New Equipment | Education/Training
All Bob Willis training workshops are run on site at your manufacturing facility, conference or exhibition venues Worldwide. We offer the largest range of theory and hands on workshops in the industry. The content of any workshop may be modified to s
Customer demand for highly sophisticated and ever smaller devices has made semiconductor packaging a vital contributor to system performance. As integrated circuits have become faster and more complex, the cost and performance of the interconnect bet
Electronics Forum | Mon Mar 25 21:50:10 EST 2002 | davef
Some of this was copped from Fred. There are numerous package types that now fall under the rubric of land grid array [LGA]. Land grid devices [ie, Bumped Chip Carrier� [BCC], LGA, Quad Flat-pack No-lead [QFN], MicroLeadFrame�, etc] are essentially
Electronics Forum | Thu Dec 07 17:25:58 EST 2017 | davef
Help me understand your issue better ... Are you looking to: * Improve your products that are used for thermal cycling testing of products of other companies? * Change your production materials so that you pass thermal cycling testing of your produ
Industry News | 2010-07-22 22:37:02.0
IPC — Association Connecting Electronics Industries® has released the B revision of IPC-7351, Generic Requirements for Surface Mount Design and Land Pattern Standard. The leading industry standard for surface mount land pattern design and layout, IPC-7351B provides designers and printed board fabricators with updated guidance on requirements of land pattern geometries used for the surface attachment of electronic components, as well as surface mount design recommendations for achieving the best possible solder joints.
Industry News | 2019-01-30 08:13:02.0
The SMTA is pleased to announce the Best Papers from SMTA International 2018. As speakers at SMTA International, individuals make contributions to the industry by sharing their research and findings. For these exceptional achievements, a cash award and plaque are given to all winners.
Technical Library | 2018-10-03 20:41:44.0
Voids in solder joints plague many electronics manufacturers. Do you have voids in your life? We have good news for you, there are many excellent ways to "Fill the Void." This paper is a continuation of previous work on voiding in which the following variables were studied: water soluble lead-free solder pastes, a variety of stencil designs, and reflow profiles. Quad Flat No-Lead (QFN) component thermal pads were used as the test vehicle. The voiding results were summarized and recommendations were made for reduction of voiding.
Technical Library | 2019-10-10 00:26:28.0
Voids are a plague to our electronics and must be eliminated! Over the last few years we have studied voiding in solder joints and published three technical papers on methods to "Fill the Void." This paper is part four of this series. The focus of this work is to mitigate voids for via in pad circuit board designs. Via holes in Quad Flat No-Lead (QFN) thermal pads create voiding issues. Gasses can come out of via holes and rise into the solder joint creating voids. Solder can also flow down into the via holes creating gaps in the solder joint. One method of preventing this is via plugging. Via holes can be plugged, capped, or left open. These via plugging options were compared and contrasted to each other with respect to voiding. Another method of minimizing voiding is through solder paste stencil design. Solder paste can be printed around the via holes with gas escape routes. This prevents gasses from via holes from being trapped in the solder joint. Several stencil designs were tested and voiding performance compared and contrasted. In many cases voiding will be reduced only if a combination of mitigation strategies are used. Recommendations for combinations of via hole plugging and stencil design are given. The aim of this paper is to help the reader to "Fill the Void."
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
Events Calendar | Wed Jun 20 00:00:00 EDT 2018 - Wed Jun 20 00:00:00 EDT 2018 | ,
Everything You Need to Know About X-Rays
PCB Libraries, Inc. | https://www.pcblibraries.com/products/fpx/3D-STEP_SM-Active.asp
Pull-Back Quad Flat No-Lead D-Shape Lead (PQFN) Pull-Back Quad Flat No-Lead D-Shape Lead with Chamfered Thermal (PQFN) Pull-Back Quad Flat No-Lead D-Shape Lead with Radius Thermal (PQFN
ASYMTEK Products | Nordson Electronics Solutions | https://www.nordson.com/en/divisions/dage/application/x-ray
long life time and optimum performance throughout. One example is the Quad Flat No-leads (QFN) package. This paper examining the issue was presented at SMTAI 2019
