PCB Technical - Reduce car PCB defects and avoid PCB CAM

The automotive electronics market is the third largest application area of PCBs after computers and communications. With the gradual evolution and development of automobiles from mechanical products in the traditional sense to intelligent, informatized, and mechatronics high-tech products, electronic technology has been widely used in automobiles, whether it is engine systems, chassis systems, Security systems, information systems, and in-vehicle environmental systems all use electronic products without exception. The automotive market has obviously become another bright spot in the electronic consumer market. The development of automotive electronics has naturally driven the development of automotive PCBs.

In today's key PCB applications, automotive PCBs occupies an important position. However, due to the special working environment,

safety and high current requirements of the car, it has higher requirements on the reliability and environmental adaptability of the PCB, and the types of PCB technology involved are also wide. This is a problem for PCB companies. Challenge; For manufacturers who want to develop the automotive PCB market, they need to do more understanding and analysis of this new market.

Automotive PCBs particularly emphasize high reliability and low DPPM. So, does our company have the accumulation of technology and experience in high-reliability manufacturing? Is it consistent with the future product development direction? In terms of process control, is it able to do well in accordance with the requirements of TS16949? Has a low DPPM been achieved? All these need to be carefully evaluated. Just seeing this attractive piece of cake and entering blindly will bring harm to the enterprise itself.

The following are some of the special practices in the testing process of some representative companies specializing in the production of automotive PCBs for the majority of PCB colleagues for reference:

Second test method

Some PCB manufacturers adopt the "second test method" to increase the rate of finding defective boards after the first high-voltage electrical breakdown.

Bad board foolproof test system

More and more PCB manufacturers have installed "good board marking system" and "bad board error prevention box" in the light board testing machine to effectively avoid human leakage. The good board marking system marks the tested PASS boards for the testing machine, which can effectively prevent the tested boards or bad boards from flowing into the hands of customers. The bad board error-proof box means that during the test, when the PASS board is tested, the test system outputs the signal that the box is opened; on the contrary, when the bad board is tested, the box is closed to allow the operator to correctly place the tested circuit board.

When you are creating a Gerber file for a printed circuit board design, it can sometimes be difficult to accurately reflect the product you want to manufacture. However, Advanced Circuits provides some useful tips that can help you reduce the possibility of PCB orders being put on hold, thereby reducing turnaround time and obtaining the required circuit boards. Some of the most common mistakes made by designers are ignoring the inclusion of aperture lists, drill files, drill lists or their Gerber files. Sometimes, the design itself may be incomplete or not meet manufacturing requirements.

Use advanced circuits to make the PCB design process easier

If you use the FreeDFM system provided by Advanced Circuits, it will be able to simplify the design and submission process. Through integration, any potential DFM issues can be viewed so that they can be resubmitted correctly and using the same interface. In this way, the design submission and manufacturing process are all completed by a professional company, so that it is possible to know whether the printed circuit board meets the requirements.