PCB News - What are the requirements of the circuit board factory for product quality?

The development of science and technology has made the industry segment more and more obvious. The electronics industry is currently the most thoroughly globalized and market-oriented field. The pursuit of high-tech and low-cost is an inevitable trend in the development of the electronics industry. Only with higher products With the advantages of quality and low cost, the quality of the circuit board factory is the quality level of the product, which is a collection of quality, reputation, responsibility and culture. Circuit board factory requirements usually have the following aspects:

(1) Appearance requirements

PCB processing plants usually require more stringent appearance in terms of appearance. The appearance requires that the surface be free of pollution, inclusions, fingerprints and oxidation, so as not to affect the solderability and insulation. The color of the solder mask is consistent, and there is no peeling, omission, offset, or oil leakage to prevent the welding from being affected. The edge of the board is smooth, without bumps or burrs, so as not to affect the assembly size and insulation. The wire is uniform, without over-corrosion, chipping, and residual copper, so as not to affect the electrical performance. The marking symbols are clear and unambiguous to read, so as not to affect assembly and maintenance. There are no scratches on the surface to avoid affecting the welding assembly and electrical performance. There is no blistering or delamination between conductors or insulating layers, especially multilayer boards, to avoid affecting mechanical and electrical properties.

(2) Electrical performance requirements

It is very important to have a suitable electrical clearance between the wires of the multilayer circuit board. The setting of the appropriate line spacing can prevent flashing and breakdown between the relevant conductors in the PCB processing product work, and can smoothly Passed the review of relevant product safety standards. In the industrial standards and safety standards of circuit board PCB products, different working voltages, different applications and other factors have different regulations on the electrical clearance and creepage distance between conductors.

(3) Mechanical performance requirements

Before opening the circuit board, the copper clad laminate must be baked to ensure that the water vapor volatile resin in the board is completely cured; when opening the material, strictly follow the latitude and longitude directions in the opening instructions; when laminating and typesetting, follow the latitude and latitude of the circuit board processing board When the direction is open, first distinguish the latitude and longitude directions when typesetting, and then typesetting according to the differentiated longitude and latitude directions, to ensure that the latitude and latitude directions are consistent, and it is not allowed to adjust the cold pressing time privately, and record it to ensure that the internal stress of the board is fully released and the resin is fully cured; When the characters of the circuit board are baked at high temperature, the shelf needs to be adjusted according to the size of the board. When inserting the shelf, the board is not allowed to be bent or twisted. If the size is different, a separate shelf needs to be inserted for baking.

(4) Environmental resistance and other performance requirements

Multilayer circuit boards have environmental resistance, mildew resistance, humidity resistance, cooking resistance, temperature shock resistance and other properties. The formation of PCB Allegro product quality runs through the entire process of product formation, and the quality of PCB products is related to the entire manufacturing process. Every circuit board factory should pay special attention to quality issues. Quality is produced, not tested. Think of yourself as the consumer of the previous process and the next process as your customer. Behind each circuit board is a group of quality assurance personnel who are silently conducting quality inspections. A complete quality control system is required by every PCB factory.