Category Archives: Process


Sep16
Component Drop-Off on PCBs: How to Analyze, Troubleshoot, and Identify the Root Cause

post on September 16, 2026

Figcaption: Component Drop-Off on PCBs: How to Analyze, Troubleshoot, and Identify the Root Cause Components falling off a PCB can be a nightmare for many process and quality engineers. Workingbear has previously shared several cases involving components falling off PCBs. … Continue reading →

Design, EDX/EDS/SEM/IMC/FTIR, PCB/FPC/PTF, Process, Quality, Reliability, Soldering     WorkingBear    Views (295)     comment (0)
,

Aug19
BGA Solder Ball Crack Analysis: How to Identify the Root Cause Using the Red Dye Penetration Test

post on August 19, 2026

Figcaption: How to Identify the True Root Cause of BGA Solder Ball Cracking Using the Red Dye  Penetration Test When a BGA fails and the Red Dye Penetration Test reveals cracked solder balls, how can we determine the actual root … Continue reading →

Process, Quality, SMT, Soldering     WorkingBear    Views (429)     comment (0)
, , ,

Aug12
BGA Solder Ball Crack Analysis Using the Red Dye Test | Types and Failure Patterns

post on August 12, 2026

Figure: Use the Red Dye Test to Identify BGA Solder Ball Cracks: Failure Patterns and Practical Analysis BGA IC functional failures are a major headache for many electronics companies. This is especially true today, as most CPUs use BGA packages. … Continue reading →

Process, Quality, SMT, Soldering     WorkingBear    Views (711)     comment (0)
, ,

Jul08
BGA Cross-Section Analysis: How to Evaluate Solder Joint Quality and Identify Common Defects

post on July 8, 2026

Figcaption：BGA Cross-Section Analysis: How to Evaluate Solder Joint Quality and Identify Common Defects This article is intended for anyone who isn’t yet familiar with how to evaluate the quality of BGA solder joints from cross-section images. Workingbear happens to have … Continue reading →

Process, Quality, SMT, Soldering     WorkingBear    Views (1,317)     comment (0)
, , ,

May13
MRB Decision-Making and Cosmetic Quality Evaluation for Plastic Parts

post on May 13, 2026

When Workingbear first joined an electronics final assembly factory as a product/process engineer, I often had to attend MRB (Material Review Board) meetings. From time to time, people would come to me asking me to evaluate rejected parts and decide … Continue reading →

Management, Manufacture, Plastic, Process, Quality     WorkingBear    Views (1,057)     comment (0)