New Equipment | Solder Materials
Superior Drop Shock Performance AND Thermal Cycling Reliability Current Industry Dilemma The standard set of Pb-free alloys has a dramatic trade-off between thermal cycling and drop testing. Additionally, all these SAC alloys are far inferior to
Electronics Forum | Mon Sep 20 11:21:48 EDT 2010 | tony1
I have this NiPdAu small QFN packge sizes less than 2x2. I tried to do solderability Dip And Look test and there's always some units no wet on either ground pad and small I/O. Can someone help to explain why is this so difficult to set on this surfac
Electronics Forum | Fri Jan 20 09:58:48 EST 2006 | adlsmt
We are using SAC for reflow because of the lower temp and better wetting and copper disolution is not so much an issue in reflow. There is not much difference in the alloys and they can be mixed with no problems. I assume any supplier of SN100C cou
Industry News | 2010-03-22 13:14:36.0
GREELEY, CO — FCT Assembly introduces its NL930PT no-clean, lead-free, halide-free pin probable solder paste. The product is unique in that it is a clear residue paste that can print down to low surface area ratios consistently. Combined with SN100C, this solder paste produces the most cosmetically appealing solder joint available on the market.
Industry News | 2010-03-22 13:59:02.0
GREELEY, CO — FCT Assembly introduces its NL932 no-clean, lead-free, halide-free solder paste. The paste features excellent solderability, enabling the process to handle the most difficult wetting requirements.
Technical Library | 2023-08-04 15:27:30.0
A designed experiment evaluated the influence of several variables on appearance and strength of Pb-free solder joints. Components, with leads finished with nickel-palladium-gold (NiPdAu), were used from Texas Instruments (TI) and two other integrated circuit suppliers. Pb-free solder paste used was tin-silver-copper (SnAgCu) alloy. Variables were printed wiring board (PWB) pad size/stencil aperture (the pad finish was consistent; electrolysis Ni/immersion Au), reflow atmosphere, reflow temperature, Pd thickness in the NiPdAu finish, and thermal aging. Height of solder wetting to component lead sides was measured for both ceramic plate and PWB soldering. A third response was solder joint strength; a "lead pull" test determined the maximum force needed to pull the component lead from the PWB. This paper presents a statistical analysis of the designed experiment. Reflow atmosphere and pad size/stencil aperture have the greatest contribution to the height of lead side wetting. Reflow temperature, palladium thickness, and preconditioning had very little impact on side-wetting height. For lead pull, variance in the data was relatively small and the factors tested had little impact.
SnCu Based Alloy Design for Lower Copper Dissolution and Better Process Control If you don't see images, please visit online version at: http://www.smtnet.com/express/ News Forums SMT Equipment Company Directory Calendar Career
Surface Mount Technology Association (SMTA) | https://www.smta.org/icsr/speaker_forms/Paper-Format-Requirements.doc
adding each of these above additives. In addition, both time zero analysis and ATC (0-100°C) thermal reliability analysis of the Sn-Cu + Ni solder vs. SAC405 will also be discussed. Finally, the manufacturing impact when altering the Pb-free PTH alloy will
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