Author Archives: WorkingBear


Jul01
Why thinner PCB will need carrier for reflow process?

As the career of Manufacturing Process Engineering(MPE), WorkingBear always find there is rope wall between R&D, Marketing and Manufacturer. The R&D and Marketing always like the design be thin, sleek, and modern looking. The manufacturer always like the assembly be … Continue reading

Jun24
Case study for the mold-in insert screw boss broken

Last time WorkingBear mentioned the potential root causes to bring the screw boss crack after mold-in screw nut insert. Actually we received the complaint from the field then asked EMS and plastic supplier to double check their inventory and found … Continue reading

Jun17
Selectively increase solder paste volume solutions

Why need to partially increase the solder paste volume? This is in order to meet current smaller and thinner electric component design, the stencil thickness is made as thin as possible to accurately control the tiny solder paste which print … Continue reading

Jun10
PCB rework: Selective solder mask removal by laser

Did you ever met a trouble need to rework to remove the solder mask from the PCB?  If yes then how you did? We usually remove the solder mask manually  by knife or hand grinding tool. But these kinds of … Continue reading

Jun03
TQRDCE Performance Expectations and Review

This is an example that implement TRQDCE form for vendor survey. TQRDCE Introduction: The strategy of company for establishing and maintaining long-term working relationships is through creating and monitoring mutual performance expect ions and measurements. Performance metrics, constructive feedback, as … Continue reading