Author Archives: WorkingBear


Sep19
Does the Gold Thickness in ENIG PCBs Affect Component Detachment?

post on September 19, 2024

Does the Gold Thickness in ENIG PCBs Affect Component Detachment? Do you know how the thickness of the gold layer in ENIG surface-finished PCBs impacts soldering quality? What role does the gold layer play in PCBA soldering? How could the … Continue reading →

EDX/EDS/SEM/IMC/FTIR, PCB/FPC/PTF, Quality, Reliability, SMT, Soldering     WorkingBear    Views (2,812)     comment (0)
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Sep12
What Are Hard Gold, Soft Gold, Plated Gold, ENIG, and Flash Gold in PCBs?

post on September 12, 2024

In the electronics industry, “gold” is often used on the surface of products. But do you know what hard gold, soft gold, electroplated gold, ENIG (Electroless Nickel Immersion Gold), and flash gold are in printed circuit boards? What are the … Continue reading →

PCB/FPC/PTF     WorkingBear    Views (10,432)     comment (0)
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Sep05
Using 2D X-Ray to Diagnose BGA Solder Void Issues

post on September 5, 2024

This is an X-ray inspection image of an MCU’s BGA soldering that failed after reflow. The owner mentioned that the BGA package was not functioning, but when pressing on the MCU, it would temporarily work again. Since Workingbear didn’t have … Continue reading →

Quality, SMT, Soldering, Test/Inspection     WorkingBear    Views (6,040)     comment (0)
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Aug29
How to Use 2D X-Ray to Identify BGA Issues like Non-Wetting, Cold Solder, and HIP or NWO

post on August 29, 2024

If you’re an SMT engineer, you’ve probably used an X-Ray inspection machine to check the soldering quality of BGAs. But, after looking at the BGA solder balls repeatedly, they all seem to look the same. So, how can you tell … Continue reading →

Quality, SMT, Soldering, Test/Inspection     WorkingBear    Views (7,537)     comment (0)
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Aug22
What is ENIG Surface Finished for Circuit Boards? What Are Its Advantages and Disadvantages?

post on August 22, 2024

ENIG (Electroless Nickel Immersion Gold), also known as immersion gold (Au), chemical Ni/Au, or soft gold, is a type of surface finished for printed circuit boards (PCBs). It is widely used in the assembly of mobile phone circuit boards and … Continue reading →

PCB/FPC/PTF, Process, Quality, SMT, Soldering     WorkingBear    Views (6,619)     comment (0)
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