Global Citizenship: Together for a Perfect PCB Solution
Smart Automation: Odd-form Assembly—Dedicated Insertion Equipment Matters
Nolan’s Notes: Everyone Has Their Eye on India
Detecting Process Defects
August 24, 2015 | Bob Willis, Bobwillisonline.comEstimated reading time: 2 minutes
Over the last 30 years I have seen process problems in soldering, PCB manufacture, component failures and investigating product failures worldwide. In many cases, the same process problems or failure modes just go round and round and will return if the true cause of failure is not detected.
The causes can be highly complex or very simple. The examples in this article show typical failures of boards and solder joints, the solutions for which are all online if you care to search. Some people say that when we went to lead-free, all the problems changed; actually, many remained the same and looked different, but now there are new ones to solve.
The following resources provided by National Physical Laboratory (NPL) and IPC may help you solve your process problems in the coming years. In the second part of this article, I will illustrate some process problems and their root causes. First let’s look at the Defect Database Live and then our “Defect of the Month Video” from IPC.
Defect Database Live
The National Physical Laboratory has created an Industry Defects Database that allows engineers to search through a range of defects covering components, printed circuit boards and assembly problems. The aim is to add more defects and via submissions from the industry each month. The defects database allows engineers to submit defects online with full details and solutions to current problems or requests for advice and possible solutions to the process issues or failures.
The database is unique in the industry as there is no other managed resource of its type with the added scope of having defects added via requests for defect examples from the industry.
IPC Defect of the Month
I was invited by IPC to produce a Defect of the Month video clip, to be featured on their website. Each month, we focus on a different defect type and provide photographic examples or videos showing the defects happening in real time. You can visit the IPC website or my YouTube channel to see many of the 40 clips produced showing solder balling, dendrite formation, popcorning, PCB delamination and headin- pillow failures. There are also some technical book review clips included that may be a useful reference source.
Selected Process Defects from the Industry
Now let’s look at some of the most common process issues faced in the industry and some typical examples. However, it’s worth looking at what actual industry experiences. The following three graphs show the results of short online surveys from engineers attending online webinars regarding the most common problems or process issues with PCBs and assembly.
Editor's Note: This article originally appeared in the August 2015 issue of SMT Magazine.
Share on:
Testimonial
"The I-Connect007 team is outstanding—kind, responsive, and a true marketing partner. Their design team created fresh, eye-catching ads, and their editorial support polished our content to let our brand shine. Thank you all! "
Sweeney Ng - CEE PCBSuggested Items
Koh Young, Fuji, and Kurtz ERSA Drive Smart Manufacturing Solutions for EV and Automotive Electronics at Kunshan, China Technical Seminar
09/11/2025 | Koh YoungKoh Young Technology, the global leader in True 3D measurement-based inspection solutions, partnered with Fuji Corporation and Kurtz ERSA to host an exclusive technical seminar for leading automotive manufacturers in East China. Held on September 4 at Fuji’s factory in Kunshan, the event gathered participants representing over 35 companies.
MacDermid Alpha Presents at SMTA New Delhi, Bangalore Chapter, on Flux–OSP Interaction
09/09/2025 | MacDermid Alpha Electronics SolutionsMacDermid Alpha contributes technical insights on OSP solderability at the Bangalore Chapter, SMTA reinforcing commitment to knowledge-sharing and industry collaboration.
Electra’s ElectraJet EMJ110 Inkjet Soldermask Now in Black & Blue at Sunrise Electronics
09/08/2025 | Electra Polymers LtdFollowing the successful deployment of Electra’s Green EMJ110 Inkjet Soldermask on KLA’s Orbotech Neos™ platform at Sunrise Electronics in Elk Grove Village, Illinois, production has now moved beyond green.
Absolute EMS: The Science of the Perfect Solder Joint
09/05/2025 | Absolute EMS, Inc.Absolute EMS, Inc., a six-time award-winning provider of fast turnaround, turnkey contract electronic manufacturing services (EMS), is drawing attention to the critical role of 3D Solder Paste Inspection (SPI) in ensuring the reliability of both FLEX and rigid printed circuit board assemblies (PCBAs).
Indium Corporation to Highlight High-Reliability Solder Solutions at SMTA Guadalajara Expo
09/04/2025 | Indium CorporationIndium Corporation, a leading materials refiner, smelter, manufacturer, and supplier to the global electronics, semiconductor, thin-film, and thermal management markets, will feature a range of innovative, high-reliability solder products for printed circuit board assembly (PCBA) at the SMTA Guadalajara Expo and Tech Forum, to be held September 17-18 in Guadalajara, Mexico.