Multilayer ceramic capacitor and method of fabricating the same
A multilayer ceramic capacitor includes: a capacitor body comprising a dielectric layer and an internal electrode layer; and an external electrode disposed on an outside surface of the capacitor body, wherein the capacitor body includes an active portion where the dielectric layer and the internal electrode layer are alternately disposed, side margin portions disposed at both side end portions of the active portion facing each other, and bonding portions disposed between the active portion and the side margin portions, and at least one of the active portion or the side margin portions includes a barium titanate-based main ingredient including barium (Ba) and titanium (Ti), and gallium (Ga).
1 . A multilayer ceramic capacitor, comprising:
a capacitor body including a dielectric layer and an internal electrode layer; and
an external electrode disposed on an outside surface the capacitor body,
wherein
the capacitor body includes: an active portion where the dielectric layer and the internal electrode layer are alternately disposed; side margin portions disposed at both side end portions of the active portion facing each other; and bonding portions disposed between the active portion and the side margin portions; and
the side margin portions includes a barium titanate-based main ingredient including barium (Ba) and titanium (Ti), and gallium (Ga),
each of the side margin portions are divided into a first side margin portion and a second side margin portion in a width direction,
the first side margin portion is a region closer to the bonding portions;
the second side margin portion is a remaining region,
the first side margin portion includes gallium (Ga),
wherein gallium (Ga) is included in the first side margin portion and the second side margin portion, and gallium (Ga) is included in a higher content in the first side margin portion than in the second side margin portion.
2 . The multilayer ceramic capacitor of claim 1 , wherein the first side margin portion includes gallium (Ga) in an amount ranging from more than 0 parts by weight to 1.5 parts by weight or less based on 100 parts by weight of barium (Ba) included in the first side margin portion.
3 . The multilayer ceramic capacitor of claim 1 , wherein the active portion includes the barium titanate-based main ingredient and gallium (Ga).
4 . The multilayer ceramic capacitor of claim 3 , wherein the active portion includes boundary vicinity regions defined as a region from a boundary between the active portion and each of the bonding portions to a point having a length corresponding to two to three times a width direction length of each of the side margin portions, and gallium (Ga) is included in the boundary vicinity region of the active portion.
5 . The multilayer ceramic capacitor of claim 4 , wherein the boundary vicinity regions of the active portion are divided into a first active portion and a second active portion in a width direction,
the first active portion is a region closer to one of the bonding portions, and
the second active portion is a remaining region a,
gallium (Ga) is included in the first active portion and the second active portion, and
gallium (Ga) is included in a higher content in the first active portion than in the second active portion.
6 . The multilayer ceramic capacitor of claim 1 , wherein each of the side margin portion and the active portion includes the barium titanate-based main ingredient and gallium (Ga).
7 . The multilayer ceramic capacitor of claim 6 , wherein gallium (Ga) is included in a higher content in the side margin portion than in the active portion.
8 . The multilayer ceramic capacitor of claim 1 , wherein the bonding portion includes a barium titanate-based compound including barium (Ba) and titanium (Ti), and gallium (Ga).
9 . The multilayer ceramic capacitor of claim 8 , wherein the bonding portion includes gallium (Ga) in an amount of 0.3 parts by weight to 1.5 parts by weight based on 100 parts by weight of the barium (Ba).
10 . The multilayer ceramic capacitor of claim 1 , wherein a pore generation rate at an end portion of the internal electrode layer obtained by Equation 1 below with respect to a bonding surface between the active portion and the bonding portion is more than 0% to 40% or less:
The pore generation rate at the end portion of the internal electrode layer (%)=(The number of internal electrode layers having pores at the end portion thereof/Total number of the internal electrode layers)×100. [Equation 1]
11 . The multilayer ceramic capacitor of claim 1 , wherein at least one of the bonding portions includes gallium (Ga) in an amount of 0.5 parts by weight to 1.2 parts by weight based on 100 parts by weight of barium (Ba) in the bonding portions.
12 . A multilayer ceramic capacitor, comprising:
a capacitor body including a dielectric layer and an internal electrode layer; and
an external electrode disposed on an outside surface the capacitor body,
wherein
the capacitor body includes: an active portion where the dielectric layer and the internal electrode layer are alternately disposed; side margin portions disposed at both side end portions of the active portion facing each other; and bonding portions disposed between the active portion and the side margin portions; and
at least one of the bonding portions includes gallium (Ga) in an amount of 0.3 parts by weight to 1.5 parts based on 100 parts by weight of barium (Ba) in the bonding portions,
each of the side margin portions are divided into a first side margin portion and a second side margin portion in a width direction,
the first side margin portion is a region closer to the bonding portions;
the second side margin portion is a remaining region,
the first side margin portion includes gallium (Ga),
wherein gallium (Ga) is included in the first side margin portion and the second side margin portion, and gallium (Ga) is included in a higher content in the first side margin portion than in the second side margin portion.