP3924286B2 JP3924286B2 JP2004021582A JP2004021582A JP3924286B2 JP 3924286 B2 JP3924286 B2 JP 3924286B2 JP 2004021582 A JP2004021582 A JP 2004021582A JP 2004021582 A JP2004021582 A JP 2004021582A JP 3924286 B2 JP3924286 B2 JP 3924286B2
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Description
誘電体層用ペーストと、卑金属を含む内部電極層用ペーストとが交互に複数配置された積層体を焼成する焼成工程と、
該焼成後の積層体を、温度T1でアニール処理する第1アニール工程と、
該第1アニール後の積層体を、温度T1より高い温度T2でアニール処理する第2アニール工程とを、有する積層セラミック電子部品の製造方法が提供される。
誘電体層用ペーストと、卑金属を含む内部電極層用ペーストとが交互に複数配置された積層体を焼成する焼成工程と、
該焼成後の積層体を、600〜900℃の温度T1でアニール処理する第1アニール工程と、
該第1アニール後の積層体を、900〜1200℃(但し、900℃を除く)の温度T2でアニール処理する第2アニール工程とを、有する積層セラミック電子部品の製造方法が提供される。
たとえば、雰囲気温度を焼成保持温度から下げる前記焼成工程の降温工程の前記雰囲気温度を、前記温度T1と同じ温度にまで下げて、前記第1アニール工程を行い、その後前記第2アニール工程を行う。
また、焼成工程の降温工程の雰囲気温度を、前記温度T1より低く、かつ室温より高い温度にまで下げた後、雰囲気温度を上げて、前記第1アニール工程を行い、その後前記第2アニール工程を行う。
たとえば、焼成工程の降温工程の終了後に、雰囲気温度を上げ、前記第1アニール工程を行い、その後前記第2アニール工程を行う。
{(Sr1−x Cax )O}m ・(Ti1−y Zry )O2 で示され、xが0≦x≦1.00、yが0≦y≦0.20、mが0.94<m<1.02である組成の誘電体酸化物を含む主成分原料と、
該主成分原料100モルに対する含有量が酸化物中のMn換算で4モル未満のMnの酸化物、
主成分原料100モルに対する含有量が希土類元素換算で0.02〜2モル(但し、2モルを除く)のSc、Y及びランタノイド元素で構成される希土類元素の酸化物、
主成分原料100モルに対する含有量が0.01〜2モル(但し、2モルを除く)のV、Nb、W、TaおよびMoの酸化物から選ばれる一つ以上、及び
主成分原料100モルに対する含有量が酸化物換算で0〜15モル(但し、0モルと15モルを除く)の、SiO2 、MO(ただし、Mは、Ba、Ca、SrおよびMgから選ばれる少なくとも1種の元素)、Li2 OおよびB2 O3 から選ばれる一つ以上、を含む副成分原料とを、有する
誘電体層用ペーストを用いる。
〔(Cax Sr1−x )O〕m 〔(Tiy Zr1−y )O2 〕で示され、x、y、mは、0≦x≦1、0≦y≦0.10、0.75≦m≦1.04である組成の誘電体酸化物を含む主成分原料と、
該主成分原料100モルに対する含有量がMnOに換算して0.2〜5モルであるMnの酸化物、
主成分原料100モルに対する含有量がAl2 O3 に換算して0.1〜10モルであるAlの酸化物、
〔(Baz Ca1−z )O〕v SiO2 で表され、z、vが、0≦z≦1、0.5≦v≦4.0である複合酸化物を含み、主成分原料100モルに対する含有量が0.5〜15モルである複合酸化物、及び
主成分原料100モルに対する含有量が0.02〜1.5モルの希土類元素、Nb,Mo,TaおよびWの酸化物から選ばれる一つ以上、を含む副成分原料とを、有する
誘電体層用ペーストを用いる。
{(Ca1−x Mex )O}m ・(Zr1−y Tiy )O2 で示され、MeがSr、MgおよびBaの一つ以上であり、xが0≦x≦1.00、yが0.1≦y≦0.8、mが0.8≦m≦1.3である組成の誘電体酸化物を含む主成分原料と、
該主成分原料100モルに対する含有量がV2 O5 換算で0〜7モル(但し、0モルと7モルを除く)のVの酸化物、
主成分原料100モルに対する含有量がAl2 O3 換算で0〜15モル(但し、0モルと15モルを除く)のAlの酸化物、
主成分原料100モルに対する含有量が酸化物中のMn換算で0〜5モル(但し、0モルと5モルを除く)のMnの酸化物、
主成分原料100モルに対する含有量が酸化物換算で0〜20モル(但し、0モルと20モルを除く)の、SiO2 、MO(ただし、Mは、Ba、Ca、SrおよびMgから選ばれる少なくとも1種の元素)、Li2 OおよびB2 O3 から選ばれる一つ以上、及び
希土類元素の酸化物、を含む副成分原料とを、有する
誘電体層用ペーストを用いる。
図1は本発明の一実施形態に係る積層セラミックコンデンサの断面図、
図2〜4は本発明の一実施形態に係る焼成、第1アニール及び第2アニールの各温度変化を示すグラフ、である。
降温速度は、好ましくは50〜500℃/時間、より好ましくは100〜300℃/時間である。
降温速度は、好ましくは50〜500℃/時間、より好ましくは100〜300℃/時間である。
まず、誘電体層用ペーストを次に示すようにして作製した。
次いで、上記誘電体層用ペーストを用いてPETフィルム上に、厚さ10μmのグリーンシートを形成し、この上に内部電極層用ペーストを所定パターンで印刷したのち、PETフィルムからグリーンシートを剥離した。
昇温速度:50℃/時間、
保持温度:280℃、
保持時間:8時間、
雰囲気:空気中。
降温速度:50℃/時間、
降温温度:室温(25℃)。
昇温速度:200℃/時間、
保持温度:1250℃、
保持時間:2時間、
雰囲気:加湿した窒素と水素の混合ガスの雰囲気(H2 :5容量%、酸素分圧=10−6Pa)、
降温速度:300℃/時間、
降温温度:室温(25℃)。
昇温速度:200℃/時間、
