Ceramic material for capacitor
AssigneeTDK Electronics Co., Ltd.
InventorsThorsten Bayer, Michael Schossmann
Life of this patent
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Abstract
The present invention relates to a ceramic material for a multilayer capacitor. The ceramic material has a composition according to the following general formula: Pb(y−1.5a−0.5b+c+0.5d−0.5e−f)CaaAb(Zr1−xTix)(1−c−d−e−d)EcFedNbeWfO3, where A is one or more of the group of Na, K and Ag; E is one or more of the group of Cu, Ni, Hf, Si and Mn; and 0<a<0.14, 0.05≤x≤0.3, 0≤b≤0.12, 0<c≤0.12, 0≤d≤0.12, 0≤e≤0.12, 0≤f≤0.12, 0.9≤y≤1.5 and 0.001<b+c+d+e+f applies. Further, the invention includes a capacitor comprising the described ceramic material.
Claims32
A ceramic material for capacitors in multilayer technology of the general formula:
- Pb(y−1.5a−0.5b+c+0.5d−0.5e−f)CaaAb(Zr1−xTix)(1−c−d−e−d)EcFedNbeWfO3,
- wherein
- A is one or more selected from the group consisting of Na, K and Ag;
- E is Ni;
- and
- 0<a<0.14,
- 0.05≤x≤0.3,
- 0≤b≤0.12,
- 0.001<c<0.12,
- 0≤d≤0.12,
- 0≤e≤0.12,
- 0≤f≤0.12, and
- 0.9≤y≤1.5
- applies.
A capacitor comprising
- dielectric layers made of a ceramic material, and electrode layers disposed therebetween and stacked in a layer order,
- wherein the electrode layers comprise at least first and/or second electrodes, and wherein the ceramic material has the following general formula:
- Pb(y−1.5a−0.5b+c+0.5d−0.5e−f)CaaAb(Zr1−xTix)(1−c−d−e−d)EcFedNbeWfO3,
- wherein
- A is one or more selected from the group consisting of Na, K and Ag;
- E is Ni;
- and
- 0<a<0.14,
- 0.05≤x≤0.3,
- 0≤b≤0.12,
- 0.001<c<0.12,
- 0≤d≤0.12,
- 0≤e≤0.12,
- 0≤f≤0.12, and
- 0.9≤y≤1.5
- applies.
A ceramic material for capacitors in multilayer technology of the general formula:
- Pb(y−1.5a−0.5b+c+0.5d−0.5e−f)CaaAb(Zr1−xTix)(1−c−d−e−d)EcFedNbeWfO3,
- wherein
- A is one or more selected from the group consisting of Na, K and Ag;
- E is Hf;
- and
- 0<a<0.14,
- 0.05≤x≤0.3,
- 0≤b≤0.12,
- 0.001<c<0.12,
- 0≤d≤0.12,
- 0≤e≤0.12,
- 0≤f≤0.12, and
- 0.9≤y≤1.5
- applies.
A capacitor comprising
- dielectric layers made of a ceramic material, and electrode layers disposed therebetween and stacked in a layer order,
- wherein the electrode layers comprise at least first and/or second electrodes, and wherein the ceramic material has the following general formula:
- Pb(y−1.5a−0.5b+c+0.5d−0.5e−f)CaaAb(Zr1−xTix)(1−c−d−e−d)EcFedNbeWfO3,
- wherein
- A is one or more selected from the group consisting of Na, K and Ag;
- E is Hf;
- and
- 0<a<0.14,
- 0.05≤x≤0.3,
- 0≤b≤0.12,
- 0.001<c<0.12,
- 0≤d≤0.12,
- 0≤e≤0.12,
- 0≤f≤0.12, and
- 0.9≤y≤1.5
- applies.
A ceramic material for capacitors in multilayer technology of the general formula:
- Pb(y−1.5a−0.5b+c+0.5d−0.5e−f)CaaAb(Zr1−xTix)(1−c−d−e−d)EcFedNbeWfO3,
- wherein
- A is one or more selected from the group consisting of Na, K and Ag;
- E is one or more selected from the group consisting of Ni, Hf and Si;
- and
- 0<a<0.14,
- 0.05≤x≤0.3,
- 0≤b≤0.12,
- 0.001<c<0.12,
- 0≤d≤0.12,
- 0≤e≤0.12,
- 0≤f≤0.12, and
- 0.9≤y≤1.5
- applies, and
- wherein the ceramic material has an anti-ferroelectric orthorhombic crystalline structure.
A capacitor comprising
- dielectric layers made of a ceramic material, and electrode layers disposed therebetween and stacked in a layer order,
- wherein the electrode layers comprise at least first and/or second electrodes, and wherein the ceramic material has the following general formula:
- Pb(y−1.5a−0.5b+c+0.5d−0.5e−f)CaaAb(Zr1−xTix)(1−c−d−e−d)EcFedNbeWfO3,
- wherein
- A is one or more selected from the group consisting of Na, K and Ag;
- E is one or more selected from the group consisting of Ni, Hf and Si;
- and
- 0<a<0.14,
- 0.05≤x≤0.3,
- 0≤b≤0.12,
- 0.001<c<0.12,
- 0≤d≤0.12,
- 0≤e≤0.12,
- 0≤f≤0.12, and
- 0.9≤y≤1.5
- applies, and
- wherein the ceramic material has an anti-ferroelectric orthorhombic crystalline structure.
Dependencies are inferred from the claim text.