How simple is a 28nm car chip to produce than a 5nm mobile phone chip? Recently, some professionals said that in fact, don't look at the 28nm car chip, it seems to be a lot behind the process, but in fact, it is even more difficult than the 5nm mobile phone chip.
Why is this? The reason is that the mobile phone chip and the car chip have different requirements for the process yield and stability, and the requirements are much stricter than the 5nm mobile phone chip.
The general automotive chip requires the working temperature to be -40 degrees to 175 degrees, and the service life requirement is more than 20 years, and in manufacturing, the defective rate should be controlled within one part per million.
Because the working environment of the car is very harsh, and the safety performance is above all, there can be no mistake, which is a big challenge for the production and design of chips.
In contrast, the general consumer-grade chips (including mobile phone chips), the working temperature is generally 0-125 degrees, the life is generally 10 years, and the defective rate is less than 2 parts per 10,000.
After all, if the chip of a mobile phone fails, it can not be used at most, and it is replaced, but once the chip of a car fails, it may be a matter of \"car crash\".
So even if the current global automotive chip shortage, the production capacity of automotive chips has not been rapidly increased is this.
Do not underestimate the 28nm or 40nm car chip, the surface is backward technology, but the requirements are not simple, there is no strength and technology, and do not dare to increase production capacity, so as to avoid big problems.