The automotive electronics sector has emerged as the third-largest application area for printed circuit boards (PCBs), following computers and communications. As vehicles have transitioned from traditional mechanical systems to advanced, intelligent, and integrated smart devices, electronic technology has become deeply embedded in every aspect of modern automobiles. From engine control units and chassis systems to safety mechanisms, infotainment systems, and climate control, electronics are now an essential component. This shift has made the automotive market a significant growth driver in the broader electronics industry, with the demand for automotive PCBs steadily rising.
Automotive PCBs hold a crucial position among key PCB applications today. However, due to the demanding environments in which they operate—such as high temperatures, vibrations, and electrical stress—these PCBs must meet stringent reliability and environmental adaptability standards. The manufacturing process involves a wide range of technologies, making it a complex challenge for PCB manufacturers. For companies looking to enter this market, a thorough understanding of its unique requirements is essential before making any strategic moves.
One of the main concerns in automotive PCB production is achieving high reliability and minimizing defects. Many companies are asking whether they have the necessary expertise and technological capabilities to meet these demands. Are their processes aligned with future trends? Is their quality control compliant with standards like TS16949? And most importantly, have they successfully achieved low DPPM (Defects Per Million) rates? These questions require careful evaluation, as entering the market without proper preparation can lead to costly mistakes.
To address these challenges, many leading automotive PCB manufacturers have implemented advanced testing and quality assurance methods. Here are some of the most effective practices currently used:
1. **Second Test Method**
Some PCB manufacturers use a "second test method" that involves a high-voltage breakdown test as the first step. This approach enhances defect detection by identifying potential issues early in the process.
2. **Good Board Marking System & Bad Board Error Prevention Box**
Many companies now integrate these systems into their testing machines. The good board marking system identifies and separates passed boards, preventing defective ones from reaching customers. The bad board error prevention box signals when a faulty board is detected, ensuring operators handle the boards correctly.
3. **PPM Quality Management System**
The PPM (Parts Per Million) quality system is widely adopted in PCB manufacturing. Companies like Hitachi Chemical in Singapore have set benchmarks with their detailed statistical analysis of defects. By using SPC (Statistical Process Control) techniques, they track and analyze each defective board, helping identify root causes and improve processes accordingly.
4. **Comparative Testing Method**
Some clients conduct comparative tests between different PCB brands or types to evaluate performance and select the best test equipment for automotive PCBs. This helps ensure higher accuracy and reliability during testing.
5. **Optimized Test Parameters**
Increasing test parameters such as voltage and threshold levels can significantly improve defect detection. For example, a major PCB manufacturer in Suzhou uses 300V, 30MΩ, and 20Ω for testing automotive PCBs, enhancing the likelihood of identifying hidden flaws.
6. **Regular Calibration of Test Machines**
Over time, test machine parameters may drift due to wear and tear. Regular calibration ensures accurate readings and consistent results. Many top PCB manufacturers schedule maintenance and parameter adjustments every six months or annually to maintain precision.
While the goal of achieving "zero defects" in automotive PCBs remains a priority, it's clear that overcoming limitations in materials, equipment, and processes is an ongoing challenge. Despite these hurdles, the global PCB industry continues to innovate and refine its methods to meet the growing demand for reliable, high-performance automotive electronics.
PZT Piezoelectric Cylinders/Tubes
Yuhai company develop and produce of various tube/cylinder sizes, bearing variety of electrode and metallisation configurations. The tubes is fabricated from various published and additional custom in-house Piezoelectric Material formulations for applications such as high power, sensitivity, stability needs.
Features
- · Choice of metallisation (Silver, Nickel, Gold and others on request)
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aApplications include
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Tubes
Height:
1-100mm
OD:
6-180mm
ID:
5-150mm
Wall: 0.5-15mm
Piezo Tube,Piezoelectric Tube,Piezo Electric Tube,Piezo Ceramic Tubes
Zibo Yuhai Electronic Ceramic Co., Ltd. , https://www.yhpiezo.com