Multilayer ceramic capacitor having ultra-broadband performance

Patent metadata

Field	Value
Publication number	US-11495406-B2
Application number	US-202016751299-A
Country	US
Kind code	B2
Filing date	Jan 24, 2020
Priority date	Jan 28, 2019
Publication date	Nov 8, 2022
Grant date	Nov 8, 2022

Abstract

The present invention is directed to a multilayer ceramic capacitor that includes a plurality of active electrodes and at least one shield electrode that are each arranged within a monolithic body and parallel with a longitudinal direction. The capacitor may exhibit a first insertion loss value at a test frequency, which may be greater than about 2 GHz, in a first orientation relative to the mounting surface. The capacitor may exhibit a second insertion loss value at about the test frequency in a second orientation relative to the mounting surface and the capacitor is rotated 90 degrees or more about the longitudinal direction with respect to the first orientation. The longitudinal direction of the capacitor may be parallel with the mounting surface in each of the first and second orientations. The second insertion loss value may differ from the first insertion loss value by at least about 0.3 dB.

First claim

What is claimed is:

1. A broadband multilayer ceramic capacitor having a first end and a second end that is spaced apart from the first end in a longitudinal direction that is perpendicular to a lateral direction, the lateral direction and longitudinal direction each being perpendicular to a Z-direction, the broadband multilayer ceramic capacitor comprising:
a monolithic body comprising a plurality of dielectric layers;
a first external terminal disposed along the first end;
a second external terminal disposed along the second end;
a plurality of active electrodes arranged within the monolithic body and parallel with the longitudinal direction; and
at least one shield electrode arranged within the monolithic body and parallel with the longitudinal direction;
wherein the broadband multilayer ceramic capacitor exhibits:
a first insertion loss value at a test frequency and in a first orientation relative to the mounting surface in which the longitudinal direction of the multilayer ceramic capacitor is parallel with the mounting surface, the test frequency being greater than about 2 GHz; and
a second insertion loss value at about the test frequency in a second orientation relative to the mounting surface in which the longitudinal direction of the multilayer ceramic capacitor is parallel with the mounting surface and the broadband multilayer ceramic capacitor is rotated 90 degrees or more about the longitudinal direction with respect to the first orientation, and wherein the second insertion loss value differs from the first insertion loss value by at least about 0.3 dB.

2. The broadband multilayer ceramic capacitor of claim 1 , wherein the plurality of active electrodes are parallel with the mounting surface in the first orientation.

3. The broadband multilayer ceramic capacitor of claim 1 , wherein, in the second orientation relative to the mounting surface, the multilayer ceramic capacitor is rotated 180 degrees about the longitudinal direction with respect to the first orientation relative to the mounting surface.

4. The broadband multilayer ceramic capacitor of claim 1 , wherein, in the second orientation relative to the mounting surface, the multilayer ceramic capacitor is rotated 90 degrees about the longitudinal direction with respect to the first orientation relative to the mounting surface.

5. The broadband multilayer ceramic capacitor of claim 1 , wherein the broadband multilayer ceramic capacitor exhibits an insertion loss in the first orientation that is greater than about −0.4 dB at about 10 GHz.

6. The broadband multilayer ceramic capacitor of claim 1 , wherein the broadband multilayer ceramic capacitor exhibits an insertion loss in the first orientation that is greater than about −0.4 dB at about 20 GHz.

7. The broadband multilayer ceramic capacitor of claim 1 , wherein the broadband multilayer ceramic capacitor exhibits an insertion loss in the first orientation that is greater than about −0.45 dB at about 30 GHz.

8. The broadband multilayer ceramic capacitor of claim 1 , wherein the broadband multilayer ceramic capacitor exhibits an insertion loss in the first orientation that ranges from about −0.05 dB to about −0.4 dB from about 5 GHz to about 20 GHz.

