US 7,595,973 B1
Multilayer chip capacitor and circuit board apparatus having the capacitor
Byoung Hwa Lee, Gyunggi-do (Korea, Republic of); Sung Kwon Wi, Seoul (Korea, Republic of); Hae Suk Chung, Seoul (Korea, Republic of); Dong Seok Park, Seoul (Korea, Republic of); Sang Soo Park, Gyunggi-do (Korea, Republic of); and Min Cheol Park, Gyunggi-do (Korea, Republic of)
Assigned to Samsung Electro-Mechanics Co., Ltd., Gyunggi-Do (Korea, Republic of)
Filed on Oct. 31, 2008, as Appl. No. 12/262,909.
Claims priority of application No. 2008-0079442 (KR), filed on Aug. 13, 2008.
Int. Cl. H01G 4/228 (2006.01)
U.S. Cl. 361—306.3  [361/306.1; 361/321.1; 361/321.2; 361/308.1; 361/303] 39 Claims
OG exemplary drawing
 
1. A multilayer chip capacitor comprising:
a capacitor body having a plurality of dielectric layers laminated therein, the capacitor body comprising first and second capacitor units disposed in a laminated direction;
first to fourth outer electrodes formed on side surfaces of the capacitor body, respectively,
wherein the first and third outer electrodes have identical polarity to each other and the second and fourth outer electrodes have identical polarity to each other but different polarities from the first outer electrode; and
at least one connecting conductor line connecting the first outer electrode and the third outer electrode to each other and the second outer electrode and the fourth outer electrode to each other,
wherein the first capacitor body comprises first and second inner electrodes of different polarities disposed to oppose each other while interposing a corresponding one of the dielectric layers,
the second capacitor unit comprises a plurality of third and fourth inner electrodes arranged alternately to oppose each other, while interposing corresponding ones of the dielectric layers, respectively
the first to fourth outer electrodes are connected to the first to fourth inner electrodes, respectively, and
an equivalent series resistance of the first capacitor unit and a combined equivalent series resistance of the second capacitor and the connecting conductor line satisfy the following Equation:
0.7(R1)≤R2′≤1.3(R1)  Equation,
where R2′ is the combined equivalent series resistance of the second capacitor and the connecting conductor and R1 is the equivalent series resistance of the first capacitor unit.