quality assurancerequirement

Automobile pcb manufacturers shall abide by the rules of ISO9001. PCB manufacturers fully conform to the ISO9001: 2008 quality management system and strive to abide by the most stringent specifications in manufacturing and assembly.

Automobile products have their particularity. In 1994, Ford, General Motors and Chrysler together established a quality control system QS9000 in the automotive industry. In the early 21st century, with the compatibility of ISO9001 specification, a new quality control system in the automotive industry, namely ISO/IATF16949, was published.

ISO/IATF16949 is a set of technical regulations for the global automotive industry. Based on ISO9001 and the special requirements of the automobile industry, it focuses more on defect prevention to reduce quality shake and waste in the automobile parts supply chain. When implementing ISO/IATF16949, it is necessary to pay special attention to the following five main tools: PPAP (approval process for consumer parts), and regular products should be approved by customers before or after mass consumption; APQP (Advanced Product Quality Plan): before consumption, the quality plan and previous quality analysis should be stopped, and then the FMEA (Analysis of Problem Forms and Effects) should be stopped to analyze and propose measures to avoid potential problems of products. MSA (Analysis of Measurement System) must analyze the changes of measurement results to confirm the reliability of measurement. SPC (Statistical Process Control) controls the consumption procedures and uses statistical techniques to change the product quality. Therefore, the first step for PCB manufacturers to enter the automotive electronics market is to obtain the IATF16949 certificate.

The basic requirements of automobile pcb performance

a. High reliability

Automobile reliability mainly comes from two aspects: life span and environmental resistance. The former refers to the fact that normal operation can be guaranteed within the service life, and the latter refers to the fact that PCB functions remain unchanged when the environment changes.

In the 1990s, the average life of automobiles was 8-10 years, and now it is 10-12 years, which means that both automobile electronic systems and PCBs should be within this range.

In the process of application, the automobile shall be affected by climate change, from extremely cold winter to extremely hot summer, from sunshine to rain, as well as environmental changes caused by temperature rise caused by its own driving. In other words, automotive electronic systems and PCBs must accept a variety of environmental challenges, including temperature, humidity, rain, acid mist, vibration, electromagnetic interference and electric drift surge. In addition, because PCB is assembled in the car, it is mainly affected by temperature and humidity.

b. Light weight and small volume

Light and compact cars are conducive to energy conservation. Lightweight comes from reducing the weight of each ingredient. For example, some metal parts are replaced by engineering plastic parts. In addition, automotive electronic equipment and automotive pcb should be miniaturized. For example, the car application in the volume of ECU (electronic control unit) was about 1200 cm3 since 2000, while it was less than 300 cm3 after four landings. In addition, the starting gun has changed from a mechanical gun connected by a wire to an electronic gun connected by a flexible wire with a PCB inside, and its volume and weight have been reduced by more than 10 times.

The lightweight and miniaturization of automotive pcb comes from the increase of density, the decrease of area, the decrease of thickness and multi-layer.