Smart cars and electric cars stimulate PCB usage in cars
 
Taiwan's global manufacturing technology for printed circuit boards should be the world's leading position. The actual output will be mainly used in consumer electronics carrier boards. The investment in automotive electronics industry is still less demanded than consumer electronics, but As the market for smart cars, self-driving cars, and all-electric vehicles tends to be hot, the number of companies developing PCB products or specific technologies for vehicles will gradually increase.
 
For the PCB, it is basically a carrier board that carries various electronic components and connects application modules in series. It is a supporting platform for electronic components, in which a key electronic component is connected by a metal film that etches a conductive circuit.
 
In terms of traditional PCBs, the use of printed methods to retain reserved lines, etch away unnecessary metal foil with chemical agents to form the conductive lines and drawings required by the circuit board, is also known as the printed circuit board, new In the pursuit of miniaturization of the first generation of electronic products, the circuit board design must also be reduced in size. Therefore, the new generation of small circuit boards or high-density carrier boards are manufactured using more precise processes and use the type printing with an etching resist. With exposure and development treatment, a finer line etching process is performed.
 
Automotive PCB material requirements and verification standards are higher
 
Although the circuit boards and electronic component carrier boards used in general consumer electronics can be directly used for electronic purposes on vehicles, they can also maintain normal operation, but the practice cannot be directly replaced because automotive electronics depends on the installation location, purpose and stability requirements of the subsystem Different requirements for circuit board materials and processes will be very different.
 
It is used in in-vehicle electronic equipment such as driving information systems and general-purpose in-vehicle telematics. The use of highly reliable and reliable 1.6mm-thick PCBs can achieve the use of general in-vehicle electronic equipment with minimal material and process adjustments. Claim.
 
In addition, for vehicle images and engine power control units that are related to the safety of the vehicle, the PCB itself must add more verification methods for environmental conditions, such as cold and hot shock tests, high-temperature / high-humidity environment deviation tests, etc. Can withstand the performance of PCB materials with higher environmental changes, to avoid circuit failures or material variations that affect the correct operation of electronic components due to changes in environmental conditions due to circuit board functions.
 
Self-driving cars and smart cars need high-frequency circuit boards
 
Another development direction is for the wireless transmission and Internet of Vehicles applications required by various smart cars and electric vehicles, and the production requirements of PCBs for vehicles, especially the high-frequency and high-frequency applications required for antenna applications of millimeter-wave radars. Car PCB used in the frequency band.
 
In view of the high-frequency application conditions of automotive PCBs, the technical indicators concerned not only require the product's tolerance to huge changes in environmental conditions, but also have higher requirements for transmission losses, special substrates, and composite structural processes. However, it is quite difficult to meet the low-cost requirements of mass production under complicated conditions.
 
In addition, for safety subsystems such as various control subsystems in the brake and engine rooms, for electronic circuits used in cars for many years, in addition to various thermal and thermal shock tests, high humidity tests, etc., verification must be checked on the PCB. The cracking state of the welding shear must be limited to the required condition value range, and at the same time, it can also ensure that the electronic components installed and maintained can maintain the normal and stable joint state under the harsh operating environment.
 
For high power and high temperature, special vehicle PCB support is required
 
Some high-end or more application conditions may use automotive PCB materials such as ceramics or other special substrates, but in fact products made of such special substrates are not cheap. In order to reduce costs, the carrier board Weight, how to make the carrier board based on organic materials also achieve the characteristics of the special substrate circuit board, while maintaining low cost and optimization of weight is quite difficult.
 
In the advanced high-end automotive circuit boards, the fine through-hole specifications are cited. In order to reduce the size of the electronic control module and the size of the electronic control module, the automotive PCB adopts a multi-layer board design in response to the possibility of connecting and maintaining the best use conditions of the BGA components. It is also quite common. The use conditions such as 6-layer boards will not be lower than the requirements of general consumer electronics. The only difference is that the verification and retest standards for vehicle carrier boards are higher.
 
For the increasing production demand of electric vehicles and all-electric vehicles for automotive electronics, the chance of integrating a large number of power components or high-heating components in the circuit board in the battery high-power high-power control module or related electronic subsystem is very high. In order to allow the PCB itself It can also achieve the effect of heat dissipation. This special application of automotive PCB also has different methods to improve the heat dissipation effect of the overall subsystem, for example, by embedding "copper" in the inner layer of the PCB (Cu inlay PCB), and the traditional PCB itself The heat dissipation auxiliary effect provided by the composite material substrate is more obvious.