Multilayer coil component
A multilayer coil component includes an element body including a main surface, first and second external electrodes disposed on the main surface, a coil disposed in the element body, a first connection conductor connecting the first external electrode and the coil, and a second connection conductor connecting the second external electrode and the coil. The second connection conductor includes a pad conductor and a through-hole conductor. The pad conductor and through-hole conductor are separated from the coil. The through-hole conductor includes a connection end connected to the pad conductor. The pad conductor includes a first portion overlapping the entire connection end included in the through-hole conductor and a second portion continuous with the first portion. The second portion is separated from the coil more than the first portion.
1 . A multilayer coil component comprising:
an element body including a main surface arranged to constitute a mounting surface;
a first external electrode and a second external electrode disposed on the main surface and separated from each other;
a coil disposed in the element body to have a coil axis along a direction intersecting the main surface, the coil including a first end and a second end separated from the main surface more than the first end;
a first connection conductor connecting the first external electrode and the first end; and
a second connection conductor connecting the second external electrode and the second end, wherein
the second connection conductor includes a plurality of pad conductors and a plurality of through-hole conductors that are alternately disposed in a direction crossing the main surface and separated from the coil,
each of the plurality of through-hole conductors includes a connection end connected to an adjacent pad conductor among the plurality of pad conductors,
each of the plurality of pad conductors includes:
a first portion overlapping an entire connection end included in an adjacent through-hole conductor among the plurality of through-hole conductors;
a second portion that is continuous with the first portion and is separated from the coil more than the first portion; and
a constriction located at a transition between the first portion and the second portion.
2 . The multilayer coil component according to claim 1 , wherein
for each of the plurality of pad conductors, the second portion is formed to extend from the first portion in a direction in which a distance between the second portion and the coil does not decrease.
3 . The multilayer coil component according to claim 1 , wherein
for each of the plurality of pad conductors, a distance between the coil and the second portion at a position away from the first portion is larger than a distance between the coil and the second portion at a position close to the first portion.
4 . The multilayer coil component according to claim 3 , wherein
for each of the plurality of pad conductors, the distance between the coil and the second portion increases with increasing a distance from the first portion.
5 . The multilayer coil component according to claim 1 , wherein
for each of the plurality of pad conductors, a width of the second portion in a direction defining a shortest distance between the coil and the second portion at a position away from the first portion is smaller than a width of the second portion in the direction defining the shortest distance at a position close to the first portion.
6 . The multilayer coil component according to claim 1 , wherein for each of the plurality of pad conductors:
a third portion is included that is separated from the second portion,
the third portion is continuous with the first portion and is separated from the coil more than the first portion, and
a constriction is located at a transition between the first portion and the third portion.
7 . The multilayer coil component according to claim 6 , wherein
for each of the plurality of pad conductors, the third portion is formed to extend from the first portion in a direction in which a distance between the third portion and the coil does not decrease.
8 . The multilayer coil component according to claim 6 , wherein
for each of the plurality of pad conductors a distance between the coil and the third portion at a position away from the first portion is larger than a distance between the coil and the third portion at a position close to the first portion.
9 . The multilayer coil component according to claim 8 , wherein
for each of the plurality of pad conductors, the distance between the coil and the third portion increases with increasing a distance from the first portion.
10 . The multilayer coil component according to claim 6 , wherein
for each of the plurality of pad conductors, a width of the third portion in a direction defining a shortest distance between the coil and the third portion at a position away from the first portion is smaller than a width of the third portion in the direction defining the shortest distance at a position close to the first portion.
11 . A multilayer coil component comprising:
an element body including a main surface;
a first external electrode and a second external electrode disposed on the main surface;
a coil disposed in the element body and including a plurality of turns;
a first connection conductor connecting the first external electrode and the coil; and
a second connection conductor connecting the second external electrode and the coil and opposing the plurality of turns, wherein
the second connection conductor includes a pad conductor and a through-hole conductor that are adjacent to each other,
the through-hole conductor includes a connection end connected to the pad conductor, and
the pad conductor includes:
a first portion overlapping the entire connection end and having a first shortest distance from the coil;
a second portion continuous with the first portion and having a second shortest distance from the coil that is larger than the first shortest distance; and
a constriction located at a transition between the first portion and the second portion.
12 . The multilayer coil component according to claim 11 , wherein
in the second portion, the second shortest distance at least does not decrease with increasing a distance from the first portion.
13 . The multilayer coil component according to claim 11 , wherein
in the second portion, the second shortest distance at a position away from the first portion is larger than the second shortest distance at a position close to the first portion.
14 . The multilayer coil component according to claim 13 , wherein
the second shortest distance increases with increasing a distance from the first portion.
15 . The multilayer coil component according to claim 11 , wherein
the second portion has a first width at a position close to the first portion and a second width smaller than the first width at a position away from the first portion.
16 . The multilayer coil component according to claim 11 , wherein
the pad conductor includes:
a third portion continuous with the first portion, separated from the second portion, and having a third shortest distance from the coil that is larger than the first shortest distance, and
a constriction located at a transition be the first portion and the third portion.
17 . The multilayer coil component of claim 16 , wherein
in the third portion, the third shortest distance at least does not decrease with increasing a distance from the first portion.
18 . The multilayer coil component of claim 16 , wherein
in the third portion, the third shortest distance at a position away from the first portion is larger than the third shortest distance at a position close to the first portion.
19 . The multilayer coil component of claim 18 , wherein
the third shortest distance increases with increasing a distance from the first portion.
20 . The multilayer coil component of claim 16 , wherein
the third portion has a third width at a position close to the first portion and has a fourth width smaller than the third width at a position away from the first portion.