Multilayer ceramic capacitor and board having the same

Abstract

A multilayer ceramic capacitor may include three external electrodes disposed on a mounting surface of a ceramic body to be spaced apart from one another. When a length of the ceramic body is defined as L, and a width of an active region including a plurality of internal electrodes disposed therein in a width direction of the ceramic body is defined as A, A/L is in a range of 0.64 to 1.14 (0.64≦A/L≦1.14).

What is claimed is: 
     
         1 . A multilayer ceramic capacitor comprising:
 a ceramic body including a plurality of dielectric layers stacked therein in a width direction thereof;   an active region including a plurality of first and second internal electrodes alternately disposed, having each of the dielectric layers interposed therebetween;   first and second lead portions extended from the first internal electrode so as to be exposed to a mounting surface of the ceramic body, and disposed to be spaced apart from each other in a length direction of the ceramic body;   a third lead portion extended from the second internal electrode so as to be exposed to the mounting surface of the ceramic body, and disposed between the first and second lead portions;   first and second external electrodes disposed on the mounting surface of the ceramic body to be spaced apart from each other in the length direction thereof, and connected to the first and second lead portions, respectively; and   a third external electrode disposed on the mounting surface of the ceramic body between the first and second external electrodes, and connected to the third lead portion,   wherein when a length of the ceramic body is defined as L and a width of the active region is defined as A, A/L is in a range of 0.64 to 1.14 (0.64≦A/L≦1.14).   
     
     
         2 . The multilayer ceramic capacitor of  claim 1 , wherein A/L is 0.94 or less. 
     
     
         3 . The multilayer ceramic capacitor of  claim 1 , wherein when the length of the ceramic body is defined as L, and a width of the ceramic body is defined as W, W/L is in a range of 0.7 to 1.2 (0.7≦W/L≦1.2). 
     
     
         4 . The multilayer ceramic capacitor of  claim 3 , wherein W/L is 1.0 or less. 
     
     
         5 . The multilayer ceramic capacitor of  claim 1 , wherein the length of the ceramic body is greater than 0.8 mm. 
     
     
         6 . The multilayer ceramic capacitor of  claim 1 , wherein the first and second internal electrodes are disposed to be spaced apart from both end surfaces of the ceramic body in the length direction thereof. 
     
     
         7 . The multilayer ceramic capacitor of  claim 1 , further comprising cover layers disposed on both side surfaces of the active region in the width direction. 
     
     
         8 . The multilayer ceramic capacitor of  claim 1 , wherein the first to third external electrodes are extended from the mounting surface of the ceramic body to portions of both side surfaces of the ceramic body in the width direction. 
     
     
         9 . The multilayer ceramic capacitor of  claim 1 , further comprising:
 fourth and fifth lead portions extended from the first internal electrode so as to be exposed to a surface of the ceramic body opposing the mounting surface of the ceramic body, and disposed to be spaced apart from each other in the length direction thereof;   a sixth lead portion extended from the second internal electrode to be exposed to the surface of the ceramic body opposing the mounting surface of the ceramic body, and disposed between the fourth and fifth lead portions; and   an insulating layer disposed on the surface of the ceramic body opposing the mounting surface of the ceramic body.   
     
     
         10 . The multilayer ceramic capacitor of  claim 1 , further comprising:
 fourth and fifth lead portions extended from the first internal electrode so as to be exposed to a surface of the ceramic body opposing the mounting surface of the ceramic body, and disposed to be spaced apart from each other in the length direction thereof;   a sixth lead portion extended from the second internal electrode so as to be exposed to the surface of the ceramic body opposing the mounting surface of the ceramic body, and disposed between the fourth and fifth lead portions;   fourth and fifth external electrodes disposed on the surface of the ceramic body opposing the mounting surface of the ceramic body to be spaced apart from each other in the length direction thereof, and connected to the fourth and fifth lead portions, respectively; and   a sixth external electrode disposed between the fourth and fifth external electrodes, extended from the surface of the ceramic body opposing the mounting surface of the ceramic body to portions of both side surfaces of the ceramic body in the width direction thereof, and connected to the sixth lead portion.   
     
     
         11 . The multilayer ceramic capacitor of  claim 10 , wherein the fourth to sixth external electrodes are extended from the surface of the ceramic body opposing the mounting surface of the ceramic body to portions of both side surfaces of the ceramic body in the width direction thereof. 
     
     
         12 . A board having a multilayer ceramic capacitor comprising:
 a circuit board on which first to third electrode pads are disposed; and   the multilayer ceramic capacitor of  claim 1  of which the first to third external electrodes are mounted on the first to third electrode pads, respectively.   
     
     
         13 . A board having a multilayer ceramic capacitor comprising:
 a circuit board on which first to third electrode pads are disposed; and   the multilayer ceramic capacitor of  claim 9  of which the first to third external electrodes are mounted on the first to third electrode pads, respectively.   
     
     
         14 . A board having a multilayer ceramic capacitor comprising:
 a circuit board on which first to third electrode pads are disposed; and   the multilayer ceramic capacitor of  claim 10  of which the first to third external electrodes are mounted on the first to third electrode pads, respectively.