What are the reasons for the failure of solder joints in Automotive PCB assembly
With the development of electronic products to miniaturization and precision, the PCBA processing and assembly density adopted by the chip processing plant is getting higher and higher, and the solder joints in the circuit board are getting smaller and smaller, and the mechanics and electricity it carries And the thermodynamic load is getting heavier and heavier, and the requirements for stability are increasing. However, PCBA solder joint failure may also be encountered in the actual processing process, and it is necessary to analyze and find the reason to avoid solder joint failure again.
Reasons for the failure of solder joints in Automotive PCB assembly:
1. Bad component leads: plating, pollution, oxidation, coplanarity.
2. Bad PCB pads: plating, pollution, oxidation, warpage.
3. Solder quality defects: composition, impurity, and oxidation are not up to standard.
4. Flux quality defects: low solderability, high corrosion, low SIR.
5. Defects in process parameter control: design, control, and equipment.
6. Defects of other auxiliary materials: adhesives, cleaning agents.
How to increase the stability of PCBA solder joints:
For the stability experiment of PCBA solder joints, including stability experiment and analysis, its purpose is to evaluate and appraise the stability level of PCBA integrated circuit devices on the one hand, and to provide parameters for the stability design of the whole machine.
On the other hand, it is necessary to increase the stability of the solder joints during PCBA processing. This requires the analysis of failed products to find out the failure modes and analyze the causes of failure. The purpose is to correct and improve the design process, structural parameters, welding process and increase the yield of PCBA processing. The failure mode of PCBA solder joints has an impact on the cycle life. The prediction of is very important and is the basis for establishing its mathematical model.
Other news about S&L
- What is the differnece between the Rigid Flex PCB and A Flexible Circuit
- High Volume Health care PCB Assembly Benefits
- Tells you What is a High Frequency PCB
- FPC supplier:What Is The Difference Between Flexible PCB Coverlay And Solder Mask Layer
- Flexible PCB manufacturer:What is Flexible PCB Used For?
- PCB factory china:How are Layers Connected in Multilayer PCB
- PCB supplier china:How are Aluminum PCBs made?
- PCB manufacturer China:What is Via Hole in PCB
- What Are the Types of Rigid Flexible PCB?
- Health care PCB factory:What are the UPS PCB Components
Your browsing history
- Metal core PCB Base Performance
- ZTE
- Flex rigid PCB tells you What are the requirements for PCBA transport packaging
- PCB factory china:What is Water-Soluble Solder Paste?
- PCB supplier china, Can you imagine Lao Gan Ma adds to fashion?
- FOSTER
- Advantages of Immersion Silver Surface Finish for Flex rigid PCB
- FPC manufacturer:What Is TG PCB Board?
- What are the different types of Automotive PCB Stencils
- High frequency PCB:How to Break the Bottleneck of New Energy Vehicle Market
A total of -comments【I want to comment】