Industry News | 2014-09-19 20:19:38.0
KYZEN is pleased to announce that Dr. Mike Bixenman will present the paper titled “QFN Design Considerations to Improve Cleaning – A Follow on Study” at the upcoming SMTA International exhibition.
Technical Library | 2020-11-24 23:01:04.0
The miniaturization trend is driving industry to adopting low standoff components or components in cavity. The cost reduction pressure is pushing telecommunication industry to combine assembly of components and electromagnetic shield in one single reflow process. As a result, the flux outgassing/drying is getting very difficult for devices due to poor venting channel. This resulted in insufficiently dried/burnt-off flux residue. For a properly formulated flux, the remaining flux activity posed no issue in a dried flux residue for no-clean process. However, when venting channel is blocked, not only solvents remain, but also activators could not be burnt off. The presence of solvents allows mobility of active ingredients and the associated corrosion, thus poses a major threat to the reliability. In this work, a new halogen-free no-clean SnAgCu solder paste, 33-76-1, has been developed. This solder paste exhibited SIR value above the IPC spec 100 MΩ without any dendrite formation, even with a wet flux residue on the comb pattern. The wet flux residue was caused by covering the comb pattern with 10 mm × 10 mm glass slide during reflow and SIR testing in order to mimic the poorly vented low standoff components. The paste 33-76-1 also showed very good SMT assembly performance, including voiding of QFN and HIP resistance. The wetting ability of paste 33-76-1 was very good under nitrogen. For air reflow, 33-76-1 still matched paste C which is widely accepted by industry for air reflow process. The above good performance on both non-corrosivity with wet flux residue and robust SMT process can only be accomplished through a breakthrough in flux technology.
Technical Library | 2015-03-04 10:56:26.0
As the proliferation of modern day electronics continues to drive miniaturization and functionality, electronic designers/assemblers face the issue of environmental exposure and uncommon applications never previously contemplated. This reality, coupled with the goal of reducing the environmental and health implications of the production and disposal of these devices, has forced manufacturers to reconsider the materials used in production. Furthermore, the need to increase package density and reduce costs has led to the rapid deployment of leadless packages such as QFN, POP, LGA, and Micro-BGA. In many cases, the manufacturers of these devices will recommend the use of no clean fluxes due to concerns over the ability to consistently remove flux residues from under and around these devices. These concerns, along with the need to implement a tin whisker mitigation strategy and/or increase environmental tolerance, have led to the conundrum of applying conformal coating over no clean residues.
New Equipment | Rework & Repair Equipment
Desktop Reflow Oven For Reballing and Prebumping of SMD Components The new MiniOven-04 is perfectly suitable for a wide range of applications, from small QFNs to very large BGAs. This is due to our extensive selection of stencils and masks for almos
Industry News | 2010-08-27 22:49:53.0
Multitest announces that its Gemini™ series contactors have been chosen by another major semiconductor IDM as the contactor of choice for QFN packages. Gemini™ outperformed the competition in multiple categories over months of evaluation.
Industry News | 2011-09-28 19:53:50.0
AIM announces that Karl Seelig, Vice President of Technology, will present a paper titled “Overcoming the Challenges of QFNs” at the upcoming SMTA International Conference & Exhibition.
Industry News | 2008-03-25 23:22:33.0
Comment from Neil O�Brien, Director � US Sales
Events Calendar | Wed May 10 00:00:00 EDT 2017 - Wed May 10 00:00:00 EDT 2017 | Itasca, Illinois USA
Kester to Host Technical Rework Seminar
Industry News | 2017-01-10 09:49:26.0
Altus Group, a leading distributor of capital equipment for the electronics assembly industry in the UK and Ireland are introducing their customers to the new Rehm Thermal Systems VarioFlex which has been developed for highly selective conformal coating processes.
Industry News | 2008-11-25 16:50:00.0
Release Date: 1-Nov-2008
