Category Archives: Quality


Jan02
SMT Reflow Soldering Temperature Profiles Explanation and Precautions

The thriving development of the electronics industry owes much to the invention and improvement of Surface Mount Technology (SMT). Among the various SMT techniques, Reflow Soldering plays a pivotal role. In this discussion, we aim to shed light on some … Continue reading

Jul27
The Myth of PCB Baking: Can Pre-Baking PCBs Improve Solderability?

WorkingBear has noticed that many engineers or managers involved in Surface Mount Technology (SMT) have a strong passion for “PCB baking,” but their understanding of the concept might not be very clear. If you browse through discussions on PCB and … Continue reading

Jul11
Preventing Solder Cracks in BGA Designs: Strengthening Tips from the Design End

Lately, many colleagues have been asking WorkingBear for advice on designing BGA (Ball Grid Array) packages to prevent solder joint cracking and improve overall durability. This sudden interest came after a senior manager raised concerns during a new product development … Continue reading

Jun13
How to Determine Whether Underfill is Needed for BGA?

A question from a netizen, “In the past, many mobile phone PCB assemblies would use Underfill depositing under the BGA package to enhance the mechanical strength of the solder joints. However, it has been found that most mobile phone assemblies … Continue reading

Jun06
Questions from Newcomer: Why is Solder Paste Needed for SMT Reflow since BGA Already has Solder Balls? Is Solder Paste Needed for BGA Repair?

Questions from a newcomer about electronic manufacturing assembly process: Since there are already solder balls locate on the BGA substrate, why is it necessary to apply solder paste on the PCB pads during SMT reflow? Is it necessary to apply … Continue reading