Automotive PCBA is carefully designed and manufactured to ensure its perfect operation. Printed circuit board manufacturers should consider various factors to ensure high-quality, reliable, strong, and durable car PCB.
Creating a schematic design is the first step in the automotive circuit board design and manufacturing process. In this process, since auto electronic design and manufacturing involve a lot of information, the specific information includes the application of automotive electronics, the type of onboard electronic system, the type of PCB, the number of layers, the size, and the materials of components used. All information for manufacturing automotive electronics PCBA must be accurate to be used in the initial design and manufacture of automotive electronic circuit boards.
Review the BOM for the design and manufacture of automotive PCB assembly. Check that all listed components are consistent with the schematic and design specifications. Ensure that all components are listed and not missing. Identify if there are acceptable alternative components and indicate them in the BOM. This will provide a backup plan in case of problems in the supply chain. By fully reviewing the BOM list, you can ensure the correctness and availability of all components and materials, guaranteeing smooth manufacture and automotive PCB assembly.
After the schematic design, component selection according to the circuit board design requirements is an important step in designing automotive PCBA boards. Select appropriate electronic components and confirm the availability and compatibility of car circuit board, vehicle-mounted electronic PCB board fabrication, and vehicle-mounted PCBA manufacturing.
Since in-vehicle PCBA products usually need to meet the requirements of high reliability and long life, components that can withstand the automotive working environment, such as high temperature, low temperature, humidity, vibration, etc., are selected, and the specification parameters of each component, such as voltage, current, power, package type, etc., are checked, especially for components with high reliability requirements for automotive electronic systems. At the same time, components that meet automotive electronics industry standards, such as AEC-Q100, AEC-Q200, etc., should also be selected to ensure the reliability and safety of components in automotive applications.
The most basic PCB, with components concentrated on one side and wires relatively concentrated on the other side. Mainly used in simple automotive control units, vehicle-mounted electronic systems and other low-cost circuit boards.
There are wiring on both sides of the substrate, and there is an appropriate circuit connection between the two sides. The circuits on the upper and lower sides are connected through vias, which can be used for more complex circuits
It is composed of three or more conductive layers, and the layers are connected through inner layer vias. It is suitable for high-density and complex electronic systems, such as the central control system and advanced driver assistance system (ADAS) of automobiles.
| 8-layer Car Navigation System Printed Circuit Board Design | ||
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Number of layers | 8L |
| Material | High TG material mixed press board, high heat resistance, can reduce the floating of PCB plate during infrared hot melting, welding and thermal shock | |
| Board thickness | 1.0mm+0.1mm | |
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Copper thickness |
10Z | |
| Surface treatment | Immersion gold | |
| Thickness | 0.05um | |
| Outer layer line width/line spacing | 95/90um | |
| Minimum aperture | Mechanical hole: 0.2mm | |
| Board thickness to board thickness to aperture ratio | 5:1 | |
HDI PCB has the characteristics of high density, fine wire, small aperture, etc. It uses micro-hole technology and fine wiring to achieve higher component density and smaller board size. It is suitable for complex in-vehicle electronic devices such as in-vehicle displays and navigation systems.
| Automotive Electronics 5-level HDI Circuit Board | ||
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Number of layers | 12L |
| Material | Shengyi S1000-2M, with excellent electrical and mechanical properties, is commonly used in PCB manufacturing and is suitable for the manufacturing needs of vehicle-mounted systems | |
| Board thickness | 1.8+0.18mm | |
|
Copper thickness |
10Z | |
| Surface treatment | Immersion gold | |
| Thickness | 0.05um | |
| Outer layer line width/line spacing | 127/127um | |
| Minimum aperture | Laser hole: 0.1mm; Mechanical hole: 0.2mm | |
| Board thickness to board thickness to aperture ratio | 9:1 | |
Any PCB with a copper layer thickness of 30z or above can carry large current and high voltage, and has good heat dissipation. The power management system of the car and the battery management system of the electric car usually use heavy copper PCB.
| 4-layer Car Electronic Heavy Copper PCB Fabrication | ||
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Number of layers | 4L |
| Process | Impedance + thick copper | |
| Board thickness | 1.2 mm | |
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Material |
FR4 |
|
| Surface treatment | Halting | |
| Inner layer line width | 15mil | |
| Outer layer line width/line spacing | 5.5/11mil | |
| Minimum aperture | 0.3mm | |
The composite printed circuit board consists of three parts: metal substrate, insulating dielectric layer and circuit layer. It has the characteristics of good heat dissipation and good machining performance. It is suitable for other automotive power applications such as on-board LED lighting, car headlights, car light control systems, etc.
