Flexible circuit board. Its core layer is an ultra-thin polymer film. First, the polymer film is sandwiched between two copper sheets by a machine.

  The upper machine is first uniformly cut into rectangular sheets, and then separated by a laminate to form a stack.

  After being sent to the vacuum pump box, the layers are closely sucked together, and then sent to the high temperature and high pressure box for several hours. Since the polymer film located in the middle layer itself has a coating of heat activated adhesive, the original 3 The layers will bond together.

  The squeezing plate is then cut into fixed-size boards and drilled into small holes for convenient assembly, and then a fourth layer of photosensitive film is adhered to the surface of the board by a film applicator.

According to the customer's needs, the integrated circuit diagram is drawn by the computer, and then the board is placed in the exposure machine, and the computer controls the machine to perform laser scanning on the photosensitive layer. The surface of the irradiated photosensitive layer reacts and hardens, so that the underlying copper layer can be protected from pickling.

  After cleaning the area not irradiated by the laser with an acid washing machine, the copper layer left on the entire polymer film is the integrated circuit drawn by the original computer. Then use a sticky roller to remove surface dust and then place the fifth insulating layer.

  Finally, the entire circuit board is separated by plastic paper and laminated sheets, and then placed in a vacuum pump box to closely suck the layers together, and then sent to a high temperature and high pressure box for several hours.

  When the board cools down, it can be manually placed in the mold. After the specified shape is formed by the punch, a flexible circuit board is officially completed.
Our official website:http://www.lhd-pcb.com