Since the processing speed of the internal core processor of the mobile phone is growing rapidly, and the performance of the external components has also improved due to the improvement of the core processor performance, the specifications of the external components have also been improved. For example, the camera module increases the pixels, but also requires a larger amount of data transmission; the LCD display module increases the LCD display pixels, making the picture more detailed and perfect, but also requires a larger amount of data transmission.

　　How to solve a larger amount of data transmission than in the past, it is generally used to increase the number of data transmission channels of the traditional flexible circuit board connection line, thereby increasing the transmission volume. In addition, because the optical fiber is used for optical signal transmission, the main advantage of optical signal transmission is that it is not subject to electromagnetic wave interference (EMI), and the speed of light is faster than the speed of electricity, so the data transmission using optical fiber is much faster than copper wire transmission. .

　　Optical fiber circuit board

　　In view of this, it is necessary to provide a fiber optic circuit board and a manufacturing method of the fiber optic circuit board with a small overall height and low optical transmission loss.

　　An optical fiber circuit board includes a flexible base material, the flexible base material includes a base plate, an adhesive layer and a copper layer on the base plate, and the copper layer is provided on the base plate through the adhesive layer, Part of the copper layer is etched away and disposed, and the flexible optical waveguide is used to transmit optical signals.

　　A method for manufacturing an optical fiber circuit board, comprising the steps of: providing a flexible base material and cutting the flexible base material, the flexible base material comprising a base plate and a copper layer arranged on the base plate; opening holes on the flexible base material and coating the inner wall of the hole; setting a photosensitive layer on the soft substrate after the coating is completed; exposing and developing the photosensitive layer to form a bare copper area; etching the copper layer on the bare copper area to form a waveguide area; removing redundant A flexible optical waveguide is arranged in the waveguide area and an insulating layer is attached; an optical window is opened corresponding to the flexible optical waveguide to expose the flexible optical waveguide.

　　Compared with the prior art, the optical fiber circuit board of this embodiment uses the optical waveguide to transmit signals to adapt to the capability of high-speed signal transmission; in addition, the flexible optical waveguide and the flexible substrate can be made together to achieve a smaller volume, Reduce the cost of separate optoelectronic assembly and the alignment problem during assembly, thereby reducing transmission loss.

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