Multilayer capacitor

• US 7,428,135 B2
• Filed: 06/26/2006
• Issued: 09/23/2008
• Est. Priority Date: 06/26/2006
• Status: Active Grant

• Current Assignee: TDK Corporation
• Original Assignee: TDK Corporation
• Inventors: Aoki, Takashi, Togashi, Masaaki, Yoshida, Takeru, Burket, Chris T
• Primary Examiner(s): Dinh; Phuong K
• Application Number:
  US11/474,306
• Publication Number:
  US 20070297153A1
• Time in Patent Office: 820 Days
• Field of Search: 361/303, 361/305, 361/304, 361/306.1, 361/306.3, 361310-315
• US Class Current: 361/303
• CPC Class Codes: H01G 4/012 Form of non-self-supporting electrodes
• CPC Class Codes: H01G 4/232 electrically connecting two or more layers of a stacked or rolled capacitor
• CPC Class Codes: H01G 4/30 Stacked capacitors H01G4/33 takes precedence

Abstract

A multilayer capacitor comprises a multilayer body in which dielectric layers and first and second inner electrodes are alternately laminated, and first and second terminal conductors and first and second outer connecting conductors. At least one each of first and second terminal conductors and the first outer connecting conductor are formed on a first side face of the multilayer body. At least one each of the first and second terminal conductors and the second outer connecting conductor are formed on a second side face of the multilayer body opposing the first side face. Each inner electrode is electrically connected to the corresponding outer connecting conductors. First and second inner connecting conductors electrically connected to the corresponding terminal and outer connecting conductors are laminated in the multilayer body. An equivalent series resistance is set to a desirable value by adjusting the number or positions of the inner connecting conductors.

Claims

1. A multilayer capacitor comprising a multilayer body in which a plurality of dielectric layers and a plurality of inner electrodes are alternately laminated, and a plurality of outer conductors formed on side faces of the multilayer body;

wherein the plurality of inner electrodes include a plurality of first inner electrodes and a plurality of second inner electrodes alternately arranged;

wherein the plurality of outer conductors include a plurality of first terminal conductors, a plurality of second terminal conductors, a first outer connecting conductor, and a second outer connecting conductor;

wherein with respect to two selected first terminal conductors from among the plurality of first terminal conductors, one is formed on a first side face of the multilayer body, whereas the other is formed on a second side face of the multilayer body opposing the first side face;

wherein with respect to two selected second terminal conductors from among the plurality of second terminal conductors, one is formed on the first side face of the multilayer body, whereas the other is formed on the second side face of the multilayer body;

wherein the first outer connecting conductor is formed on the first side face of the multilayer body;

wherein the second outer connecting conductor is formed on the second side face of the multilayer body;

wherein each of the first inner electrodes is electrically connected to the first outer connecting conductor through a lead conductor;

wherein each of the second inner electrodes is electrically connected to the second outer connecting conductor through a lead conductor;

wherein at least one first inner connecting conductor and at least one second inner connecting conductor are laminated in the multilayer body;

wherein the first inner connecting conductor is electrically connected to the plurality of first terminal conductors and the first outer connecting conductor, whereas the second inner connecting conductor is electrically insulated from the first inner connecting conductor but is electrically connected to the plurality of second terminal conductors and the second outer connecting conductor;

wherein the first and second inner connecting conductors are laminated in the multilayer body such that the multilayer body includes at least one set of the first and second inner electrodes neighboring each other with the dielectric layer in between in a laminating direction; and

wherein an equivalent series resistance is set to a desirable value by adjusting the number of first inner connecting conductors and the number of second inner connecting conductors respectively.

2. A multilayer capacitor according to claim 1, wherein the first outer connecting conductor is formed so as to be positioned between the first and second terminal conductors on the first side face;

and

wherein the second outer connecting conductor is formed so as to be positioned between the first and second terminal conductors on the second side face.

3. A multilayer capacitor according to claim 1, wherein the first terminal conductor formed on the first side face and the second terminal conductor formed on the second side face oppose each other along a direction in which the first and second side faces oppose each other;

and

wherein the first terminal conductor formed on the second side face and the second terminal conductor formed on the first side face oppose each other along the direction in which the first and second side faces oppose each other.

4. A multilayer capacitor comprising a multilayer body in which a plurality of dielectric layers and a plurality of inner electrodes are alternately laminated, and a plurality of outer conductors formed on side faces of the multilayer body;

wherein the plurality of inner electrodes include a plurality of first inner electrodes and a plurality of second inner electrodes alternately arranged;

wherein the plurality of outer conductors include a plurality of first terminal conductors, a plurality of second terminal conductors, a first outer connecting conductor, and a second outer connecting conductor;

wherein with respect to two selected first terminal conductors from among the plurality of first terminal conductors, one is formed on a first side face of the multilayer body, whereas the other is formed on a second side face of the multilayer body opposing the first side face;

wherein with respect to two selected second terminal conductors from among the plurality of second terminal conductors, one is formed on the first side face of the multilayer body, whereas the other is formed on the second side face of the multilayer body;

wherein the first outer connecting conductor is formed on the first side face of the multilayer body;

wherein the second outer connecting conductor is formed on the second side face of the multilayer body;

wherein each of the first inner electrodes is electrically connected to the first outer connecting conductor through a lead conductor;

wherein each of the second inner electrodes is electrically connected to the second outer connecting conductor through a lead conductor;

wherein at least one first inner connecting conductor and at least one second inner connecting conductor are laminated in the multilayer body;

wherein the first inner connecting conductor is electrically connected to the plurality of first terminal conductors and the first outer connecting conductor, whereas the second inner connecting conductor is electrically insulated from the first inner connecting conductor but is electrically connected to the plurality of second terminal conductors and the second outer connecting conductor;

wherein the first and second inner connecting conductors are laminated in the multilayer body such that the multilayer body includes at least one set of the first and second inner electrodes neighboring each other with the dielectric layer in between in a laminating direction; and

wherein an equivalent series resistance is set to a desirable value by adjusting a position of the first inner connecting conductor in the multilayer body in the laminating direction and a position of the second inner connecting conductor in the multilayer body in the laminating direction.

5. A multilayer capacitor according to claim 4, wherein the first outer connecting conductor is formed so as to be positioned between the first and second terminal conductors on the first side face;

and

wherein the second outer connecting conductor is formed so as to be positioned between the first and second terminal conductors on the second side face.

6. A multilayer capacitor according to claim 4, wherein the first terminal conductor formed on the first side face and the second terminal conductor formed on the second side face oppose each other along a direction in which the first and second side faces oppose each other;

and

wherein the first terminal conductor formed on the second side face and the second terminal conductor formed on the first side face oppose each other along the direction in which the first and second side faces oppose each other.