PCB Technical - Circuit board processing: the reason for PCB proofing first

Circuit board processing: the reason for PCB proofing first

I believe that customers who have processed and produced PCB circuit boards understand that when producing PCB circuit boards in batches, PCB proofing is required before mass production. Circuit board proofing is not only to understand the quality response of the product in advance, but also to reduce formal production. The time is bad, so it is an indispensable link to carry out PCB proofing with guaranteed quality in advance. Of course, the two parties must communicate the details and specific parameters in-depth before the proofing, in order to promote the successful proofing and lay the foundation for subsequent production. Let's work with the editor to understand the purpose of proofing:

1. Can judge the strength level of the circuit board manufacturer's production

Effective PCB proofing before production can also clearly understand the strength of the circuit board manufacturers, especially the manufacturers that the two parties have not cooperated before, can determine the strength level of the circuit board manufacturers in production through the proofing, only the ability is equivalent and can be processed Only the circuit board manufacturers that meet the technical requirements can better meet the company's long-term cooperation and high-quality processing and production of PCB boards.

2. It can reduce the defective rate of PCB circuit board mass product production

Usually the PCB board processing and production volume is large. In order to ensure that mass production goes smoothly without quality problems and reduce the defect rate, it is very necessary to carry out the circuit board proofing process before production. After all, the processing of PCB boards needs to go through complicated processing procedures, and there should be no errors in every process or processing link. After successful proofing, professional technicians will effectively test the samples. After passing various professional tests, it is determined that there is no problem. Can be mass-produced.

3. Can lay the foundation for batch processing in the future

PCB proofing is also in order to understand the performance and functional response of new products in advance. Through proofing, it can effectively lay a good foundation for mass production in the future. The calculation of the corresponding material cost can also optimize the shortcomings in advance. All of these need to be proofed. Effective processing of the link can reduce the occurrence of various unprepared problems during mass production.

It can be seen that it is very necessary to conduct PCB proofing before the formal production. It is also the first step for successful cooperation with processing enterprises. Therefore, it is necessary to choose a reasonable price circuit board manufacturer for proofing, and provide the material size or size requirements for plate processing with the manufacturer., After the two parties have communicated and negotiated, the formal PCB proofing will be carried out, which is also to lay a good foundation for better cooperation between the two parties in the later period.

What are the requirements for the size of the vias in the production of PCB boards

PCB boards and systems are developing in the direction of higher density, faster speed, and greater heat generation. In addition, the problems caused by the overheating of the circuit board are getting more and more attention, and thermal simulation will become an indispensable step in the electronic PCB design process. The traditional thermal simulation test is mainly in the product regarding the choice of the size of the PCB board via hole. Usually the R outer diameter-r inner diameter >=8mil (0.2mm)

Generally, it is recommended that the outer diameter is 1MM, the inner diameter is 0.3-0.5MM, and the more dense lines, the outer diameter is 0.6MM, and the inner diameter is 0.4-0.2MM.

What is the reason for PCB proofing first during circuit board processing and production (Figure 2)
The outer diameter can be made larger for the large current, and the hole can be made smaller. However, PCB manufacturers generally recommend using 0.5MM inner diameter, because they are not easy to break with a 0.5 drill bit. The drill bit below 0.5mm is easy to break.

However, as electronic products become lighter, thinner, shorter, and smaller, many electronic products have been compressing design parameters in order to reduce the size of the board. As a result, there is no place to place 0.3mm vias, and they can only be designed to be 0.15-0.25. For holes of about mm, it is more difficult to make such holes. If it is not necessary, try not to design holes of this size.

Generally speaking, the via hole is designed to have a diameter of 0.3mm, and most PCB factories can meet the production requirements. If it is set below 0.3mm, many factories cannot produce due to the limitation of production equipment. Even if some factories can produce, the scrap will be very large. The relative cost will increase.