What are the characteristics of surface mount components in China PCBA factory?
What are the risks of China printed circuit boards assembly OEM, such as difficulty in confirming the authenticity of materials, unstable procurement cycle, difficulty in maintenance, capital and so on; There are many characteristics of surface mount components in China PCBA processing plant, such as less parasitic capacitance and inductance of components, so as to improve the high-frequency characteristics, which is conducive to improving the use frequency and circuit speed. Next, let's introduce it to you.
What are the risks of China PCBA OEM?
1. It is difficult to confirm the authenticity of materials
As China printed circuit boards assembly OEM manufacturers are responsible for the manufacturing of China electronic assembly components and China PCB assembly, some profit seeking China electronics manufacturing plants may purchase some fake and inferior materials in order to reduce production costs. In this case, the quality of the material can be ensured by specifying the material supplier and providing the certificate of origin of the material.
2. Unstable procurement cycle
In the whole production cycle of China PCBA processing, the material procurement is the most unstable, especially when the components used by customers are scarce, not common supplies or the demand for components is large, and the China OEM manufacturing factories have no inventory and need to take the way of ordering, which will produce uncontrollable factors.
3. Difficult maintenance
If China OEM manufacturing factories do not have strong maintenance ability, which leads to product maintenance difficulties and extended maintenance cycle, it will eventually affect the product delivery time and cause greater losses to customers.
4. Capital risk
China printed circuit boards assembly OEM mode requires processing manufacturers to help customers purchase all materials. Customers need to pay in advance, which is generally 70% of the overall payment. Then manufacturers start to purchase materials and carry out China PCB manufacturing and production process. Finally, customers pay the remaining 30% when products are shipped. As we all know, the value of China PCBA OEM service is generally high, and the amount of transaction is relatively large. In the process of cooperation between the two sides, one party's arrears are easy to lead to the fracture of the company's funds, so it increases a lot of uncontrollable risks.
China printed circuit boards assembly processing plant
Characteristics of surface mount components in China PCBA plant
1. On the electrodes of SMT components, some welding ends have no leads at all, and some have very small leads; The distance between adjacent electrodes is much smaller than that of the traditional dual in-line IC (2.54mm). The center distance of IC pins has been reduced from 1.27mm to 0.3mm; In the case of the same integration, the area of SMT components is much smaller than that of traditional components, and the chip resistance and capacitance have increased from 3.2mm in the early stage×1.6mm to 0.6mm×0.3mm; With the development of bare chip technology, BGA and CSP high pin count devices have been widely used in production.
2. SMT components are directly mounted on the surface of China PCB boards, and the electrode is welded on the pad on the same side of SMT components. In this way, there is no pad around the through hole on the PCB, which greatly improves the wiring density of the PCB prototype assembly.
3. Surface mount technology not only affects the area of wiring on the printed circuit board, but also affects the electrical characteristics of devices and components. Without lead or short lead, the parasitic capacitance and inductance of components are reduced, so the high frequency characteristics are improved, and the use frequency and circuit speed are improved.
4. It is simple in shape, firm in structure, and close to the surface of China PCB boards, which improves the reliability and earthquake resistance; When assembling, there is no lead bending or cutting. When manufacturing China printed circuit boards assembly, the through holes of plug-in components are reduced: the size and shape are standardized, and the automatic placement machine can be used for automatic placement, with high efficiency, high reliability, convenient for mass production and low comprehensive cost.
5. In the traditional sense, surface mount components have no pins or short pins. Compared with plug-in components, solderability testing methods and requirements are different. The whole surface component bears higher temperature, but the surface mount pins or end points bear lower temperature when welding compared with DP pins.
The above is the introduction of "the risk of China PCBA OEM, what are the characteristics of surface assembly components in China printed circuit boards assembly processing plant", I hope it can help you.
