Flexible circuit board and electronic device comprising same
An electronic device is provided. The electronic device includes a housing, a main circuit board arranged inside the housing, and at least one flexible circuit board electrically connected to the main circuit board, wherein the flexible circuit board includes a flexible circuit part, and a joining part arranged on one end of the flexible circuit part and connected to the main circuit board. A first joining part includes a first layer oriented a first direction and having at least one first connection hole, a second layer oriented in a second direction opposite to the first direction and has at least one second connection hole, and a reinforcement member which is arranged between the first and the second layer and is connected to the flexible circuit part while being arranged such that at least a portion thereof overlaps with the one end part of the flexible circuit part.
1 . An electronic device comprising:
a housing;
a main circuit board disposed within the housing; and
at least one flexible circuit board electrically connected to the main circuit board,
wherein the flexible circuit board comprises:
a flexible circuit part, and
a connection part disposed at one end of the flexible circuit part and connected to the main circuit board,
wherein the connection part comprises:
a first layer oriented in a first direction and including one or more first connection holes,
a second layer oriented in a second direction opposite to the first direction and including one or more second connection holes, and
a reinforcing member, disposed between the first and second layers, and connected to a layer of the flexible circuit part in a state of at least partially overlapping one end portion of the flexible circuit part, the layer of the flexible circuit part being disposed in a same layer as the reinforcing member, and
wherein a material of the layer of the flexible circuit part is different from a material of the reinforcing member.
2 . The electronic device of claim 1 , wherein the reinforcing member comprises:
first and second reinforcing insulating films, and
an adhesive layer bonded between the first and second reinforcing insulating films.
3 . The electronic device of claim 2 , wherein the adhesive layer comprises one end portion disposed to overlap the one end portion of the flexible circuit part.
4 . The electronic device of claim 2 , wherein the flexible circuit part comprises:
a first conductive layer disposed to be oriented in the first direction, and
a second conductive layer disposed to be oriented in the second direction and spaced apart from the first conductive layer.
5 . The electronic device of claim 4 ,
wherein the first conductive layer comprises:
a first protective layer applied to a first surface of the first conductive layer oriented in the first direction, and
a first insulating film disposed on a second surface of the first conductive layer oriented in the second direction, and
wherein the second conductive layer comprises:
a second protective layer applied to a first surface of the second conductive layer oriented in the first direction, and
a second insulating film disposed on a second surface of the second conductive layer oriented in the second direction.
6 . The electronic device of claim 5 , further comprising: an air layer between the first and second insulating films.
7 . The electronic device of claim 6 , wherein the adhesive layer directly faces the air layer.
8 . The electronic device of claim 5 , further comprising: a flexible material between the first and second insulating films.
9 . The electronic device of claim 5 ,
wherein the first reinforcing insulating film extends from the first insulating film, and
wherein the second reinforcing insulating film extends from the second insulating film.
10 . The electronic device of claim 1 ,
wherein the reinforcing member comprises one or more third connection holes, and
wherein each of the one or more third connection holes are disposed to be vertically coaxial to a corresponding one of the one or more first connection holes and a corresponding one of the one or more second connection holes.
11 . The electronic device of claim 1 , wherein an interposer is disposed between the connection part and the main circuit board.
12 . The electronic device of claim 11 ,
wherein the interposer comprises one or more fourth connection holes, and
wherein each of the one or more fourth connection holes are disposed to be vertically coaxial to a corresponding one of the one or more first connection holes and a corresponding one of the one or more second connection holes.
13 . The electronic device of claim 1 , wherein each of the one or more first connection holes are disposed to be vertically coaxial to a corresponding one of the one or more second connection holes.
14 . A flexible circuit board comprising:
a flexible circuit part; and
a connection part disposed at one end of the flexible circuit part,
wherein the connection part comprises:
a first layer oriented in a first direction and including one or more first connection holes,
a second layer oriented in a second direction opposite to the first direction and including one or more second connection holes, and
a reinforcing member, disposed between the first and second layers, connected to a layer of the flexible circuit part in a state of at least partially overlapping one end portion of the flexible circuit part, the layer of the flexible circuit part being disposed in a same layer as the reinforcing member, and
wherein a material of the layer of the flexible circuit part is different from a material of the reinforcing member.
15 . The flexible circuit board of claim 14 , wherein the reinforcing member comprises:
first and second reinforcing insulating films, and
an adhesive layer bonded between the first and second reinforcing insulating films.
16 . The flexible circuit board of claim 15 , wherein the adhesive layer comprises one end portion disposed to overlap the one end portion of the flexible circuit part.
17 . The flexible circuit board of claim 15 , wherein the flexible circuit part comprises:
a first conductive layer disposed to be oriented in the first direction, and
a second conductive layer disposed to be oriented in the second direction opposite and spaced apart from the first conductive layer.
18 . The flexible circuit board of claim 17 ,
wherein the first conductive layer comprises:
a first protective layer applied to a first surface of the first conductive layer oriented in the first direction, and
a first insulating film disposed on a second surface of the first conductive layer oriented in the second direction, and
wherein the second conductive layer comprises:
a second protective layer applied to a first surface of the second conductive layer oriented in the first direction, and
a second insulating film disposed on a second surface of the second conductive layer oriented in the second direction.
19 . The flexible circuit board of claim 18 , further comprising: an air layer between the first and second insulating films.
20 . The flexible circuit board of claim 19 , wherein the adhesive layer directly faces the air layer.