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Category Archives: Soldering
May22
What is CAF (Conductive Anodic Filament) in PCBs? and How to Prevent It
One of our company’s products once experienced an issue called an “internal micro-short” in the printed circuit board (PCB). After investigation, we discovered the root cause was something called CAF (Conductive Anodic Filament). But let’s be honest—if you translate that … Continue reading
Mar27
Does PCB Solder Mask Misalignment Lead to BGA Soldering Defects?
Recently, our company started a new project, and the R&D team has been pushing PCB layout requirements to the extreme. As PCBs size get smaller, the solder mask (S/M) design must also shrink accordingly. However, our current PCB manufacturers struggle … Continue reading
Feb27
What Is Solder Mask (S/M)? What Is Its Purpose on a PCB? Why Is It Usually Green?
In discussions about printed circuit boards (PCBs), you’ll often hear the term Solder Mask (S/M). But what exactly is a solder mask, and what role does it play in a PCB? Some also refer to it as solder resist. What … Continue reading
Feb06
Causes of Solder Empty and Tombstoning in Small Chip of Resistors and Capacitors
Recently, some people have asked about issues with solder empty in small chip SMD components like resistors and capacitors. Even after thoroughly checking the reflow oven profile settings and confirming everything is correct, solder empty still frequently occur with these … Continue reading
Jan24
Top ENIG PCB Issues: Black Pad and Phosphorus-Rich Layers Explained with Prevention Tips
With the rapid adoption of smartphones, the trend toward miniaturized electronic products, and the EU’s requirements for lead-free manufacturing, Electroless Nickel Immersion Gold (ENIG) surface treatment PCB has become a popular choice for many electronic products. This is largely due … Continue reading
