Car Circuit Board Assembly

Product Details

Module:

Basic requirements for performance of Car circuit board Assembly

a. High reliability

Automotive reliability mainly comes from two aspects: longevity and environmental resistance. The former refers to the fact that normal operation can be guaranteed over its service life, while the latter refers to the fact that the function of the PCB remains the same when the environment changes.

b. Light weight and small size

Lightweight, tiny cars are good for energy savings. Lightness comes from reducing the weight of each ingredient. For example, some metal parts are replaced by engineering plastic parts. Additionally, both automotive electronics and PCBs should be miniaturized. For example, the volume of the ECU (Electronic Control Unit) in automotive applications is about 1200 cm3 starting in 2000, while less than 300 cm3, falling through four times. In addition, the starting point firearms have been transformed from mechanical firearms connected by wires to electronic firearms connected by flexible wires with a PCB inside, reducing the volume and weight by more than 10 times.

The lightweighting and miniaturization of PCBs originate from the increase in density, reduction in area, reduction in thickness and multi-layering.

Manufacturing Characteristics of Car circuit board Assembly

(1)High frequency substrate

Automotive collision avoidance/predictive braking safety systems function as military radar equipment. Since automotive PCBs are responsible for transmitting microwave high-frequency signals, a substrate with low dielectric loss needs to be used together with the common substrate material PTFE. Unlike FR4 materials, PTFE or similar high frequency matrix materials require special drilling speeds and feed rates during the drilling process.

(2)Thick copper PCB

Due to high density and high power and hybrid power, automotive electronics bring more thermal energy, and electric vehicles tend to require more advanced power transmission systems and more electronic functions, which puts forward higher requirements for heat dissipation and high current. Require.

Making a thick copper double layer PCB is relatively easy, while making a thick copper multilayer PCB is much more difficult. The key is thick copper image etching and thick vacancy filling.

The internal paths of the thick copper multilayer PCB are all thick copper, so the pattern transfer photodry film is also relatively thick, which requires extremely high etching resistance. The pattern etching time of thick copper will be long, and the etching equipment and technical conditions are in the best condition to ensure the complete routing of thick copper. When performing external thick copper wiring fabrication, the combination between laminating a relatively thick copper foil and patterning a thick copper layer can be performed first, followed by film void etching. The dry film resist of pattern plating is also relatively thick.

The surface difference between the inner conductor of the thick copper multilayer PCB and the insulating substrate material is large, and the ordinary multilayer board lamination cannot completely fill the resin, resulting in a cavity. To solve this problem, thin prepregs with high resin content should be used as much as possible. The copper thickness of the internal routing on some multilayer PCBs is not uniform, and different prepregs can be used in areas with large or small differences in copper thickness.

(3)Component embedding

To increase assembly density and reduce component size, PCBs with embedded components are widely used in mobile phones, which are also required for other electronic devices. Therefore, component embedded PCBs are also used in automotive electronics.

Our service

1. PCB Assembly on SMT and DIP

2. PCB schematic/layout/production

3.PCBA clone/change board

4. Parts procurement and procurement

5. Shell design and injection molding

6. A full range of testing services. Including: AOI, functional test, in-circuit test, X-Ray For BGA test, 3D solder paste thickness test

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