PCB News - A complete PCB circuit board production process

A complete PCB circuit board production process
The production process of PCB circuit board factory:

1. Print the PCB circuit board. Print out the drawn circuit board with transfer paper, pay attention to the slippery side facing you, generally print two circuit boards, that is, print two circuit boards on one sheet of paper. Choose the circuit board with the best printing effect among them.

2. Cut the aluminum-based copper clad laminate, and use the photosensitive board to make the whole process diagram of the circuit board. Aluminum-based copper clad laminate, that is, a circuit board covered with copper film on both sides, cut the copper clad laminate to the size of the circuit board, not too large to save materials.

3. Pretreatment of aluminum-based copper clad laminates. Use fine sandpaper to polish away the oxide layer on the surface of the aluminum-based copper clad laminate to ensure that the carbon powder on the thermal transfer paper can be firmly printed on the copper clad laminate when the circuit board is transferred. The standard for polishing is that the board surface is bright. No obvious stains.

4. Transfer PCB circuit board. Cut the printed circuit board to a suitable size, paste the printed circuit board side on the copper clad laminate, and put the aluminum-based copper clad laminate into the heat transfer machine after alignment, and make sure that the transfer paper is not misaligned when putting it in . Generally, after 2-3 times of transfer, the circuit board can be transferred firmly to the aluminum-based copper clad laminate

superior. The heat transfer machine has been preheated in advance, and the temperature is set at 160-200 degrees Celsius. Due to the high temperature, pay attention to safety during operation!

5. Corrosion circuit board, reflow soldering machine. First check whether the printed circuit board is completely transferred. If there are a few areas that have not been transferred well, you can use a black oil-based pen to repair it. Then

It can be corroded. When the exposed copper film on the circuit board is completely corroded, the circuit board is removed from the corrosive solution and cleaned, so that a circuit board is corroded. The composition of the corrosive solution is concentrated hydrochloric acid, concentrated hydrogen peroxide, and water in a ratio of 1:2:3. When preparing the corrosive solution, discharge water first, and then add concentrated hydrochloric acid and concentrated hydrogen peroxide. Be careful of splashing on the skin or clothes and wash them with clean water in time. Because of the use of strong corrosive solutions, you must pay attention to safety during operation!

6. Circuit board drilling. The circuit board needs to be inserted with electronic components, so it is necessary to drill the circuit board. Choose different drill pins according to the thickness of the electronic component pins. When using the drill to drill, the circuit board must be pressed firmly. The drill speed cannot be too slow. Please carefully watch the operator's operation.

7. Circuit board pretreatment. After drilling, use fine sandpaper to polish off the toner on the circuit board, and clean the circuit board with water. After the water dries, apply rosin to the side with the circuit. In order to speed up the solidification of the rosin, we use a hot air blower to heat the circuit board, and the rosin can solidify in only 2-3 minutes.

8. Welding electronic components. After soldering the electronic components on the board, turn on the power.

iPCB is a high-tech manufacturing enterprise focusing on the development and production of high-precision PCBs. iPCB is happy to be your business partner. Our business goal is to become the most professional prototyping PCB manufacturer in the world. Mainly focus on microwave high frequency PCB, high frequency mixed pressure, ultra-high multi-layer IC testing, from 1+ to 6+ HDI, Anylayer HDI, IC Substrate, IC test board, rigid flexible PCB, ordinary multi-layer FR4 PCB, etc. Products are widely used in industry 4.0, communications, industrial control, digital, power, computers, automobiles, medical, aerospace, instrumentation, Internet of Things and other fields.