1, a circuit board. Draw a circuit board with the proper transfer paper, sliding side note in front of you, two circuit boards usually a sheet of paper printed two boards. Choose one of the best in the manufacture of printed circuit boards.
2, cutting the CCA to the board with a photographic plate illustrations. CCA, the copper foil on both sides of the circuit, the circuit of copper on the size of the cut, not too big to save material is coated.
3, Pre-CSF. CCA determined using a fine sandpaper to polish the surface of the oxide layer pipe systems for heat transfer toner to paper printed on laminated copper, polished surface of a plate light right level, not sure of meaningful tasks.
4, the transmission of the circuit. The printed circuit cut into appropriate size, the printed circuit on the side of the CDC, the CCA in the schedule provided for a machine with a good heat transfer, the transfer paper in the time we need to ensure that n 'there is no shift. Usually 2-3 times after the transfer, the circuit can be a very solid transfer to the CCA. The heat transfer machine was preheated in advance, the set temperature to 160-200 degrees Celsius, due to the high temperatures, safety!
5, the corrosion of pipes, the reflow soldering machine. First, check whether the circuit is completed the transfer, so few places you can not transfer oil pumps with black spots. Then you can map an open circuit corrosion and copper film is not completely burned, it will remove the caustic solution to clean the circuit so that a circuit on the best corrosion protection. The composition of the etching solution to concentrated hydrochloric acid, concentrated hydrogen peroxide, water, the ratio of 1:2:3 in the preparation of the etching solution, the first round on the water coupled with concentrated hydrochloric acid, hydrogen peroxide concentration, when the operation of hydrochloric acid, concentrated hydrogen peroxide or corrosive fluid is not properly focused on skin or clothing should be sprayed immediately with clean water, through the use of strong liquor, should the company pay attention to safety!
6, circle drill. PCB electronic components is used, it is necessary for the drilling of a circuit. To select components on the thickness of the pen on different drill rigs in operation, the circuit after a certain stability, drilling may be too slow is not open, please read carefully to use for the operating personnel.
