Electronics Forum | Tue Jul 25 08:34:30 EDT 2006 | GS
Does your board passes also through the wave solder step ? If, yes, it could be a matter of secondary reflow on BGA ball solder joints. Best Regards....GS
Electronics Forum | Sat Dec 18 08:23:33 EST 2010 | remullis
I experienced warpage on a 7'x 13" long board, unfortunately my oven does not have center support. I use stiffeners on both of the short ends. It fixed my problem. Some of the things I was experiencing with the warpage on the second pass were placem
Industry News | 2015-04-07 11:25:45.0
MIRTEC will highlight its award-winning 2D/3D In-Line AOI Series configured with MIRTEC’s exclusive OMNI-VISION® 3D Inspection Technology in its distributor pb tec solutions’ booth, # 7A-504, at the SMT/Hybrid/Packaging 2015 exhibition, scheduled to take place May 5-7, 2015 at the Messe in Nuremberg, Germany.
Industry News | 2016-09-22 17:27:09.0
IPC — Association Connecting Electronics Industries® invites researchers, technical experts and industry leaders to submit abstracts for poster presentations at IPC APEX EXPO®, the industry’s premier conference and exhibition for printed board design and manufacturing, electronics assembly and test. Poster presentations are scheduled for Wednesday, February 15, 2017, and will be displayed throughout the event, offering additional visibility.
Technical Library | 2019-06-12 10:33:58.0
The success of ball grid array (BGA) placement on electronic assemblies is as much a matter of proper preparation and planning, as it is technique. In some designs, it is more appropriate to apply BGAs using a rework station that isolates the placement of the device, without subjecting the entire assembly to thermal reflow. This is especially beneficial in board constructions where the number of BGAs is limited, and the application of the solder paste is difficult, due to small pitch features that stretch the limitation of the stencil construction. Another application for rework stations, involves very large and thermally conductive BGAs, which will not uniformly reflow with other components on the assembly, and may require special process parameters for their proper placement. The most common use of BGA rework stations are for assemblies requiring BGA removal and replacements due to failures in the initial assembly stage.
Technical Library | 2014-03-06 19:04:07.0
Over the last few years, there has been an increase in the rate of Head-in-Pillow component soldering defects which interrupts the merger of the BGA/CSP component solder spheres with the molten solder paste during reflow. The issue has occurred across a broad segment of industries including consumer, telecom and military. There are many reasons for this issue such as warpage issues of the component or board, ball co-planarity issues for BGA/CSP components and non-wetting of the component based on contamination or excessive oxidation of the component coating. The issue has been found to occur not only on lead-free soldered assemblies where the increased soldering temperatures may give rise to increase component/board warpage but also on tin-lead soldered assemblies.
Bob Willis videos show you How to Do It each month. This month we talk about adhesion testing like copper foil, plated copper on PCBs or conformal coating adhesion to board assemblies. Adhesion testing can be used for many different materials and in
Welcome to this Defect of the Month video on via hole failures and how to see them, this series of videos were produced for and featured as part of the NPL/IPC video library and examples are taken from the NPL Defect Database. Over the last couple of
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SMTA China East Conference 2018
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SMTnet Express, July 6, 2017, Subscribers: 30,558, Companies: 10,626, Users: 23,470 Effects of Package Warpage on Head-in-Pillow Defect Zhenyu Zhao, Chuan Chen, Yuming Wang, Lei Liu, Guisheng Zou, Jian Cai and Qian Wang - Tsinghua University
Heller Industries Inc. | https://hellerindustries.com/wp-content/uploads/2018/07/last-will-of-bga-void.pdf
and Figure 16 clearly shows the significant difference in the reliability of the U1 components, which were located in one corner of the test board, compared to the other BGA56 components. This indicated that the secondary failure mechanism was due to an
Imagineering, Inc. | https://www.pcbnet.com/blog/how-to-tell-if-a-printed-circuit-board-is-bad/
. What Are the Four Most Common Reasons for PCB Failure? Environmental Factors Before fabricating and manufacturing a printed circuit board, it is often critical to assess the environments they are going to be used in
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