Multi-layer capacitor package
View Patent ↗The present invention provides a substrate assembly includes at least two ceramic layers, at least two layers of one or more electrodes, at least one high dielectric constant layer, two or more holes, electrically conductive structures formed in the two or more holes, and the electrically conductive structure is physically connected to at least one of the electrodes, thereby forming a set, wherein each of the sets if physically separated from at least one of the other sets. A process includes cutting ceramic sheets, removing material from the ceramic sheets to form holes, depositing a metallic material into the holes, depositing the metallic material to form electrodes, selectively depositing a thin layer of high dielectric constant material, and firing the ceramic sheets, the metallic material, the high dielectric constant material layer, and the electrodes.
1. A substrate assembly comprising:
a first ceramic layer;
a first layer of one or more electrodes connected to the ceramic layer;
a high dielectric constant layer connected to the first layer of one or more electrodes,
wherein the high dielectric constant layer is composed of different material than the ceramic layer;
a second layer of one or more electrodes connected to the high dielectric constant layer
wherein the high dielectric constant layer is composed of direct contact with the first layer of one or more electrodes and the second layer of one or more electrodes;
a second ceramic layer connected to the second layer of one or more electrodes,
wherein the second ceramic layer is a different material than the high dielectric constant layer;
two or more holes, wherein each of the two or more holes is formed through at least one ceramic layer, at least one layer of one or more electrodes, and at least one high dielectric constant layer; and
electrically conductive structures formed in the two or more holes,
wherein each of the electrically conductive structures is physically connected to at least one of the electrodes, thereby forming sets,
wherein each of the sets is physically separated from at least one of the other sets.
2. The substrate assembly of claim 1 further comprising at least one additional layer of one or more electrodes, and one additional high dielectric constant layer.
3. The substrate assembly of claim 2 further comprising at least one additional ceramic layer.
4. The substrate assembly of claim 1 , wherein the high dielectric constant layer has a thickness ranging from 1 μm to 10 μm.
5. The substrate assembly of claim 1 , wherein the high dielectric constant layer is selected from the group consisting of strontium titanate and barium titanate.
6. The substrate assembly of claim 1 further comprising an electrically conductive surface pad at a termination of the two or more holes.
7. The substrate assembly of claim 1 wherein the high dielectric constant layer is the only material between the first layer of one or more electrodes and the second layer of one or more electrodes.