Electronic component

• US 9,479,136 B2
• Filed: 08/15/2014
• Issued: 10/25/2016
• Est. Priority Date: 10/30/2013
• Status: Active Grant

• Current Assignee: Murata Manufacturing Co Limited
• Original Assignee: Murata Manufacturing Co Limited
• Inventors: Masuda, Hiroshi
• Primary Examiner(s): Pascal, Robert
• Assistant Examiner(s): PATEL, RAKESH BHASKARBHAI
• Application Number:
  US14/460,439
• Publication Number:
  US 20150116056A1
• Time in Patent Office: 802 Days
• Field of Search: 333/175, 333/185
• US Class Current: 1/1
• 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 7/1708 Comprising bridging elements, i.e. elements in a series path without own reference to ground and spanning branching nodes of another series path H03H7/07 takes precedence
• CPC Class Codes: H03H 7/1725 Element to ground being common to different shunt paths, i.e. Y-structure
• CPC Class Codes: H03H 7/1766 Parallel LC in series path H03H7/1783 takes precedence

Abstract

In an electronic component, first through n-th LC parallel resonators respectively include first through n-th inductors disposed in a device body such that they are sequentially arranged in a first direction in an order from the first inductor to the n-th inductor. The first and the n-th inductors are wound around respective winding axes extending along the first direction. At least one predetermined inductor among the second through the (n−1)-th inductors is wound around a winding axis extending in a second direction which is perpendicular or substantially perpendicular to the first direction. A center of the predetermined inductor in the second direction is positioned toward one side of the second direction with respect to the winding axes of the first and the n-th inductors, as viewed from a plane of the device body in a third direction which is perpendicular or substantially perpendicular to the first and second directions.

Claims

1. An electronic component comprising:

a device body; and

first through n-th LC parallel resonators connected in series with each other, where n is an integer equal to three or more;

wherein

the first through the n-th LC parallel resonators respectively include first through n-th inductors and first through n-th capacitors;

the first through the n-th inductors are disposed in the device body so as to be sequentially arranged in a first direction in an order from the first inductor to the n-th inductor;

the first and the n-th inductors are wound around respective winding axes extending along the first direction;

at least one predetermined inductor among the second through the (n−

1)-th inductors is wound around a winding axis extending in a second direction which is perpendicular or substantially perpendicular to the first direction;

a center of the at least one predetermined inductor in the second direction is positioned toward one side of the second direction with respect to the winding axes of the first and the n-th inductors, as viewed from a plane of the device body in a third direction which is perpendicular or substantially perpendicular to the first and second directions; and

as viewed from the plane of the device body in the third direction, the at least one predetermined inductor protrudes from the first and the n-th inductors toward one side of the second direction and does not protrude from the first and the n-th inductors toward the other side of the second direction.

2. The electronic component according to claim 1, wherein the electronic component is a low pass filter.

3. The electronic component according to claim 1, wherein the at least one predetermined inductor is superposed on neither of the first inductor nor the n-th inductor, as viewed from a plane of the device body in the first direction.

4. The electronic component according to claim 1, wherein n is equal to three.

5. The electronic component according to claim 4, wherein a resonant frequency of the second LC parallel resonator is lower than a resonant frequency of the first LC parallel resonator and a resonant frequency of the third LC parallel resonator.

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

an input terminal that is disposed on a top surface of the device body and that is connected to the first LC parallel resonator;

an output terminal that is disposed on the top surface of the device body and that is connected to the third LC parallel resonator;

a ground terminal disposed on a bottom surface of the device body; and

an (n+1)-th capacitor disposed between a node between the input terminal and the first LC parallel resonator and the ground terminal, between a node between the first and second LC parallel resonators and the ground terminal, between a node between the second and third LC parallel resonators and the ground terminal, or between a node between the third LC parallel resonator and the output terminal and the ground terminal.

7. The electronic component according to claim 6, further comprising an additional inductor disposed between the (n+1)-th capacitor and the ground terminal.

8. The electronic component according to claim 6, wherein:

the device body includes a plurality of insulating layers stacked on each other in the third direction; and

the capacitors and the inductors of the first, second and third LC parallel resonators include internal conductors disposed on the plurality of insulating layers and the inductors of the first, second and third LC parallel resonators further include interlayer connecting conductors which pass through the plurality of insulating layers in the third direction.

9. The electronic component according to claim 8, wherein

the (n+1)-th capacitor is disposed between the node between the first and the second LC parallel resonators and the ground terminal;

and

the electronic component further comprises;

a first interlayer connecting conductor that electrically connects the first inductor and the (n+1)-th capacitor; and

a second interlayer connecting conductor that electrically connects the second inductor and the (n+1)-th capacitor.

10. The electronic component according to claim 8, wherein at least one of the first, second, and third inductors includes a plurality of internal conductors connected in parallel with each other.

11. The electronic component according to claim 8, wherein:

the second inductor includes;

a plurality of first inductor conductors that are disposed on an insulating layer of the device body and that are arranged in parallel or substantially in parallel with each other in the second direction;

a plurality of second inductor conductors that are arranged to extend along the first direction, that are disposed on an insulating layer of the device body positioned farther toward one side of the third direction than the insulating layer on which the plurality of first inductor conductors are disposed, and that are configured such that, as viewed from a plane of the device body in the third direction, one end portion of each of the plurality of second inductor conductors is superposed on one end portion of the first inductor conductor which is positioned on one side of the second direction, and the other end portion of each of the plurality of second inductor conductors is superposed on the other end portion of the first inductor conductor which is positioned on the other side of the second direction;

a third interlayer connecting conductor that connects one end portion of the first inductor conductor which is positioned on one side of the second direction and one end portion of each of the plurality of second inductor conductors; and

a fourth interlayer connecting conductor that connects the other end portion of the first inductor conductor which is positioned on the other side of the second direction and the other end portion of each of the plurality of second inductor conductors; and

the plurality of first inductor conductors are distributed among a plurality of the insulating layers.

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

an input terminal that is disposed on a top surface of the device body and that is connected to the first LC parallel resonator;

an output terminal that is disposed on the top surface of the device body and that is connected to the third LC parallel resonator; and

an (n+2)-th capacitor disposed between the input terminal and the output terminal.

13. The electronic component according to claim 1, wherein the first inductor and the n-th inductor are spiral shaped or substantially spiral shaped, and the at least one predetermined inductor is helical shaped or substantially helical shaped.

14. The electronic component according to claim 1, wherein the first inductor, the n-th inductor, and the at least one predetermined inductor are helical shaped or substantially helical shaped.

15. The electronic component according to claim 1, wherein, when a current flows through the first through the n-th inductors, a direction in which the current flows through the first inductor is opposite to a direction in which the current flows through the n-th inductor.

16. The electronic component according to claim 1, further comprising an additional capacitor connected between external terminals of the electronic component.

17. The electronic component according to claim 16, wherein the capacitor between the external terminals of the electronic component includes a plurality of strip-shaped or substantially strip-shaped capacitor conductors.

18. The electronic component according to claim 16, wherein the capacitor between the external terminals of the electronic component includes a plurality of inductor conductors and a plurality of capacitor conductors.