Flexible circuit board and electronic device

An electronic device, comprising:

• a flexible circuit board comprising:
• a first area and a second area;
• a signal layer located in the first area and the second area, and comprising a first ground trace;
• a reference layer located in the first area and stacked with the signal layer;
• a first shielding layer located in the first area and stacked on a side of the signal layer that faces away from the reference layer;
• and
• a second shielding layer located in the second area and stacked with the signal layer;
• wherein a first end of the first ground trace is located in the first area, and is electrically connected to the first shielding layer and the reference layer;
• and a second end of the first ground trace is located in the second area, and is electrically connected to the second shielding layer.

An electronic device, comprising:

• a first housing;
• a second housing;
• a first circuit board connected to the first housing;
• a second circuit board connected to the second housing;
• a hinge mechanism comprising a first metal hinge cover and located between the first housing and the second housing, wherein the first housing and the second housing are rotatably connected to the hinge mechanism;
• and
• a flexible circuit board comprising a third area, a fourth area, a fifth area, a signal layer, a reference layer, and a third shielding layer;
• wherein
• the third area is located between the fourth area and the fifth area, the fourth area is connected to the first housing, and the fifth area is connected to the second housing;
• the signal layer is located in the third area, the fourth area, and the fifth area;
• the reference layer is located in the fourth area and the fifth area, and is stacked with the signal layer;
• the third shielding layer is located in the fourth area and the fifth area, and is stacked on a side of the signal layer that faces away from the reference layer;
• and
• the first circuit board is electrically connected to the fourth area, the second circuit board is electrically connected to the fifth area, the first metal hinge cover covers a part of the flexible circuit board that is located at least in the third area, and the first metal hinge cover is electrically connected to the reference layer.