A smart car is more like a smart terminal than a car. It gives the car the attributes of an electronic product, both electronic and mechanical attributes, and will gradually surpass the latter, leading the product definition and user experience of the car. It is precisely because of this that smart cars and traditional cars have parted ways in terms of architecture.
Smart cars as "electronic products" pay more attention to data collection, processing and communication
Different from traditional cars, smart cars are no longer just the mechanical components that determine the difference between products, but electronic components such as sensors, chips, and CAN buses. In fact, many users pay more attention to electronic components than to the machinery itself. It is precisely because of this that more and more manufacturers need such a product that can not only improve the overall quality of electronic components, but also fit the future development direction of "integration", "miniaturization" and "intelligence". ----Ceramic substrate came into being.
Why choose ceramic substrate?
In terms of improving the overall quality of electronic components, ceramic substrates have many advantages that traditional substrates cannot match, which are mainly reflected in the following points:
1. Higher thermal conductivity
The thermal conductivity of traditional MCPCB is 1～2w/mk, and the thermal conductivity of copper itself is 383.8w/mk, but the thermal conductivity of the insulating layer is only about 1.0w/mk, and better can reach 1.8w/mk, because of insulation Because of the layer, the thermal conductivity of the copper substrate can only reach about 2w/mk. Compared with traditional materials, the thermal conductivity of the alumina ceramic substrate is 15 to 35 w/mk, and the thermal conductivity of the aluminum nitride ceramic substrate is 170 to 230 w/mk. The ceramic substrate uses a ceramic sheet as the substrate without an insulating layer. The heat on the copper circuit is directly conducted to the ceramic sheet and dissipated, which completely preserves the thermal conductivity of the ceramic sheet.
2. Corrosion resistance
The internal parts of the car body are in a very harsh environment when the car is running, and they are often exposed to high temperature and strong corrosion. According to reports, metal corrosion causes an average annual loss of US$150 to US$250 per car in the world. Car recalls caused by corrosion of auto parts are not rare. The ceramic circuit board uses inorganic non-conducting ceramic as the base material, and then the metal directly contacts the ceramic. It has strong corrosion resistance and will not damage the sensor like metal-based materials.
3. more matching thermal expansion coefficient
The material of the sensor chip is generally silicon, and the thermal expansion coefficient of ceramics and the chip are close, and it will not cause too much deformation when the temperature difference changes drastically to cause problems such as wire unsoldering and internal stress. This is impossible for general metal material substrates.
4. high-end customized services
Stoneon can provide customized services according to customer needs, and mass-produce according to the product design drawings and requirements given by users. Users can have more choices and be more humane.
From machinery to electronics, the iteration of automotive products is no longer just competition at the mechanical level such as engines and transmissions. In the future, the decisive point for automakers in the competition will be autonomous driving, digital cockpit, and the upgrade of the three-electric technology, and the iteration speed will become faster and faster.
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