9. The broadband multilayer ceramic capacitor of claim 1 , wherein the broadband multilayer ceramic capacitor exhibits an insertion loss in the first orientation that ranges from about −0.05 dB to about −0.5 dB from about 20 GHz to about 40 GHz.

10. The broadband multilayer ceramic capacitor of claim 1 , wherein, in the first orientation, the at least one shield electrode is closer to the mounting surface in the Z-direction than the plurality of active electrodes.

11. The broadband multilayer ceramic capacitor of claim 1 , wherein, in the first orientation, the broadband multilayer ceramic capacitor is free of shield electrodes above the plurality of active electrode layers in the Z-direction.

12. The broadband multilayer ceramic capacitor of claim 1 , wherein, in the first orientation, the broadband multilayer ceramic capacitor is free of shield electrodes above a lowest electrode layer of the plurality of active electrode layers in the Z-direction.

13. The broadband multilayer ceramic capacitor of claim 1 , wherein the at least one shield electrode comprises:
a first shield electrode that is parallel with the longitudinal direction, the first shield electrode connected with the first external terminal, the first shield electrode having a first longitudinal edge aligned with the lateral direction and facing away from the first external terminal, wherein the first shield electrode has a second longitudinal edge aligned with the lateral direction and facing away from the first external terminal, and wherein the second longitudinal edge is offset in the longitudinal direction from the first longitudinal edge by a shield electrode offset distance; and
a second shield electrode connected with the second external terminal, the second shield electrode being approximately aligned with the first shield electrode in the Z-direction.

14. The broadband multilayer ceramic capacitor of claim 13 , wherein the capacitor has a capacitor length in the longitudinal direction between the first end and the second end of the capacitor, and wherein a ratio of the capacitor length to the shield electrode offset distance is greater than about 2.

15. The broadband multilayer ceramic capacitor of claim 13 , wherein the second shield electrode has a first longitudinal edge aligned with the lateral direction and facing away from the second external terminal, wherein the second shield electrode has a second longitudinal edge aligned with the lateral direction and facing away from the second external terminal, and wherein the second longitudinal edge is offset in the longitudinal direction from the first longitudinal edge by approximately the shield electrode offset distance.

16. The broadband multilayer ceramic capacitor of claim 15 , wherein a first shield gap distance is formed in the longitudinal direction between the first longitudinal edge of the first shield electrode and the first longitudinal edge of the second shield electrode.

17. The broadband multilayer ceramic capacitor of claim 16 , wherein the capacitor has a capacitor length in the longitudinal direction between the first end and the second end of the capacitor, and wherein a ratio of the capacitor length to the first shield gap distance is greater than about 2.

18. The broadband multilayer ceramic capacitor of claim 15 , wherein a second shield gap distance is formed in the longitudinal direction between the second longitudinal edge of the first shield electrode and the second longitudinal edge of the second shield electrode.

19. A broadband multilayer ceramic capacitor having a first end and a second end that is spaced apart from the first end in a longitudinal direction that is perpendicular to a lateral direction, the lateral direction and longitudinal direction each being perpendicular to a Z-direction, the broadband multilayer ceramic capacitor comprising:
a monolithic body comprising a plurality of dielectric layers;
a first external terminal disposed along the first end;
a second external terminal disposed along the second end;
a plurality of active electrodes arranged within the monolithic body and parallel with the longitudinal direction; and
at least one shield electrode arranged within the monolithic body and parallel with the longitudinal direction, the at least one shield electrode comprising a first shield electrode that

Assignees

• Avx Corp
• Kyocera Avx Components Corp

Inventors

• Berolini Marianne
• Horn Jeffrey A
• Vanalstine Richard C

Classifications

• H01G4/30

  Stacked capacitors (H01G4/33 takes precedence) · CPC title

• H01G4/232 Primary

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

• H01G4/012

  Form of non-self-supporting electrodes · CPC title

• H01G4/35

  Feed-through capacitors or anti-noise capacitors · CPC title

• G01R31/64

  Testing of capacitors · CPC title