Seeger and Hosband is a small electronics contract manufacturer offering SMT and through hole circuit card assembly as well as cable harnesses, chassis assembly, and specialized items like transducers and thermister probe assemblies.
Industry Directory | Manufacturer
Manufacturer of Real-time Automated Xray Inspection. Focus on SMT solder joint inspection of hidden joints ie, BGAs and PTH Barrel Fill per IPC-610. Clients include leading manufacturers in the electronics/automotive Industries.
New Equipment | Education/Training
IPC A-600H Acceptability of Electronic Assemblies. The IPC-A-600, "Acceptability of Printed Boards " is the most widely used published specification on printed wiring boards. This specification has set the standard for rigid printed boards in terms o
New Equipment | Education/Training
Now updated to Revision F of the latest IPC-A-610F and J-STD-001F – the IPC Training & Reference Guide illustrates critical acceptance criteria for the evaluation of through-hole solder connections. With 30 pages and a compact size at 5.5 x 8.5 inch
Electronics Forum | Mon Jan 24 22:28:57 EST 2005 | davef
In addition to the potential problems you mentioned, add: * Barrel cracking of PTH and via. * Lifted pads. * Warped boards. And the reason you're not using a solder fountain to to solder this connector is? Or use an old trick we've done here on SMT
Electronics Forum | Tue Feb 24 09:52:14 EST 2004 | davef
First, two points about hole / barrel fill are: * A filled hole is an excellent indicator of the optimum process and optimum quality PCB. * The study that showed that holes need not be filled was paid for by the US Army and performed by Lockheed in
Industry News | 2010-09-30 00:35:51.0
The new E revisions of IPC’s popular desk reference manuals, IPC-DRM-PTH, Through-Hole Solder Joint Evaluation Training & Reference Guide and IPC-DRM-SMT, Surface Mount Solder Joint Evaluation Training & Reference Guide have been released.
Industry News | 2018-12-08 03:29:29.0
SMT Dictionary – Surface Mount Technology Acronym and Abbreviation
Technical Library | 2015-12-23 16:57:27.0
The onset of copper barrel cracks is typically induced by the presence of manufacturing defects. In the absence of discernible manufacturing defects, the causes of copper barrel cracks in printed circuit board (PCB) plated through holes is not well understood. Accordingly, there is a need to determine what affects the onset of barrel cracks and then control those causes to mitigate their initiation.The objective of this research is to conduct a design of experiment (DOE) to determine if there is a relationship between PCB fabrication processes and the prevalence of fine barrel cracks. The test vehicle used will be a 16-layer epoxy-based PCB that has two different sized plated through holes as well as buried vias.
Technical Library | 2021-07-20 20:02:29.0
During the manufacturing of printed circuit boards (PCBs) for a Flight Project, it was found that a European manufacturer was building its boards to a European standard that had no requirement for copper wrap on the vias. The amount of copper wrap that was measured on coupons from the panel containing the boards of interest was less than the amount specified in IPC-6012 Rev B, Class 3. To help determine the reliability and usability of the boards, three sets of tests and a simulation were run. The test results, along with results of simulation and destructive physical analysis, are presented in this paper. The first experiment involved subjecting coupons from the panels supplied by the European manufacturer to thermal cycling. After 17 000 cycles, the test was stopped with no failures. A second set of accelerated tests involved comparing the thermal fatigue life of test samples made from FR4 and polyimide with varying amounts of copper wrap. Again, the testing did not reveal any failures. The third test involved using interconnect stress test coupons with through-hole vias and blind vias that were subjected to elevated temperatures to accelerate fatigue failures. While there were failures, as expected, the failures were at barrel cracks. In addition to the experiments, this paper also discusses the results of finite-element analysis using simulation software that was used to model plated-through holes under thermal stress using a steady-state analysis, also showing the main failure mode was barrel cracking. The tests show that although copper wrap was sought as a better alternative to butt joints between barrel plating and copper foil layers, manufacturability remains challenging and attempts to meet the requirements often result in features that reduce the reliability of the boards. Experimental and simulation work discussed in this paper indicate that the standard requirements for copper wrap are not contributing to the overall board reliability, although it should be added that a design with a butt joint is going to be a higher risk than a reduced copper wrap design. The study further shows that procurement requirements for wrap plating thickness from Class 3 to Class 2 would pose little risk to reliability (minimum 5 μm/0.197 mil for all via types).Experimental results corroborated by modeling indicate that the stress maxima are internal to the barrels rather than at the wrap location. In fact, the existence of Cu wrap was determined to have no appreciable effect on reliability.
This video describes the IPC A-600 training and certification program. The IPC A-600 specification is a set of acceptability specifications for printed circuit boards. These standards determine the acceptance and reject criteria for printed wiring bo
The X2 is an advanced In-line X-RAY inspection system designed for high-speed automatic inspection in production lines. Transmission X-RAY technology is combined with patented Slice-Filter-Technology (SFT) for double-sided PCB assembly and component
Training Courses | | | Other Courses
Other courses related to electronics manufacturing and assembly
Training Courses | | | IPC-7711/7721 Specialist (CIS)
The Certified IPC-7711/7721 Specialist (CIS) training focuses on rework of electronic assemblies and repair and modification of printed boards and electronic assemblies.
SMTnet Express, December 23, 2015, Subscribers: 23,927, Members: Companies: 14,845, Users: 39,621 PCB Fabrication Processes and Their Effects on Fine Copper Barrel Cracks Edward Arthur, Charles Busa, Melissa Durfee, Chad Gibson, Wade Goldman P
| https://www.eptac.com/wp-content/uploads/2021/11/eptac_03_14_12.pdf
Surface Mount Technology Association (SMTA) | https://www.smta.org/icsr/speaker_forms/Paper-Format-Requirements.doc
surface, barrel knee and portions of the barrel wall on numerous barrel locations of the reworked connector. This occurrence of Cu dissolution during PTH rework is not a new phenomenon. In some cases, high degrees of Cu dissolution occurred under Sn-Pb
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