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Author Archives: WorkingBear
Sep25
Why BGA soldering ball always crack(1)? Stress > bonding-force
What is the actual root cause of BGA solder ball cracking? Stress is higher than its bonding-forces. The root cause of BGA solder ball cracked is stress higher than bonding-forces. Stress is higher than bonding-force is the certain result of … Continue reading
Dec19
What is IMC (Intermetallic Compound) in the electronic manufacturing industry？
What is the IMC, the Intermetallic Compound? We always heard the manufacturing engineer or some of Mechanical Engineer talking about this keyword when discussing soldering quality or electronic component drop issue. So, what is the role of IMC layer in … Continue reading
Dec05
Both solder joint bridging and open solder joint happen at same BGA?
Is that possible for both solder joint bridging and open solder joint defect occur in the same BGA (Ball Grid Array) or CSP (Chip Scale Package) device? It is rare to observe both solder joint bridging and open solder joint … Continue reading
Nov14
How to print solder paste on PC Board and screen printing notices?
Printing the solder paste on the PCB (Printed Circuit Board) and go through reflow oven to re-melt the solder paste and solder the electronic components on PCB is most common process in today’s electronics manufacturing industry. Printing the solder paste … Continue reading
Jun19
Increase solder paste volume will improve the MLCC capacitor broken?
Recently WorkingBear got complaint from R&D and ask increase the solder paste volume on the MLCC (Multi-Layer Ceramic Capacitor) component pads to improve the capacitor broken issue. R&D said he had verified that the capacitor’s footprint in the board design … Continue reading
