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Category Archives: Process
May13
MRB Decision-Making and Cosmetic Quality Evaluation for Plastic Parts
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
Apr27
Using Limit Golden Samples to Manage Non-Quantifiable Quality Standards
In business transactions, both buyers and sellers usually agree on a product specification and acceptance criteria for the items being purchased. These criteria may include things like full functionality, dimensions within tolerance, intact packaging, and no defects in color or … Continue reading
Apr22
How to Define Cosmetic Quality Standards for Plastic Parts
Caption: Cosmetic scratches on plastic parts Before products are put into inventory after final assembly, electronics manufacturing factories always perform quality inspections to ensure product quality. In terms of functional performance, most products go through 100% function testing, so pass/fail … Continue reading
Apr02
Root Cause Analysis: Why FPC Traces Break
Recently, my company started seeing an increase in field returns caused by open circuits in flexible printed circuits (FPCs) inside the terminal. After digging into several cases, the root cause turned out to be broken copper traces. So what’s going … Continue reading
Mar26
How to Design FPC-to-PCB Connections for Better Assembly (DFx)
As electronic devices keep getting thinner and more compact, FPCs (flexible printed circuits) are used more and more. In some designs, FPCs even replace traditional PCBs. But no matter how advanced FPC technology becomes, it still needs to connect to … Continue reading