| 9-layer Metal Substrate PCB for Automotive Lighting Control System | ||
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Process | Blind hole |
| Board thickness | 5.0mm | |
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Material |
FR4 、TG170 | |
| Surface treatment | Immersion Gold | |
| Inner layer line width | 9/7mil | |
| Outer layer line width/line spacing | 9/4mil | |
| Minimum aperture | 0.3mm | |
High-frequency PCB is designed to handle high-frequency signal transmission and is commonly used in automotive electronic systems such as radar, communication and wireless transmission.
| Vehicle Embedded System High Frequency PCB Board | ||
|
Number of layers | 5L |
| Material | RO4350B+TU768 | |
| Board thickness | 1.6 mm | |
|
Copper thickness |
1oZ | |
| Surface treatment | Immersion Gold | |
| Thickness | 0.05um | |
| Outer layer line width/line spacing | 100/100um | |
| Minimum aperture | 0.2mm | |
High-speed PCB is designed for high-speed signal transmission, ensuring signal integrity and low latency. It is commonly used in automotive infotainment systems, in-vehicle networks, and data communication systems.
| Automobile Driving Assistance System High-speed Printed Circuit Board Fabrication | ||
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Number of layers | 14 L |
| Material | IT170GRA1TC | |
| Board thickness | 1.6+0.05mm | |
|
Copper thickness |
1oZ | |
| Surface treatment | Immersion Gold | |
| Thickness | 0.05um | |
| Outer layer line width/line spacing | 75/75um | |
| Minimum aperture | 0.2mm | |
Prepare corresponding motherboard materials for different types of automotive circuit board assembly manufacturing requirements, single-sided PCB, double-layer PCB, multi-layer PCB, HDI board PCB, thick copper board PCB, metal substrate PCB, high-frequency PCB, high-speed PCB
Transfer the circuit design graphics to the photo-drawing film to generate the circuit pattern. Align the photo-drawing film with the PCB substrate and expose it. After development, only the required circuit graphics are retained.
Remove excess copper to form a circuit.
Drill through holes and blind holes on the PCB according to design requirements. These holes are used for interlayer connection and component pin insertion
Electroplating treatment is performed on the PCB surface, such as tin plating, gold plating, etc., to enhance welding performance and corrosion resistance. At the same time, component identification and other markings are printed on the PCB surface to facilitate component assembly and maintenance.
After the automotive electronic finished product assembly is manufactured, the automotive PCBA manufacturer conducts comprehensive functional testing to ensure that the automotive electronic PCBA board can meet the design requirements and reach the standards of high reliability and high performance.
Test the power supply performance of the automotive electronic PCBA under different working voltages, including power startup, voltage regulation and overcurrent protection functions, to ensure the integrity and stability of the signal
Perform functional testing on the automotive control board PCB Assembly to ensure that each control function works properly, including engine control, body electronic control, etc. Test the communication interface between the PCBA and other on-board electronic equipment, such as LIN bus, Ethernet, etc., to ensure the correctness and reliability of data transmission.
Place the PCBA in a high and low temperature cycle environment to test its performance and reliability under extreme temperatures. Simulate the vibration environment generated during the driving of the car to ensure that the PCBA can work normally under the vibration environment.
Repair the faulty PCBA and retest it to ensure that the problem has been solved.
After the automotive PCBA products pass the functional test, the qualified PCB products are cleaned, packaged, and ready to be delivered to customers.
Use different packaging materials, such as anti-static packaging bags to package PCBA products to avoid static damage to products; you can also use foam, bubble pads and other shockproof materials to ensure that the PCBA is not physically impacted during transportation.
SCSPCBA not only has professional PCBA manufacturing capabilities but also has a strict delivery process, confirming order information with customers, including product quantity, specifications, delivery address, etc., to ensure that there are no errors. Through the tracking system of the logistics company, the transportation status is monitored in real-time, and the customer is notified of the dynamics of the goods promptly. As a professional automotive PCBA manufacturer, SCSPCBA provides necessary technical support and after-sales service to deal with problems encountered by customers during use.
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