Electronic component

• US 8,847,704 B2
• Filed: 03/14/2013
• Issued: 09/30/2014
• Est. Priority Date: 03/25/2011
• Status: Active Grant

• Current Assignee: Murata Manufacturing Co Limited
• Original Assignee: Murata Manufacturing Co Limited
• Inventors: Masuda, Hiroshi
• Primary Examiner(s): Lee, Benny
• Assistant Examiner(s): STEVENS, GERALD D
• Application Number:
  US13/802,881
• Publication Number:
  US 20130194056A1
• Time in Patent Office: 565 Days
• Field of Search: 333/204, 333/205, 333/185, 333/175, 333/176, 333/168
• US Class Current: 333/175
• CPC Class Codes: H03H 2001/0085 Multilayer, e.g. LTCC, HTCC, green sheets inside PCB filters H05K
• CPC Class Codes: H03H 7/0115 comprising only inductors and capacitors H03H7/075, H03H7/09, H03H7/12, H03H7/13 take precedence
• CPC Class Codes: H03H 7/0161 Bandpass filters H03H7/12 takes precedence
• CPC Class Codes: H03H 7/09 Filters comprising mutual inductance
• CPC Class Codes: H03H 7/1775 Parallel LC in shunt or branch path H03H7/1791 takes precedence

Abstract

In an electronic component, a laminated body includes a plurality of insulator layers laminated on each other. First, second and third LC parallel resonators are loop-shaped LC parallel resonators that include via hole conductors extending in a z-axis direction and conductor layers provided on the insulator layers, and define a band pass filter. Loop planes of the first and third LC parallel resonators and a loop plane of the second LC parallel resonator are parallel to the z-axis direction and not parallel to each other.

Claims

1. An electronic component comprising:

a laminated body including a plurality of insulator layers laminated on each other in a lamination direction; and

a first LC parallel resonator and a second LC parallel resonator that are loop-shaped LC parallel resonators each including via hole conductors extending in the lamination direction and a conductor layers provided on one of the plurality of insulator layers so as to define a band pass filter;

wherein

a first loop plane of the first LC parallel resonator and a second loop plane of the second LC parallel resonator are parallel to the lamination direction and not parallel to each other;

each of the first and second LC parallel resonators includes two of the via hole conductors that are disposed at opposite ends of the conductor layer of a respective one of the first and second LC parallel resonators;

the first loop plane intersects both of the two via hole conductors disposed at the opposite ends of the conductor layer of the first LC parallel resonator and all portions of the conductor layer of the first LC parallel resonator;

the second loop plane intersects both of the two via hole conductors disposed at the opposite ends of the conductor layer of the second LC parallel resonator and all portions of the conductor layer of the second LC parallel resonator.

2. The electronic component according to claim 1, wherein

the laminated body has a rectangular or substantially rectangular parallelepiped shape;

and

the second loop plane is parallel to a side of the laminated body in a planar view in the lamination direction.

3. The electronic component according to claim 1, wherein the first loop plane and the second loop plane define a right angle with each other.

4. The electronic component according to claim 1, further comprising:

a third LC parallel resonator that is a loop-shaped LC parallel resonator including via hole conductors extending in the lamination direction and a conductor layer provided on at least one of the insulator layers so as to define the band pass filter in association with the first LC parallel resonator and the second LC parallel resonator;

wherein

a third loop plane of the third LC parallel resonator is parallel to the lamination direction; and

the first loop plane and the third loop plane sandwich therebetween the second loop plane.

5. The electronic component according to claim 4, wherein the second loop plane and the third loop plane are not parallel to each other.

6. The electronic component according to claim 5, wherein in a planar view in the lamination direction, one end of the first loop plane and one end of the third loop plane are nearest to the second loop plane in a middle point of the second loop plane.

7. The electronic component according to claim 4, wherein the third LC parallel resonator includes a coil and a capacitor.

8. The electronic component according to claim 7, wherein the capacitor includes a capacitor conductor layer and a ground conductor layer.

9. The electronic component according to claim 8, wherein each of the capacitor conductor layer and the ground conductor layer has a rectangular or substantially rectangular shape.

10. The electronic component according to claim 7, wherein the coil includes the via hole conductors and a coil conductor layer.

11. The electronic component according to claim 7, wherein the coil has a U-shaped or substantially U-shaped configuration.

12. The electronic component according to claim 1, wherein

the first LC parallel resonator includes a coil and a capacitor;

the capacitor includes;

a ground conductor layer defined by the conductor layer provided on a lowest side of the first LC parallel resonator in the lamination direction; and

a capacitor conductor layer defined by the conductor layer facing the ground conductor layer through one of the insulator layers; and

the coil includes;

a first coil via hole conductor connected to the capacitor conductor layer and defined by one of the via hole conductors extending in the lamination direction;

a second coil via hole conductor connected to the ground conductor layer and defined by another one of the via hole conductors extending in the lamination direction; and

a coil conductor layer defined by the conductor layer connected to an end portion of the first coil via hole conductor, located on an upper side in the lamination direction, and an end portion of the second coil via hole conductor, located on an upper side in the lamination direction.

13. The electronic component according to claim 1, further comprising a plurality of external electrodes provided on the laminated body and defining input electrodes, output electrodes and ground electrodes.

14. The electronic component according to claim 1, wherein the plurality of insulating layers are rectangular or substantially rectangular.

15. The electronic component according to claim 1, wherein each of the first and second LC parallel resonators includes a coil and a capacitor.

16. The electronic component according to claim 15, wherein the capacitor of each of the first and second LC parallel resonators includes a capacitor conductor layer and a ground conductor layer.

17. The electronic component according to claim 16, wherein each of the capacitor conductor layer and the ground conductor layer has a rectangular or substantially rectangular shape.

18. The electronic component according to claim 15, wherein the coil of each of the first and second LC parallel resonators includes the via hole conductors and a coil conductor layer.

19. The electronic component according to claim 15, wherein the coil of each of the first and second LC parallel resonators has a U-shaped or substantially U-shaped configuration.

20. The electronic component according to claim 15, wherein each of the first loop plane and the second loop plane has a rectangular or substantially rectangular shape.

21. The electronic component according to claim 1, wherein

the laminated body includes first and second short sides that are opposed to each other and first and second long sides that are opposed to each other and longer than the first and second short sides;

and

a distance between one of the two via hole conductors of the first LC parallel resonator and one of the first and second short sides is different from a distance between the other of the two via hole conductors of the first LC parallel resonator and the one of the first and second short sides.

22. The electronic component according to claim 1, wherein

the laminated body includes first and second short sides that are opposed to each other and first and second long sides that are opposed to each other and longer than the first and second short sides;

and

the conductor layer of the second LC parallel resonator has a line shape extending parallel or substantially parallel to at least one of the first and second short sides.