Electronic device including flexible printed circuit board

A flexible printed circuit board (FPCB) arranged in an electronic device, the FPCB comprising:

• a first base layer comprising a first base surface and a second base surface opposite to the first base surface;
• a first metal layer arranged on the second base surface and forming a plurality of signal lines arranged in an extending direction;
• a first cover layer arranged to cover the first metal layer in a direction of the second base surface;
• a second base layer arranged in a direction of the first base surface;
• a second metal layer arranged on the second base layer to be opposite to the first base layer;
• and
• a second cover layer arranged on the second base layer to cover the second metal layer,
• wherein the FPCB comprises, based on the extending direction, a driving area, a first fixed area, and a second fixed area, wherein the first fixed area and the second fixed area are arranged in opposite directions to each other relative to the driving area,
• wherein a thickness of the first cover layer in the driving area is different from a thickness of the first cover layer in the first fixed area or the second fixed area.

An electronic device comprising:

• a display comprising a first area and a second area;
• a first housing forming a first space on a rear surface of the first area;
• a second housing forming a second space on a rear surface of the second area;
• a hinge structure comprising a hinge housing connecting the first housing to the second housing based on the folding axis and adjusting a folding angle formed by the first housing and the second housing;
• and
• a flexible printed circuit board (FPCB) traversing the folding axis and extending from the first space to the second space in the extending direction,
• wherein the FPCB comprises:
• a driving area at least partially arranged in the hinge housing and at least partially bending in response to a change in the folding angle;
• a first fixed area extending from the driving area to the first space;
• a second fixed area extending from the driving area to the second space;
• a first base layer comprising a first base surface and a second base surface opposite to the first base surface;
• a first metal layer arranged on the second base surface and forming a plurality of signal lines arranged in an extending direction;
• a first cover layer arranged to cover the first metal layer in a direction of the second base surface;
• a second base layer arranged in a direction of the first base surface;
• a second metal layer arranged on the second base layer to be opposite to the first base layer;
• and
• a second cover layer arranged on the second base layer to cover the second metal layer,
• wherein a thickness of the first cover layer in the driving area is greater than a thickness of the first cover layer in the first fixed area or the second fixed area,
• wherein an interval between the plurality of signal lines in the driving area is greater than an interval between the plurality of signal lines in the first fixed area or an interval between the plurality of signal lines in the second fixed area.