PCB News - High frequency board/circuit board quality unqualified form and reason analysis

High frequency board/circuit board quality unqualified form and reason analysis

High-frequency board/circuit board quality problems generally include short circuit and open circuit, green oil blistering, green oil shedding, substrate delamination, board warping, pad shedding, poor tinning, and open circuit after aging. The root cause of these common high-frequency board quality problems is that the high-frequency board factory does not pass the production process, the production equipment is backward, the raw material selection is inferior, and the management is chaotic.
Reason 1: The choice of raw materials is cheap and inferior: the quality of raw materials is the cornerstone of the quality of the circuit board. If the material itself is not good enough, the circuit made will appear blistering, delamination, cracking, board warping, and uneven thickness. What is more concealed now is that some high-frequency board/circuit board factories use mixed materials, some are genuine sheets, some are side materials, or recycled materials to dilute the cost. The hidden danger of this is that I don’t know which one. There will be problems with the batch. Due to the different characteristics of circuit boards, some high-frequency boards/circuit boards are not very demanding, so some edge materials used in such occasions do not show obvious problems, which makes many high-frequency board/circuit board factories like this. The practice was confused, and at the same time, because of the low price, it also won the preference of customers. It also encouraged the high-frequency board/circuit board factory to continue to take such risks. In the long run, if there is a substrate problem that leads to quality problems in the finished product, it is often a huge loss, and sometimes it is impossible to restore the company's reputation and brand. This is also the reason why more regular circuit board manufacturers will not do this.
Reason 2: Management confusion: The high-frequency board/circuit board factory has many production processes and long cycles. How to achieve scientific and orderly management while reducing management costs is a difficult problem, that is, to manage well, manage well, and manage well. Cheap, this requires long-term accumulation of circuit board manufacturers. With the advancement of science and technology, especially the development of networks, it has become possible to manage traditional high-frequency board/circuit board factories by means of network informationization. Only a breakthrough in this area can form the core competitiveness. In a poorly managed factory, the quality of its circuit boards will naturally fluctuate frequently, and various problems will emerge in endlessly and repeatedly.

Reason three: backward production equipment: equipment is to ensure quality from the hardware, increase investment in equipment, make equipment efficient, and stability is the fundamental way to improve the quality of high-frequency boards/circuit boards. With the advancement of science and technology, circuit equipment is getting faster and faster, and the equipment is getting more and more advanced. Of course, the price is getting more and more expensive. This results in some small high-frequency board/circuit board factories unable to install more expensive equipment, which leads to increased dependence on employees. The current labor cost is inherently high. Once the dependence on skilled and skilled employees is formed, the management difficulty of the high-frequency board/circuit board factory will be greatly increased. Once there is personnel turnover, the quality of the high-frequency board/circuit board will fluctuate. .
Reason 4: The production process is not good enough: high-frequency board production and processing is a relatively high-tech industry involving electroplating, chemical engineering, machinery, and a series of interdisciplinary subjects. Each process of high-frequency board production and processing must be implemented in accordance with strict production processes, and each process must be equipped with corresponding testing and laboratory equipment. These process parameters and equipment can ensure the stability of high-frequency board/circuit board quality. It is undeniable that the circuit board industry is also a polluting industry. Many practitioners and even the bosses who enter this industry are half-way renunciations, so many small high-frequency board manufacturers only care about the price. I don't care about the quality at all. The concentration of the potion in the electroplating process is a parameter that changes from time to time. Different types of high-frequency boards/circuit boards have different electroplating process current and time. These parameters are combined to affect the quality of the high-frequency boards/circuit boards. Only strict production process guidance, production according to process parameters, and continuous laboratory inspections can ensure that the quality of the produced high-frequency boards/circuit boards is always stable. If the production is organized based on experience and there are quality problems, add the potion based on the feeling, which directly leads to the quality of the high-frequency board/circuit board is always fluctuating, the customer using this high-frequency board/circuit board will have a high repair rate, and the finished product The rate is low. On the surface, it seems that the purchase cost of the circuit board is reduced. In fact, the maintenance cost of repair and repair is greatly increased. At the same time, the customer's brand is affected, which is not cost-effective in the long run.