May08
The Deep Dive: BGA Pads: SMD vs. NSMD (Strength, Voids & Design Considerations)

The deep dive BGA pads SMD vs NSMD

Hey folks, welcome back to the blog! Today, we’re diving deep into something absolutely critical for the reliability of almost every electronic gadget out there: BGA solder joints. You know, those tiny connections that hold complex chips onto our printed circuit boards (PCBs). Keeping them strong and free from defects like those pesky little bubbles inside the solder – we call them voids – often comes down to a surprisingly fundamental aspect: the design of the pads on the PCB.

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Apr30
Understanding the EDX Report: Can EDX Be Used to Estimate a Sample’s Chemical Formula?

How To Identify IMC Like like Cu₆Sn₅, Cu₃Sn, or Ni₃Sn

Workingbear has noticed that many people still have questions about EDX/EDS elemental analysis reports. This is the second article where he tries to provide answers based on his knowledge.

EDX (Energy-Dispersive X-ray Spectroscopy), also known as EDS, is actually an auxiliary function used in SEM (Scanning Electron Microscopy), TEM (Transmission Electron Microscopy), and STEM (Scanning Transmission Electron Microscopy) analysis techniques.

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Apr23
Understanding the EDX Report: Why Does the Same Element Have Multiple Peaks?

In failure analysis reports for PCB assembly defects, we often use EDX or call EDS (Energy-Dispersive X-ray spectroscopy) for chemical elemental analysis. However, many people don’t fully understand how EDX works, and they have only a vague idea of how to interpret an EDS elemental analysis report. In most cases, after running an EDX scan and obtaining an elemental analysis, they get stuck—unsure of what to do next. The real question is: What useful information can EDX actually provide?

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Apr17
How to Identify Unknown Contaminants: Choosing Between EDX/EDS and FTIR

When we discover unknown contaminants on printed circuit boards assembly (PCBA) or electronic products, how do we determine what they are and where they come from? Do we rely on experience, or do we use scientific instruments for analysis? What methods are commonly used in the industry to detect and analyze contaminants?

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Apr10
What is PCB (Printed Circuit Board)? What Are Rigid, Flexible, and Rigid-Flex PCBs?

In the electronic devices we use daily—such as remote controls, smartphones, refrigerators, TVs, air conditioners, and computers—there is a crucial component called the Printed Circuit Board (PCB). The name comes from the way its electrical circuits are formed, similar to early book printing. Some also refer to it as a Printed Wire Board (PWB).

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