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Category Archives: SMT
Aug22
What is ENIG Surface Finished for Circuit Boards? What Are Its Advantages and Disadvantages?
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
Aug15
Causes of Poor Solderability on HASL Finished PCBs (Data Collection and Analysis)
Workingbear personally doesn’t recommend using HASL (Hot Air Solder Leveling) surface-finished PCBs in today’s SMT reflow processes, especially for double-sided reflow or fine-pitch components located on 2nd side. The defect rate of soldering with HASL is quite high and hard … Continue reading
Aug01
3D CT X-Ray Non-Destructive 3D Tomography Analysis for PCBA and BGA Failures
In recent years, the commercial application of 3D CT X-Ray has become increasingly noteworthy. As the technology matures, more companies are investing in its development, making the equipment more affordable, though still not quite at a consumer-friendly price point. Additionally, … Continue reading
Jul25
Effects of Nitrogen (N2) in SMT Reflow on Various Soldering Defects
“Oxidation” is a major enemy of solder quality, but oxidation is a natural law of elements striving for stability that cannot be avoided. Using nitrogen (N2) to isolate solder from oxygen (O2) is one of the few effective methods currently … Continue reading
Jun20
The Benefits of Using SMT Synthetic Stone or Aluminum Alloy for Reflow Carriers
With the advancement of technology, electronic products are becoming thinner and more compact. Consequently, electronic components are also getting smaller, and even the thickness of printed circuit boards (PCBs) is decreasing. The thinnest PCB Workingbear has seen is 0.4mm. Such … Continue reading
