What is the vehicle regulation level? Vehicle specification level semiconductor / component certification

Date：2022-01-21 15:41:46Views：2333

Because of the attack of automobile electrification, intelligence and networking, the global shortage of automobile chips and the rise of domestic automobile chip industry. The automotive chip industry has received unprecedented attention. The price of automotive electronic products is generally expensive. One of the main reasons is the use of vehicle specification electronic components, but what kind of electronic components are vehicle specification devices?

Aec-q series standards are industry recognized certification standards for vehicle components. Here, AEC (Automotive Electronics Council) refers to the automotive electronics Committee, which is an organization established by GM, Ford and Chrysler to establish a set of general parts qualification and quality system standards. Q is the initial letter of qualification.

AEC members include OEMs, parts manufacturers tire1 and component manufacturers, which means that the chip certified by aec-q is a product recognized by the whole automobile supply chain. According to different types of certified components, aec-q can be divided into aec-q 100, aec-q 101, aec-q 102, aec-q 103, aec-q 104 and aec-q 200. Aec-q 100 is for integrated circuits, aec-q 101 is for separated semiconductor devices including diodes / triodes and FETs, aec-q 102 is for separated optoelectronic devices, aec-q 103 is for MEMS sensors, aec-q 104 is for multi chip assembly and MCM modules, and aec-q 200 is for passive devices such as capacitors, inductors and resistors.

Iaft16949 is the threshold of automotive chip vehicle specification Level certification and the standard specification of automotive quality management system; Aec-q series is mainly aimed at the reliability evaluation of electronic components of vehicle specifications; ISO 26262 is an evaluation specification for the functional safety of electronic and electrical systems.

Aec-q reliability verification section is divided into four steps: design and manufacture of test board and socket for HTOL / hast / PTC and other tests in the early stage of test; Before the device is sent for test, the appearance and function shall be checked and confirmed, and the pretreatment shall be carried out according to the MSL level of the device; Stress verification tests such as environment, life, packaging and ESD; After the reliability test, the functional appearance inspection shall be carried out, and finally the data shall be sorted out and a report shall be issued.

What is the difference between the application of electronic components in cars and general consumer electronics?

Environmental requirements

Temperature: the working temperature requirements of automotive electronic components are relatively wide. There are different requirements according to different installation positions, but they are generally higher than those of civil products (it is said that AEC Q100 has deleted the temperature requirement of 0 ℃ - 70 ℃ in version h, because no automotive product has such low requirements).

give an example:

Engine periphery: - 40 ℃ - 150 ℃;

Passenger compartment: - 40 ℃ - 85 ℃;

Civil products: 0 ℃ - 70 ℃.

Other environmental requirements such as humidity, mildew, dust, water, EMC and harmful gas erosion are often higher than those of consumer electronics.

Vibration, impact

When a car works in a moving environment, it will encounter more vibration and impact for many related products. This requirement may be much higher than the products placed at home.

reliability

In order to explain the reliability requirements of the vehicle, another way is to explain:

1. Design life: the general automobile design life is about 200000 km in 15 years, which is far greater than the life requirements of consumer electronics products.

2. Under the same reliability requirements, the more components and links the system consists of, the higher the reliability requirements of the components. At present, the electronic level of the car is very high. From the powertrain to the braking system, a large number of electronic devices are equipped, and each device is composed of many electronic components. If we simply regard them as a series relationship, to ensure that the whole vehicle achieves considerable reliability, the requirements for each part of the system are very high, which is why the requirements for auto parts are often described in ppm (parts per million).

Conformance requirements

Now the car has entered a stage of mass production. A car can produce hundreds of thousands of cars a year, so the consistency of product quality is very high. This was a challenge for semiconductor materials in the early years.

After all, the consistency of diffusion and other processes in the production of semiconductors is difficult to control. The performance of products produced is easy to be discrete. In the early stage, it can only be completed by aging and screening. Now, with the continuous improvement of processes, the consistency has been greatly improved. The consistency of quality is also the biggest difference between many local suppliers and international well-known suppliers. For complex automotive products, it is certainly unacceptable that components with poor consistency lead to potential safety hazards in the whole vehicle.