Category Archives: EDX/EDS/SEM/IMC/FTIR


Jul10
Customer Complaint About Oil Contamination on PCB: Who’s the Real Culprit? (FTIR Analysis)

post on July 10, 2025

In the previous article, Workingbear mentioned a serious DOA (Dead on Arrival) customer complaint involving one of the company’s products. Most of the defective units had unresponsive keypads—specifically the 3, 6, and 9 buttons—and it was eventually traced back to … Continue reading →

Case study, EDX/EDS/SEM/IMC/FTIR, Keypad, Process, Quality     WorkingBear    Views (401)     comments (1)
, ,

Jul03
[Case Study] Troubleshooting a Customer Complaint – Keypad Malfunction Caused by Oil & Powder Contamination on the PCB

post on July 3, 2025

This article shares a real case from Workingbear’s past experience dealing with an urgent customer complaint. One day, Workingbear was suddenly assigned to fly to a factory in China to “hunt for oil.” My manager even warned, “If you don’t … Continue reading →

Case study, EDX/EDS/SEM/IMC/FTIR, Keypad, Process, Quality     WorkingBear    Views (718)     comment (0)
, ,

Jun19
What Is EDX/EDS? A Beginner’s Guide to Elemental Analysis in Materials Science

post on June 19, 2025

Energy-Dispersive X-ray Spectroscopy (EDS or EDX) is a common, non-destructive technique used in the industry to quickly identify the elemental composition of a sample’s surface. In electronics manufacturing and material analysis, knowing what elements are present is critical for quality … Continue reading →

EDX/EDS/SEM/IMC/FTIR, Quality     WorkingBear    Views (1,764)     comment (0)

May29
Uncovering the Culprit: How CAF Turned Out to Be the Hidden Cause Behind PCB Micro-Shorts — From Suspicion and Analysis to Solutions

post on May 29, 2025

Workingbear’s company was having a tough time with a strange issue: intermittent micro-short circuits inside the layers of the PCB. Since the shorts didn’t show up near any components, it was really hard to figure out what was wrong. Recently, … Continue reading →

Case study, EDX/EDS/SEM/IMC/FTIR, PCB/FPC/PTF, Process, Quality, Reliability     WorkingBear    Views (1,147)     comment (0)
, ,

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

post on April 30, 2025

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 … Continue reading →

EDX/EDS/SEM/IMC/FTIR     WorkingBear    Views (1,063)     comment (0)