Multi-terminal MLCC for improved heat dissipation

Patent metadata

Field	Value
Publication number	US-12249463-B2
Application number	US-202117233796-A
Country	US
Kind code	B2
Filing date	Apr 19, 2021
Priority date	Apr 20, 2020
Publication date	Mar 11, 2025
Grant date	Mar 11, 2025

Abstract

Provided is a heat dissipating capacitor comprising internal electrodes of opposing polarity forming a capacitive couple between external terminations. A dielectric is between the internal electrodes. The heat dissipating capacitor comprises at least one thermal dissipation layer and at least one thermal conductive termination wherein the thermal dissipation layer is in thermally conductive contact with the thermal conductive termination.

First claim

The invention claimed is:

1. A heat dissipating electronic device comprising:
internal electrodes of opposing polarity forming a capacitive couple between external terminations wherein said internal electrodes are in coplanar pairs of opposing polarity;
a dielectric between said internal electrodes;
at least one thermal dissipation layer wherein said at least one thermal dissipation layer is between adjacent said coplanar pairs;
at least one thermal conductive terminal wherein said at least one thermal dissipation layer is in electrically conductive contact with said thermal conductive terminal and said thermal conductive terminal is not in electrical contact with said external terminations, and said thermal conductive terminal does not contribute to electrical functionality of said capacitive couple wherein said thermal conductive termination is in thermal conductive contact with a thermal dissipation trace wherein said thermal dissipation trace does not contribute to electrical functionality of said capacitive couple; and
a substrate comprising active traces and said thermal dissipation trace wherein said active traces are in electrical contact with said external terminations.

2. A heat dissipating electronic device of claim 1 comprising multiple thermal dissipation layers.

3. A heat dissipating electronic device of claim 2 wherein two said thermal dissipation layers are adjacent thermal dissipation layers.

4. A heat dissipating electronic device of claim 3 wherein said dielectric is between said adjacent thermal dissipation layers.

5. A heat dissipating electronic device of claim 3 wherein said adjacent thermal dissipation layers do not have an inner electrode between said adjacent thermal dissipation layers.

6. A heat dissipating electronic device of claim 2 wherein two said thermal dissipation layers have an inner electrode between said thermal dissipation layers.

7. A heat dissipating electronic device of claim 1 wherein said at least one thermal dissipation layer is external to said capacitive couple.

8. A heat dissipating electronic device of claim 1 wherein said at least one thermal dissipation layer has at least one inner electrode on each side of said thermal dissipation layer.

9. A heat dissipating electronic device of claim 1 wherein said at least one thermal dissipation layer is a continuous thermal dissipation layer or a discontinuous thermal dissipation layer.

10. A heat dissipating electronic device of claim 1 further comprising a second thermal conductive termination.

11. A heat dissipating electronic device of claim 10 wherein said thermal conductive termination and said second thermal conductive termination are in thermally conductive contact with said at least one thermal dissipation layer.

12. A heat dissipating electronic device of claim 10 wherein said second thermal conductive termination is in thermally conductive contact with a second thermal dissipation layer.

13. A heat dissipating electronic device of claim 1 further comprising at least one of a shield electrode or a floating electrode.

14. A heat dissipating electronic device of claim 1 wherein said thermal conductive termination is an insulator.

15. A heat dissipating electronic device of claim 1 further comprising a coating.

16. A heat dissipating electronic device of claim 1 wherein said at least one thermal dissipation layer comprises at least one material selected from the group consisting of aluminum nitride, beryllium oxide, nickel, tungsten, gold, copper, silver and aluminum.

17. A heat dissipating electronic device of claim 16 wherein said thermal dissipation termination comprises at least one material selected from the group consisting of aluminum nitride, nickel, tungsten, gold, copper, silver and aluminum.

18. A heat dissipating electronic device of claim 1 wherein said dielectric comprises barium titanate, calcium zirconate or combinations of these.

19. A heat dissipating electronic device of claim 1 further comprising at least one capacitor.

20. A heat dissipating electronic device comprising:
internal electrodes of opposing polarity forming a capacitive couple between external terminations;
a dielectric between said internal electrodes;
at least one thermal dissipation layer wherein said at least one thermal dissipation layer is not coplanar with an internal electrode of said internal electrodes wherein said at least one thermal dissipation layer has a thickness of no more than 5 times the thickness of said inner electrodes and wherein said at least one thermal dissipation layer is coplanar with at least one inner electrode of said internal electrodes and between coplanar said internal electrodes and wherein said thermal dissipation layer is in thermal conductive contact with a thermal dissipation trace wherein said thermal dissipation trace is not electrically connected to said capactive couple;
at least one thermal conductive termination wherein said at least one thermal dissipation layer is in electrically conductive contact with said thermal conductive termination and said at least one thermal dissipation layer is in not in electrical contact with said external terminations; and
a substrate comprising active traces and said thermal dissipation trace wherein said active traces are in electrical contact with said external terminations.

21. A heat dissipating electronic device of claim 20 comprising multiple thermal dissipation layers.

22. A heat dissipating electronic device of claim 21 wherein two said thermal dissipation layers are adjacent thermal dissipation layers.

23. A heat dissipating electronic device of claim 22 wherein said dielectric is between said adjacent thermal dissipation layers.

24. A heat dissipating electronic device of claim 22 wherein said adjacent thermal dissipation layers do not have an inner electrode between said adjacent thermal dissipation layers.

25. A heat dissipating electronic device of claim 21 wherein said thermal dissipation layers have an inner electrode between said thermal dissipation layers.

26. A heat dissipating electronic device of claim 20 wherein said at least one thermal dissipation layer is external to said capacitive couple.

27. A heat dissipating electronic device of claim 20 wherein said at least one thermal dissipation layer is has at least one inner electrode on each side of said at least one thermal dissipation layer.

28. A heat dissipating electronic device of claim 20 wherein said at least one thermal dissipation layer is selected from a continuous thermal dissipation layer or a discontinuous thermal dissipation layer.

29. A heat dissipating electronic device of claim 20 further comprising a second thermal conductive termination.

30. A heat dissipating electronic device of claim 29 wherein said thermal conductive termination and said second thermal conductive termination are in thermally conductive contact with said at least one thermal dissipation layer.

31. A heat dissipating electronic device of claim 29 wherein said second thermal conductive termination is in thermally conductive contact with a second thermal dissipation layer.

32. A heat dissipating electronic device of claim 20 further comprising at least one of a shield electrode or a floating electrode.

33. A heat di

Assignees

• Kemet Electronics Corp

Inventors

• Laps Mark R
• Bultitude John
• Lessner Philip M
• Jones Lonnie G
• Templeton Allen
• Reed Nathan A

Classifications

• H01G4/012

  Form of non-self-supporting electrodes · CPC title

• H01G4/1227

  based on alkaline earth titanates · CPC title

• H01G4/232

  electrically connecting two or more layers of a stacked or rolled capacitor · CPC title

• H01G4/1236

  based on zirconium oxides or zirconates (H01G4/1263 takes precedence) · CPC title

• H01G4/38

  Multiple capacitors, i.e. structural combinations of fixed capacitors · CPC title