本发明提供一种柔性电路板，可应用于高频信号传输，包括：一绝缘层，具有第一表面及与该第一表面相对的第二表面；一线性信号线，形成于绝缘层的第一表面，线性信号线的远离绝缘层的表面形成一金属镀层，金属镀层的厚度小于线性信号线的厚度；多条接地线路，也形成于绝缘层的第一表面，且平行配置于线性信号线的两侧；一线路图形，形成于绝缘层的该第二表面；以及一电磁遮罩层，覆盖于线性信号线与多条接地线路之上；其中，金属镀层的电导率大于线性信号线的电导率。本发明还包括上述柔性电路板的制作方法。

The present invention relates to a flexible circuit board. The flexible circuit board can be used to transfer high-frequency signal. The flexible circuit board includes an insulating layer, a linear signal line, a number of ground lines, circuit pattern and an electromagnetic shielding layer. The insulating layer has a first surface and a second surface. The second surface is opposite to the first surface. The linear signal line is formed on the first surface of the insulating layer. A metal coating is shaped on a surface of the linear signal line. The surface is far away from the insulating layer. The thickness of the metal coating is less than the thickness of the linear signal line. The ground lines are formed on the first surface of the insulating layer. The ground lines are parallel to the linear signal line and lied in the two sides of the linear signal line. The circuit pattern is shaped on the second surface of the insulating layer. The electromagnetic shielding layer is covered on the linear signal line and the ground lines. The electric conductivity of the metal coating is greater than the electric conductivity of the linear signal line thereof. The present invention also relates to a method for manufacturing the flexible circuit board.