保持温度T1:各表参照、
保持時間:2時間、
雰囲気:加湿した窒素ガス(酸素分圧=10−4Pa)。
降温速度:200℃/時間、
降温温度:室温(25℃)。
昇温速度:200℃/時間、
保持温度T2:各表参照、
保持時間:2時間、
雰囲気:加湿した窒素ガス(酸素分圧=10−3Pa)。
降温速度:200℃/時間、
降温温度:室温(25℃)。
得られたコンデンサ試料の高温負荷寿命(HALT)、誘電損失(tanδ)、構造欠陥(導通不良率)をそれぞれ評価した。結果を表1〜2に示す。
10… コンデンサ素子本体
2… 誘電体層
3… 内部電極層
4… 外部電極
Claims (7)
- {(Sr 1−x Ca x )O} m ・(Ti 1−y Zr y )O 2 で示され、xが0≦x≦1.00、yが0≦y≦1.00、mが0.75≦m≦1.3である組成の誘電体酸化物を含む主成分原料と、Mnを含む副成分原料を有する誘電体層用ペーストと、卑金属を含む内部電極層用ペーストとが交互に複数配置された積層体を焼成する焼成工程と、
該焼成後の積層体を、600〜900℃の温度T1でアニール処理する第1アニール工程と、
該第1アニール後の積層体を、900〜1200℃(但し、900℃を除く)の温度T2でアニール処理する第2アニール工程とを、有し、
前記T2と前記T1の差(T2−T1)が、50℃以上である積層セラミック電子部品の製造方法。 - 雰囲気温度を焼成保持温度から下げる前記焼成工程の降温工程の前記雰囲気温度を、前記温度T1と同じ温度にまで下げて、前記第1アニール工程を行い、その後前記第2アニール工程を行う、請求項1に記載の積層セラミック電子部品の製造方法。
- 雰囲気温度を焼成保持温度から下げる前記焼成工程の降温工程の前記雰囲気温度を、前記温度T1より低く、かつ室温より高い温度にまで下げた後、雰囲気温度を上げて、前記第1アニール工程を行い、その後前記第2アニール工程を行う、請求項1に記載の積層セラミック電子部品の製造方法。
- 雰囲気温度を焼成保持温度から下げる前記焼成工程の降温工程の終了後に、雰囲気温度を上げ、前記第1アニール工程を行い、その後前記第2アニール工程を行う、請求項1に記載の積層セラミック電子部品の製造方法。
- 前記第1アニール工程において、前記温度T1に向かう昇温速度が、50〜500℃/時間である請求項1に記載の積層セラミック電子部品の製造方法。
- 前記第2アニール工程において、前記温度T2に向かう昇温速度が、50〜500℃/時間である請求項1に記載の積層セラミック電子部品の製造方法。
- 前記第1アニール工程を10−7〜0.1Paの酸素分圧で行い、前記第2アニール工程を10−5〜10Paの酸素分圧で行う、請求項1〜6のいずれかに記載の積層セラミック電子部品の製造方法。
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CN116332626A (zh) * | 2023-02-15 | 2023-06-27 | 中国振华集团云科电子有限公司 | 一种高温稳定型陶瓷粉及其陶瓷基板的制备方法 |
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US5336532A (en) * | 1989-02-21 | 1994-08-09 | Dow Corning Corporation | Low temperature process for the formation of ceramic coatings |
US5508226A (en) * | 1991-12-13 | 1996-04-16 | Symetrix Corporation | Low temperature process for fabricating layered superlattice materialsand making electronic devices including same |
JP3316717B2 (ja) | 1994-06-23 | 2002-08-19 | 株式会社村田製作所 | 積層セラミックコンデンサ |
US6510040B1 (en) * | 1999-11-01 | 2003-01-21 | Tdk Corporation | Multilayer ceramic electronic component |
JP3417931B2 (ja) | 2000-03-30 | 2003-06-16 | ティーディーケイ株式会社 | 誘電体磁器組成物の製造方法および電子部品の製造方法 |
KR100390837B1 (ko) | 2000-12-18 | 2003-07-10 | 주식회사 하이닉스반도체 | 캐패시터 제조 방법 |
US6887716B2 (en) * | 2000-12-20 | 2005-05-03 | Fujitsu Limited | Process for producing high quality PZT films for ferroelectric memory integrated circuits |
US6674633B2 (en) * | 2001-02-28 | 2004-01-06 | Fujitsu Limited | Process for producing a strontium ruthenium oxide protective layer on a top electrode |
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US7037831B2 (en) | 2006-05-02 |
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TWI241604B (en) | 2005-10-11 |
TW200519988A (en) | 2005-06-16 |
JP2005159254A (ja) | 2005-06-16 |
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