New Equipment | Solder Paste Stencils
Based on its long work on BGA rework and repair process and its in-house capability to produce metal stencils BEST can provide for you a timely, cost-effective solution for printing on to components for MOST rework systems. Our templates for printing
New Equipment | Solder Paste Stencils
Based on its long work on BGA rework and repair process and its in-house capability to produce metal stencils BEST can provide for you a timely, cost-effective solution for printing on to components for MOST rework systems. Our templates for printin
Electronics Forum | Thu Oct 01 06:18:10 EDT 2009 | rajeshwara
METHOD OF VIA DESIGN AT EXPOSED PAD FOR QFN/QFP.
Electronics Forum | Fri Dec 01 09:29:36 EST 2017 | kojotssss
Hello. We have a problem with QFN type. Component is elevated. Stencils are reduced. Vias is without holes. What are the solutions to fix the fault. Look at the photo. Attachment: https://drive.google.com/open?id=1OIgaXUz2yoKP3fWZg2rUsrmZMBWidk6_
Industry News | 2018-10-18 08:29:16.0
How to Prevent Short Circuits to Ground in QFN Components?
Technical Library | 2024-07-24 01:18:03.0
Quad Flat No-Lead (QFN) packages has become very popular in the industry and are widely used in many products. These packages have different size and pin counts, but they have a common feature: thermal pad at the bottom of device. The thermal pad of the leadless QFN provides efficient heat dissipation from the component to PCB. In many cases, arrays of the thermal via under the component is used to dissipate heat from the device. However, thermal vias can create more voids or result in solder protrusion onto the secondary side.
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."
BEST manufactures and designs SMT stencils-both metal and plastic film type. This video demonstrates our metal stencil laser. See more on stencils here: http://www.soldertools.net/categories/Metal-Stencils/
BEST manufactures and designs SMT stencils-both metal and plastic film type. This video demonstrates our metal stencil laser. See more on stencils here: http://www.soldertools.net/categories/Metal-Stencils/
ASYMTEK Products | Nordson Electronics Solutions | https://www.nordson.com/en/divisions/dage/application/technical-papers-x-ray-inspection
Real Time X-ray Analysis of Void Formation and Dynamics in QFN Devices During Reflow High powered devices require electrical circuits with good thermal conductance and minimal voiding, to maintain long
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