Die motorelektronika -mark is die derde grootste toepassingsgebied van PCB after computers and communications. With cars from the traditional mechanical products, evolution, gradually developed into intelligent, informatization, mechanical and electrical integration of high-tech products, electronic technology was widely applied in the car, whether the engine system, or the chassis system, security system, information system, the interior environment system are invariably adopted electronic products. Obviously, the automobile market has become another bright spot in the electronic consumer market. The development of automobile electronics has naturally driven the development of automobile PCB.

In die huidige PCB -sleutel -toepassingsvoorwerp beklee die motor -PCB ‘n belangrike posisie. However, due to the special working environment, safety, high current and other requirements of automobiles, they have high requirements on PCB reliability and environmental adaptability, and involve a wide range of PCB technology types, which is a challenge for PCB enterprises. For the manufacturers who want to develop the automotive PCB market, they need to do more understanding and analysis of this new market.

Automotive PCB have a special emphasis on high reliability and low DPPM. Then, does our company have the technology and experience in high reliability manufacturing? Is it consistent with the future product development direction? In the process control, can you do according to the requirements of TS16949? Is lae DPPM behaal? Dit moet alles noukeurig geëvalueer word; kyk net na hierdie aanloklike koek en blindelings ingaan, dit sal die onderneming self skade berokken.

Hoe om die betroubaarheid van die motor -PCB te verbeter

The following provides some representative special practices of automobile PCB manufacturers in the testing process for the general PCB colleagues for reference:

1. Second test method

Sommige PCB -vervaardigers gebruik die ‘tweede toetsmetode’ om die fout op te spoor na die eerste hoogspanningsonderbreking.

2. Bad board anti-stay test system

More and more PCB manufacturers have installed “good board marking system” and “bad board error proof box” in the optical board testing machine to effectively avoid artificial leakage. The good plate marking system marks the tested PASS plate for the test machine, which can effectively prevent the tested plate or bad plate from flowing to the customer. Die foutbestande boks van die slegte bord is die sein dat die kassie deur die toetsstelsel oopgemaak word wanneer die PASS -bord tydens die toetsproses getoets word. Instead, when a bad board is tested, the box closes, allowing the operator to properly place the tested board.

3. Establish PPm quality system

At present PPm (defect rate permillion) quality system is widely used in PCB manufacturers. Among many customers of our company, HitachiChemICal in Singapore is the most worthy of reference for its application and the results obtained. There are more than 20 people in the factory who are responsible for the statistical analysis of online PCB quality abnormals and PCB quality abnormals returned. Die metode van statistiese ontleding van die SPC-produksieproses is gebruik om elke slegte bord en elke gebrekkige bord vir statistiese analise te klassifiseer, en gekombineer met mikrosnit en ander hulpmiddels om te ontleed watter produksieproses ‘n slegte en gebrekkige bord veroorsaak het. Volgens die resultate van statistiese data, los die probleme in die proses doelbewus op.

4. Comparative testing

Some customers used two different brands of PCB models in different batches for comparative testing, and tracked the PPm of the corresponding batches, so as to understand the performance of the two test machines, so as to choose a test machine with better performance to test automotive PCB.

5. Improve test parameters

Select higher test parameters to strictly detect this type of PCB, because if you choose higher voltage and threshold, increase the number of high voltage read leakage, can improve the detection rate of PCB defect board. For example, a large Taiwan-funded PCB company in Suzhou uses 300V, 30M and 20 Euro to test automotive PCB.

6. Check test machine parameters regularly

Na langdurige werking van die toetsmasjien, word interne weerstand en ander verwante toetsparameters afgewyk. Therefore, it is necessary to adjust machine parameters regularly to ensure the accuracy of test parameters. The test equipment is maintained and internal performance parameters are adjusted in half a year or one year in a large number of PCB enterprises. The pursuit of “zero defect” automobile PCB has always been the direction of PCB people’s efforts, but due to the limitations of processing equipment, raw materials and other aspects, so far the world’s top 100 PCB enterprises are still exploring ways to reduce PPm.