JP6458863B2 - 低温焼結セラミック材料、セラミック焼結体およびセラミック電子部品 - Google Patents
低温焼結セラミック材料、セラミック焼結体およびセラミック電子部品 Download PDFInfo
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Description
SiをSiO2に換算して70重量部以上かつ80重量部以下と、
BaをBaOに換算して10重量部以上かつ20重量部以下と、
AlをAl2O3に換算して3重量部以上かつ7重量部以下と、
MnをMnOに換算して2重量部と、
BをB2O3に換算して2重量部と、
LiをLi2Oに換算して0.4重量部と、
を含むことを特徴としている。
SiをSiO2に換算して70重量部以上かつ80重量部以下と、
BaをBaOに換算して10重量部以上かつ20重量部以下と、
AlをAl2O3に換算して3重量部以上かつ7重量部以下と、
MnをMnOに換算して2重量部と、
BをB2O3に換算して2重量部と、
LiをLi2Oに換算して0.4重量部と、
を含むことを特徴としている。
SiをSiO2に換算して70重量部以上かつ80重量部以下と、
BaをBaOに換算して10重量部以上かつ20重量部以下と、
AlをAl2O3に換算して3重量部以上かつ7重量部以下と、
MnをMnOに換算して2重量部と、
BをB2O3に換算して2重量部と、
LiをLi2Oに換算して0.4重量部と、
を含むことを特徴としている。
SiをSiO2に換算して70重量部以上かつ80重量部以下と、
BaをBaOに換算して10重量部以上かつ20重量部以下と、
AlをAl2O3に換算して3重量部以上かつ7重量部以下と、
MnをMnOに換算して2重量部と、
BをB2O3に換算して2重量部と、
LiをLi2Oに換算して0.4重量部と、
を含む組成を有していることを特徴としている。
(フィラー原料およびガラスの作製)
次に、表2および表3に示した各試料に係る調合粉末に、溶剤、バインダおよび可塑剤を加え、十分に混合し、ドクターブレード法を適用することによって、セラミックグリーンシートを得た。
次に、上記セラミックグリーンシート上に、Cuを導電成分とする導電性ペーストを印刷し、電極となるべき導電性ペースト膜を形成した。
上記の焼成工程を経て得られた各試料に係る焼結体について、表4に示すように、その「焼結性」、「比誘電率」、および「機械強度」を評価した。なお、「焼結性」は、焼結体をインクに浸漬し、焼結体へのインクの染み具合を目視にて観察し、その結果から、緻密に焼結しているかを判断したもので、表4において、緻密であった場合に「○」と表示し、そうでない場合に「×」と表示した。「焼結性」が「×」であると評価した試料については、「比誘電率」および「機械強度」を測定しなかった。また、「機械強度」は、3点曲げによる抗折強度を測定したものである。
(フィラー原料およびガラスの作製)
実験例2で作製した試料は、すべて、この発明の範囲外の参考例である。
次に、表5に示した各試料に係る調合粉末に、溶剤、バインダおよび可塑剤を加え、十分に混合し、ドクターブレード法を適用することによって、セラミックグリーンシートを得た。
次に、上記セラミックグリーンシート上に、Cuを導電成分とする導電性ペーストを印刷し、電極となるべき導電性ペースト膜を形成した。
上記の焼成工程を経て得られた各試料に係る焼結体について、表6に示すように、実験例1の場合と同様の要領で、その「焼結性」、「比誘電率」、および「機械強度」を評価し、実験例1の場合と同様の要領で表示した。
2 セラミック層
3,23 積層体
4,5 外部導体膜
6 内部導体膜
7 ビア導体
26〜31 外部端子電極
Claims (9)
- SiをSiO2に換算して70重量部以上かつ80重量部以下と、
BaをBaOに換算して10重量部以上かつ20重量部以下と、
AlをAl2O3に換算して3重量部以上かつ7重量部以下と、
MnをMnOに換算して2重量部と、
BをB2O3に換算して2重量部と、
LiをLi2Oに換算して0.4重量部と、
を含む、低温焼結セラミック材料。 - SiをSiO2に換算して70重量部以上かつ80重量部以下と、
BaをBaOに換算して10重量部以上かつ20重量部以下と、
AlをAl2O3に換算して3重量部以上かつ7重量部以下と、
MnをMnOに換算して2重量部と、
BをB2O3に換算して2重量部と、
LiをLi2Oに換算して0.4重量部と、
を含む、セラミック焼結体。 - ガラス、ならびに、結晶相として、少なくともクオーツ(SiO2)およびセルシアン(BaAl2Si2O8)を含み、
粉末X線回折測定において、前記セルシアンの2θ(Cu−Kα)=13.5°のピーク強度をPc、前記クオーツの2θ(Cu−Kα)=50.0°のピーク強度をPqとしたとき、Pq/Pcで表わされるピーク強度比が2.2以上かつ5.3以下である、
請求項2に記載のセラミック焼結体。 - ガラス、ならびに、結晶相として、少なくともクオーツ(SiO2)およびサンボルナイト(BaSi2O5)を含み、
粉末X線回折測定において、前記サンボルナイトの2θ(Cu−Kα)=28.80°のピーク強度をPs、前記クオーツの2θ(Cu−Kα)=50.0°のピーク強度をPqとしたとき、Pq/Psで表わされるピーク強度比が0.022以上かつ0.452以下である、
請求項2に記載のセラミック焼結体。 - 請求項2ないし4のいずれかに記載のセラミック焼結体からなるセラミック層を備える、セラミック電子部品。
- 積層された複数の前記セラミック層を含む積層体と、前記積層体の表面および内部の少なくとも一方に設けられた導体と、を備える、請求項5に記載のセラミック電子部品。
- 当該セラミック電子部品は多層配線基板である、請求項6に記載のセラミック電子部品。
- 当該セラミック電子部品はカプラである、請求項6に記載のセラミック電子部品。
- 前記導体はCuを含む、請求項6ないし8のいずれかに記載のセラミック電子部品。
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