PCB Tech - Several Types of Unqualified Circuit Boards and Analysis of Causes

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 circuit board open circuit after aging. The root cause of these commonPCB circuit board quality problems lies in the failure of the circuit board factory's production technology, backward production equipment, poor selection of raw materials, and chaotic management.

Reason 1: The production process is not good enough: The production and processing of circuit boards is a relatively high-tech industry involving electroplating, chemical engineering, machinery, and a series of interdisciplinary subjects. Each process of circuit board production and processing must be implemented in accordance with strict production processes. At the same time, each process must be equipped with corresponding testing and laboratory equipment. These process parameters and equipment can ensure the stability of the quality of the circuit board. 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. This has caused many small circuit board manufacturers to care about prices. As long as they can reduce costs, they are in terms of production technology and circuit board quality. Don't care at all. The concentration of the potion in the electroplating process is a parameter that changes from time to time. Different types of circuit boards have different electroplating process current and time. These parameters are combined to affect the quality of the circuit board. Only strict production process guidance, production according to process parameters, and

continuous laboratory inspections can ensure that the quality of the produced circuit boards is always stable. If the production is organized based on experience and quality problems occur, add the potion based on the feeling, which directly leads to the constant fluctuation of the quality of the circuit board. Customers using this circuit board will have a high repair rate, low yield, and the surface will look like a circuit board. The purchase cost of the company has been 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.

Reason 2: The choice of raw materials is cheap and inferior: the quality of the 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 the materials used by some circuit board factories are mixed, some are genuine sheets, some are marginal materials, or recycled materials to dilute the cost. The hidden danger of this is that it is not known which batch will appear. problem. Due to the different characteristics of the circuit boards, some circuit boards are not very demanding, so some side materials used in this kind of occasions do not show obvious problems, which makes many circuit board manufacturers confused by this approach, and at the same time because of the price The low cost has also won the preference of customers. It also encouraged the 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 three: backward production equipment: equipment is to ensure quality from the hardware, increase investment in equipment, make the equipment efficient, and stability is the fundamental way to improve the quality of 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 leads to some small 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 circuit board factory will be greatly increased. Once personnel flow occurs, the quality of the circuit board will fluctuate.

Reason 4: Management confusion:PCB factories have many production processes and long cycles. How to achieve scientific and orderly management while reducing management costs is a difficult problem. That is, it needs to be managed well, managed, and managed cheaply. Long-term accumulation of circuit board manufacturers. With the advancement of science and technology, especially the development of the network, it has become possible to manage the traditional circuit board factory 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.

To sum up: The quality of circuit board is a serious problem, and it is also the result of the long-term efforts of the circuit board factory, in management, integrity, investment and absorption of new technical means.