This audio deep dive explores a real-world engineering puzzle: an MSOP integrated circuit with a cracked solder joint after 1,000 extreme thermal cycles (-40°C to 85°C). Surprisingly, the product remained functional despite the visible crack. While CTE mismatch was an initial suspect, the discussion leans towards mechanical or bending stress from PCB warpage as the most likely root cause. The conversation highlights the complex interplay of material science and electronics in failure analysis. Read more articles on our English blog: ✅What purpose of alloy metal of Cu, Ag, Zn, Sb, Bi added to solder paste? https://mpe.researchmfg.com/solder-trace-metals/ ✅Understanding the Impact of Solder Paste and Flux Composition on Electronic Board Assembly Quality https://mpe.researchmfg.com/solder-paste/ ✅What is Tg (Glass Transition Temperature) and Its Role in PCBs? https://mpe.researchmfg.com/tg-glass-transition-temperature/ ✅What is CTE (Coefficient of Thermal Expansion)? What is α2-CTE? How Does CTE Affect PCB Quality? https://mpe.researchmfg.com/cte/ ✅Introduction to the structure, characteristics and precautions of Printed Circuit Board materials https://mpe.researchmfg.com/pcb-material-composition-characteristics/ ✅What is IMC (Intermetallic Compound) in the electronic manufacturing industry? https://mpe.researchmfg.com/what-is-imc-intermetallic-compound/ ✅What is IMC (Intermetallic Compound)? How does IMC relate to PCB solder joint strength? Are there IPC standards for IMC https://mpe.researchmfg.com/soldering-strength-imc/ Watch more on YouTube: 🛠️What is IMC (Intermetallic Compounds) part I? The role of IMC plays in the soldering https://youtu.be/bPJcJpjAd9k 🛠️What is IMC (Intermetallic Compounds) part II? The different between IMC, alloy, eutectic? https://youtu.be/rAg4pS9EKn0 🛠️What is IMC (Intermetallic Compounds) part III? Explain Alloy, Eutectic in detail? https://youtu.be/I8V6PwPCXH8 🛠️What is IMC (Intermetallic Compounds) part IV? how to judge IMC healthy? https://youtu.be/J094_lytNP4 🛠️Deep Dive: Comparing SMD and NSMD Pad Designs for BGA Solder Joint Reliability https://youtu.be/agPNiwJL_eU -- Hosting provided by SoundOn