Automotive electronic products have different reliability requirements for PCBs in different parts, Huihe Circuit passed the IATF16949 automotive quality management system standard, Strictly follow the requirements of the control plan to produce, monitor, record and analyze, Ensure the stability of process parameters and the traceability of the production process.
Applicable Products
High precision multilayer circuit board
Minimum line width and line spacing 3/3mil
BGA 0.4pitch, the smallest hole is 0.1mm
Used in industrial control, consumer electronics
Blind and buried via circuit board
Use micro blind holes to increase the line distribution density
Improve radio frequency and electromagnetic wave interference, heat conduction
Used in servers, mobile phones, digital cameras
RF microwave high frequency board
Low dielectric constant Dk, high transmission rate
Low dissipation factor Df, low dielectric loss
Applied in 5G, rail transit, Internet of Things
Classification of automotive circuit boards
Car body electronic control system
On-board electronic control system
Engine control system
Ignition control system
Fuel control system
Air supply system
Body control system
Power management system
Safety management system
Lighting system
Display monitoring system
Chassis control system
ABS control system
Electronic stability system
Pressure monitoring system
Steering control system
Car TV
Driving recorder
Parking sensor system
Car navigation system
Car camera system
Automobile electrification and intelligence will be the core driving force
The requirements of millimeter wave radar for PCB substrate are as follows:
Millimeter-wave radar includes two core hardware: MMIC circuit and radar antenna high-frequency PCB board. There are high requirements in the choice of substrate and PCB processing. The base material needs to use high-frequency materials. The production of high-frequency PCB boards has higher requirements for the manufacturer’s process control capabilities, such as copper thickness and line width tolerance. The price of PCB for millimeter wave radar is generally 1.5-3 times that of ordinary PCB.
High-frequency substrate corresponding to 24GHz system
factory
Product brand
Resin composition type
Dk (below 10GHz)
Df (below 10GHz)
Dk thermal change rate ppm/℃
Rogers
RO4835
Hydrocarbon
3.48±0.05
0.0037
+50 (-50~150℃)
Taconic
TLF-35A
PTFE
3.5
0.0016
__
Shengyi Technology
S7136H
Hydrocarbon
3.42±0.05
0.003
__
Corresponding to 77GHz (or 79GHz) system high frequency substrate
factory
Product brand
Resin composition type
Dk (below 10GHz)
Df (below 10GHz)
Dk thermal change rate ppm/℃
Rogers
RO3003
PTFE+ceramic (no glass fiber)
3±0.04
0.001
-3 (-50~150℃)
Taconic
TSM-DS3
PTFE
(Tk) 5.4 (-30~120℃)
0.0011
(Tk) 5.4 (-30~120℃)
Taconic
TAL-28
PTFE+Nano filler
2.8
0.0012
(Tk) 2.24(-30~120℃)
Shengyi Technology
GF77G
PTFE
2.28±0.04
0.0012
__
New energy vehicle PCB consumption and value
The amount and value of PCBs for new energy vehicles have increased significantly. At this stage, the demand for PCBs in traditional cars is relatively small, and the value of PCBs is relatively low. The main reason is that the power system requires the most PCBs, accounting for 32%. In comparison, the average PCB consumption per car for traditional cars is about 1 square meter, and the value is about 60 US dollars. The PCB consumption of high-end models is 2-3 square meters, the value is about 120-130 US dollars, and the PCB consumption of new energy vehicles is close to 8 square meters. , The value of a bicycle is as high as $400.
4 major systems and subsystems of automotive electronics
system
Subsystem
PCB ratio
Power control system
Ignition control system, fuel injection control system, engine idle control system, exhaust gas recirculation system, anti-lock brake control system
50%
Safety control system
Automatic transmission control system, suspension electronic system, power steering electronic control system, cruise control system
22%
Body Electronic System
Automatic air conditioning system, electronic instrument system, airbag system, automotive electronic anti-theft system, head-up display system
25%
Entertainment communication system
Electronic instrument system, car audio system, car navigation system, electronic map system
25%3
PCB common loads and failure modes
PCB is a key component of these electronic systems, and special attention must be paid to PCB failure modes that may cause short circuits or open circuits. Reliability is the core requirement of automotive PCB. In an unmanned car powered by several hundred volts, the PCB failure mode must be thoroughly understood to ensure reliable operation.
Possible failure modes
2. Cracks in the outer copper layer
3. Micro via hole crack
4. Cracks in the prepreg
5. Electrochemical migration of PCB surface
6. Cracks in solder mask
PCB environmental load
2. bend
3. Vibration
4. Humidity
5. Combination of several loads
PCB assembly load
2. Selective soldering
3. Compression technology
Huihe Circuits knows that the reliability of automotive electronics is equivalent to the reliability of automobiles, so it is necessary to ensure that the reliability of automotive electronics meets the requirements of service life and environmental tolerance:
- PCBs used in automotive electronic systems need to withstand a variety of environmental changes, such as temperature and humidity, climate, acid mist, vibration, electromagnetic interference, current impact, etc.;
- In order to ensure the normal life cycle, the PCB needs to meet the characteristics and requirements of high reliability, high integration, high heat dissipation, high current (thick copper), light weight and miniaturization, and embedded devices. For example, the high-voltage control system of a new energy electric vehicle uses a high-current board to integrate the original scattered high-voltage components, scattered DC/charge/discharge/MCU and other functional parts on a PCB. The density has doubled several times, but Save 30% in structural space.
Huihe Circuits takes the following measures to ensure that PCBs for automotive electronics improve reliability:
- Pass IATF16949 automotive quality management system standards;
- Choose appropriate materials and production processes, reliability testing and testing;
- When planning the project, select appropriate materials according to the parts of the automotive electronic products;
- Strictly follow the requirements of the control plan to produce, monitor and record;
- Use SPC to monitor and analyze key processes and key characteristics;
- Ensure the stability of process parameters and the traceability of the production process;
- Based on the IPC-TM-650 standard, a set of systematic and strict product performance testing methods and evaluation mechanisms have been established, including thermal cycling test, high temperature thermal shock, salt spray test, high current shock, high voltage resistance, electromigration, etc.
Why choose Huihe Circuit?
Huihe Circuit has a production workshop of 12,000 square meters, with more than 20 senior engineers now and a monthly production capacity of 35,000 square meters. It is a professional manufacturer of PCB circuit boards. Huihe Circuits has obtained UL, ISO9001, IATF16949, ISO14001, ISO13485, OHSAS18001, RoHS, CQC and other management system and product certifications, and conforms to IPC international inspection standards.
Huihe Circuits has been constantly striving to improve the quality of PCB circuit boards to be close to flawless. Huihe Circuits not only has a strict and complete quality control system, but also has sophisticated production and testing equipment. Huihe Circuit’s professional and thoughtful service capabilities and complete quality control system have won Huihe Circuit a good reputation among customers.
ISO14001, ISO13485, OHSAS18001, RoHS, CQC and other management system and product certifications, and conforms to IPC international inspection standards.
High-quality imported raw materials to ensure product quality from the source
