High voltage capacitors
View Patent ↗A capacitor includes a ceramic capacitor body having opposite ends and comprised of a plurality of electrode layers and dielectric layers and first and second external terminals attached to the ceramic capacitor body. The internal active electrodes within the ceramic capacitor body are configured in an alternating manner. Internal electrode shields within the ceramic capacitor body are used to assist in providing resistance to arc-over. The shields can include a top internal electrode shield and an opposite bottom internal electrode shield wherein the top internal electrode shield and the opposite bottom internal electrode shield are on opposite sides of the plurality of internal active electrodes and each internal electrode shield extends inwardly to or beyond a corresponding external terminal to thereby provide shielding. Side shields are used. The capacitor provides improved resistance to arc-over, high voltage breakdown in air, and allows for small case size.
1. A multilayer ceramic capacitor component comprising:
a ceramic capacitor body having opposite ends and comprised of a plurality of electrode layers and dielectric layers;
first and second external terminals attached to the ceramic capacitor body;
a plurality of internal active electrodes within the ceramic capacitor body configured in an alternating manner such that a first of the plurality of internal active electrodes extends from one end of the ceramic capacitor body inwardly and a next internal active electrode extends from an opposite end of the ceramic capacitor body inwardly;
a plurality of internal electrode shields within the ceramic capacitor body to thereby assist in providing resistance to arc-over;
the plurality of internal electrode shields comprising a top internal electrode shield and an opposite bottom internal electrode shield wherein the top internal electrode shield and the opposite bottom internal electrode shield are on opposite sides of the plurality of internal active electrodes and each internal electrode shield extends inwardly to or beyond a corresponding external terminal to thereby provide shielding;
the plurality of internal electrode shields further comprising a plurality of side shields, each side shield extending inwardly from one end of the capacitor body and the side shields configured to further shield an active electrode to thereby further resist arc over between active electrodes and terminals.
2. The multilayer ceramic capacitor component of claim 1 wherein each of the plurality of internal active electrodes extends from one end of the ceramic capacitor body substantially to the external electrode attached to the opposite end of the ceramic capacitor body.
3. The multilayer ceramic capacitor component of claim 1 wherein the voltage breakdown for the multilayer ceramic capacitor is greater than 1500 volts.
4. The multilayer ceramic capacitor component of claim 1 wherein the voltage breakdown for the multilayer ceramic capacitor is greater than 2000 volts.
5. The multilayer ceramic capacitor component of claim 1 wherein the voltage breakdown for the multilayer ceramic capacitor is greater than 2500 volts.
6. The multilayer ceramic capacitor component of claim 1 wherein the voltage breakdown for the multilayer ceramic capacitor is greater than 3000 volts.
7. A multilayer ceramic capacitor component for providing improved high voltage characteristics, comprising:
a ceramic capacitor body having opposite ends and comprised of a plurality of electrode layers and dielectric layers;
first and second external terminals attached to the ceramic capacitor body;
wherein the plurality of electrode layers comprise a top layer having an electrode shield extending inwardly to or beyond the first terminal, a bottom layer having an electrode shield extending inwardly to or beyond the second terminal, and a plurality of alternating layers of active electrodes extending inwardly from alternating ends of the ceramic capacitor body; and
wherein each of the plurality of alternating layers of active electrodes further comprises side shields.
8. The multilayer ceramic capacitor component of claim 7 wherein the voltage breakdown for the multilayer ceramic capacitor is greater than 1500 volts.
9. The multilayer ceramic capacitor component of claim 7 wherein the voltage breakdown for the multilayer ceramic capacitor is greater than 2000 volts.
10. The multi layer ceramic capacitor component of claim 7 wherein the voltage breakdown for the multilayer ceramic capacitor is greater than 2500 volts.
11. The multilayer ceramic capacitor component of claim 7 wherein the voltage breakdown for the multilayer ceramic capacitor is greater than 3000 volts.
12. The multilayer ceramic capacitor component of claim 7 wherein the ceramic capacitor body being sized to fit within case size 1206 packaging.
13. A method of manufacturing a multilayer ceramic component, comprising:
forming a ceramic capacitor body from a plurality of electrode layers and dielectric layers;
attaching first and second external terminals on opposite ends of the ceramic capacitor body;
wherein the plurality of electrode layers comprises layers of active electrodes and layers of shielding electrodes and wherein the layers of active electrodes being configured in an alternating manner such that a first of the plurality of active electrodes extends from one end of the ceramic capacitor body inwardly and a next internal active electrode extends from an opposite end of the ceramic capacitor body inwardly;
wherein the layers of shielding electrodes comprise a top internal electrode shield and an opposite bottom internal electrode shield wherein the top internal electrode shield and the opposite bottom internal electrode shield are on opposite sides of the plurality of active electrodes and each electrode shield extends inwardly to or beyond a corresponding external terminal to thereby provide shielding;
wherein the layers of active electrodes further comprise layers of side shields on opposite sides of the active electrodes to thereby provide additional shielding.
14. A multilayer ceramic capacitor component comprising:
a ceramic capacitor body having opposite ends and comprised of a plurality of electrode layers and dielectric layers;
first and second external terminals attached to the ceramic capacitor body;
a plurality of internal active electrodes within the ceramic capacitor body configured in an alternating manner such that a first of the plurality of internal active electrodes extends from one end of the ceramic capacitor body inwardly and a next internal active electrode extends from an opposite end of the ceramic capacitor body inwardly;
a plurality of internal electrode shields within the ceramic capacitor body to thereby assist in providing resistance to arc-over;
the plurality of internal electrode shields comprising a plurality of side shields, each side shield extending inwardly from one end of the capacitor body and the side shields configured to shield a corresponding active electrode to thereby resist arc over between active electrodes and terminals.
15. The multilayer ceramic capacitor component of claim 14 wherein the plurality of internal electrode shields further comprises a top internal electrode shield and an opposite bottom internal electrode shield wherein the top internal electrode shield and the opposite bottom internal electrode shield are on opposite sides of the plurality of internal active electrodes and each internal electrode shield extends inwardly to or beyond a corresponding external terminal to thereby provide shielding.
16. A method of manufacturing a multilayer ceramic component, comprising:
forming a ceramic capacitor body from a plurality of electrode layers and dielectric layers;
attaching first and second external terminals on opposite ends of the ceramic capacitor body;
wherein the plurality of electrode layers comprises layers of active electrodes and layers of shielding electrodes and wherein the layers of active electrodes being configured in an alternating manner such that a first of the plurality of active electrodes extends from one end of the ceramic capacitor body inwardly and a next internal active electrode extends from an opposite end of the ceramic capacitor body inwardly;
wherein the layers of active electrodes further comprise layers of side shields on opposite sides of the active electrodes to thereby provide shielding.