There are different Quality Class Standards in the industry. Most commonly followed is class 1 & 2. Class 1 is for General Electronic Products and for testing and verification of Designs. Class 2 is for Dedicated Service Electronic Products such as communication equipment,sophisticated business machines, instruments where high performance and extended life is required and for which uninterrupted service is desired. Class 3 products are used in certain types of medical, aeronautics, and military applications for which uninterrupted and high reliability service is required.

In the short term, the copper clad laminate industry is in a price increase cycle, and the downstream demand boom drives the company's single-quarter profit margin upward. In the medium and long term, the PCB industry's supporting facilities will force upstream domestic manufacturers to expand production. In 2020, the year-on-year growth rate of capital expenditure of PCB listed companies will return to a high level. A new era.

Defects AOI can cover primarily come in soldering and components categories. In terms of soldering, defects can range from open circuits, solder bridges, solder shorts, insufficient solder to excess solder. Component defects include lifted lead, missing component, misaligned or misplaced components.

With the rapid development of mobile phones, electronics, and communication industries, it also promotes the continuous growth and rapid growth of the PCB circuit board industry. The more people demand for the number of components, weight, precision, material, color, reliability, etc. Come higher.