Printed circuit board

According to an example, a device may comprise a printed circuit board. The printed circuit board may further comprise a first layer and a second layer. The first layer may comprise a first material and the second layer may comprise a second material. In some examples, the first layer may further comprise at least one mounting hole surrounded by a third material at a thickness equal to a thickness of the first layer, and the first material may be electrically isolated from the third material. In some examples, the printed circuit board may be mated to a light guide assembly for a touchscreen system. 根据个示例，设备可以包括印刷电路板。所述印刷电路板还包括第层和第二层。第层可以包括第材料，第二层可以包括第二材料。在些示例中，第层可以进步包括至少个由第三材料围绕的安装孔，所述第三材料的厚度等于第层的厚度，并且第材料可以与第三材料电隔离。在些示例中，印刷电路板可以配合到用于触摸屏系统的导光组件。