Multilayer electronic component

1 . A multilayer electronic component, comprising:

a body including a dielectric layer and internal electrodes alternately disposed with the dielectric layer in a first direction, and including first and second surfaces opposing each other in the first direction, third and fourth surfaces connected to the first and second surfaces and opposing each other in a second direction, and fifth and sixth surfaces connected to the first to fourth surfaces and opposing each other in a third direction;

first and second external electrodes disposed on the third and fourth surfaces, respectively; and

first and second side margin portions disposed on the fifth and sixth surfaces, respectively,

wherein the first and second side margin portions include a first extension portion disposed to extend onto portions of the first and second surfaces, and

when a third directional size of a central portion of the first extension portion in the second direction is referred to as WM 1 , and a third directional size of an end of the first extension portion in the second direction is referred to as WC 1 , WM 1 <WC 1 is satisfied.

2 . The multilayer electronic component according to claim 1 , wherein the first extension portion includes a substantially concave-shaped region.

3 . The multilayer electronic component according to claim 1 , wherein the first and second side margin portions include a region in which a third directional size of the first extension portion increases from the central portion of the first extension portion in the second direction to the end of the first extension portion in the second direction.

4 . The multilayer electronic component according to claim 1 , wherein when an average size of the body in the third direction is referred to as Wb, an average size in the third direction of each of the first and second side margin portions disposed on the fifth and sixth surfaces is referred to as WM 0 , and when CR 1 =2*(WC 1 −WM 0 )/Wb is provided, 0<CR 1 <10% is satisfied.

5 . The multilayer electronic component according to claim 1 , wherein the first and second side margin portions further include a second extension portion disposed to extend onto portions of the third and fourth surfaces,

when a third directional size of a central portion of the second extension portion in the first direction is referred to as WM 2 , and a third directional size of an end of the second extension portion in the first direction is referred to as WC 2 , WM 2 <WC 2 is satisfied.

6 . The multilayer electronic component according to claim 5 , wherein the second extension portion includes a concave-shaped region.

7 . The multilayer electronic component according to claim 5 , wherein the first and second side margin portions include a region in which a third directional size of the second extension portion increases from the central portion of the second extension portion in the first direction to the end of the second extension portion in the first direction.

8 . The multilayer electronic component according to claim 5 , wherein when an average size of the body in the third direction is referred to as Wb, an average size in the third direction of each of the first and second side margin portions disposed on the fifth and sixth surfaces is referred to as WM 0 , and the WC 2 is referred to as the third directional size of the second extension portion disposed on extension surfaces of the first and second surfaces, and when CR 2 =2*(WC 2 −WM 0 )/Wb is provided, 0<CR 2 <10% is satisfied.

9 . The multilayer electronic component according to claim 5 , wherein the internal electrodes include a first internal electrode exposed to the third surface and a second internal electrode exposed to the fourth surface, and

the second extension portion is disposed to be in contact with a portion of the first and second internal electrodes on the third and fourth surfaces.

10 . A multilayer electronic component, comprising:

a body including a dielectric layer and internal electrodes alternately disposed with the dielectric layer in a first direction, and including first and second surfaces opposing each other in the first direction, third and fourth surfaces connected to the first and second surfaces and opposing each other in a second direction, and fifth and sixth surfaces connected to the first to fourth surfaces and opposing each other in a third direction;

first and second external electrodes disposed on the third and fourth surfaces, respectively; and

first and second side margin portions disposed on the fifth and sixth surfaces, respectively,

wherein the first and second side margin portions include a second extension portion extending to a portion of the third and fourth surfaces, and

when a third directional size of a central portion of the second extension portion in the first direction is referred to as WM 2 , and a third directional size of an end of the second extension portion in the first direction is referred to as WC 2 , WM 2 <WC 2 is satisfied.

11 . The multilayer electronic component according to claim 10 , wherein the second extension portion includes a concave-shaped region.

12 . The multilayer electronic component according to claim 10 , wherein the first and second side margin portions include a region in which a third directional size of the second extension portion increases from the central portion of the second extension portion in the first direction to the end of the second extension portion in the first direction.

13 . The multilayer electronic component according to claim 10 , wherein when an average size of the body in the third direction is referred to as Wb, an average size in the third direction of each of the first and second side margin portions disposed on the fifth and sixth surfaces is referred to as WM 0 , and when CR 2 =2*(WC 2 −WM 0 )/Wb is provided, 0<CR 2 <10% is satisfied.

14 . The multilayer electronic component according to claim 10 , wherein the internal electrodes include a first internal electrode exposed to the third surface and a second internal electrode exposed to the fourth surface, and

the second extension portion is disposed to be in contact with a portion of the first and second internal electrodes on the third and fourth surfaces.

15 . The multilayer electronic component according to claim 10 , wherein the first and second side margin portions further include a first extension portion disposed to extend onto portions of the first and second surfaces, and

when a third directional size of a central portion of the first extension portion in the second direction is referred to as WM 1 , and a third directional size of the first extension portion disposed on extension surfaces of the third and fourth surfaces disposed in an end of the first extension portion in the second direction is referred to as WC 1 , WM 1 <WC 1 is satisfied.

16 . The multilayer electronic component according to claim 15 , wherein the first and second side margin portions include a region in which a third directional size of the first extension portion increases from the central portion of the first extension portion in the second direction to the end of the first extension portion in the second direction.

17 . The multilayer electronic component according to claim 15 , wherein when an average size of the body in the third direction is referred to as Wb and an average size in the third direction of each of the first and second side margin portions disposed on the fifth and sixth surfaces is referred to as WM 0 , and when CR 1 =2*(WC 1 −WM 0 )/Wb is provided, 0<CR 1 <10% is satisfied.

18 . A multilayer electronic component, comprising:

a capacitance forming portion comprising internal electrodes and dielectric layers stacked alternately in a thickness direction, wherein the internal electrodes are exposed through width-wise opposing surfaces of the capacitance forming portion and alternate internal electrodes are exposed from length-wise opposing surfaces of the capacitance forming portion;

cover portions disposed on thickness-wise opposing surfaces of the capacitance forming portion; and

side margin portions disposed on the width-wise opposing surfaces of the capacitance forming portion and cover portions, and comprising a first extension portion extending on to thickness-wise opposing surfaces of the cover portions,

wherein the first extension portion is relatively narrower at a length-wise central portion thereof compared to a length-wise end portion thereof.

19 . The multilayer electronic component of claim 18 , wherein the side margin portions further comprise a second extension portion extending to length-wise opposing surfaces of the body, and

wherein the second extension portion is relatively narrower at a width-wise central portion thereof compared to a width-wise end portion thereof.

20 . The multilayer electronic component of claim 18 , further comprising external electrodes disposed on the length-wise opposing surfaces of the capacitance forming portion.