As the first commercially available adhesive to address the emerging surface-mount market in the 1980s, Loctite Chip bonder and Eccobond products today are the industry standard for mixed-technology and double-sided surface mount technology (SMT) app
New Equipment | Solder Materials
Alpha has a range of flux cored solder wires for component attach, rework and touch-up soldering for through-hole and surface mount technologies. The range includes no-clean, water-soluble and activated rosin fluxes in a variety of solder alloys. A
Electronics Forum | Mon Nov 12 01:18:29 EST 2007 | sin4d
Hi, ALL I experience some QFP with wetting issue on the heel of the lead. There is no fillet wetting on the heel which causes reject bt the customer, but not all the QFP. Could anyone pls help what is the causes of this problem, it is due to oxidati
Electronics Forum | Tue Dec 18 18:36:58 EST 2001 | guicho_v
Is the Sn% of the plating of the pin related to wetting quality?. I am having issues with one IC maker where some pins are OK and one or two pins are not soldered, even when there is weeting evidence underneath the pin. I am blaming the %Sn too hig
Used SMT Equipment | Screen Printers
DEK 03IX automatic solder paste printing machine features advanced up/down k-view vision system, independent control and adjustment of lighting, high-speed moving lens, accurate alignment of PCB PCB and net board. The DEK Horizon 03IX automatic solde
Industry News | 2018-10-18 08:14:11.0
How to Prevent the Tombstone and Open Defects during the SMT Reflow Process
Industry News | 2018-10-18 10:51:08.0
How Conformal Coating Protects PCBs
Technical Library | 2013-02-07 17:01:46.0
Silicone contamination is known to have a negative impact on assembly processes such as soldering, adhesive bonding, coating, and wire bonding. In particular, silicone is known to cause de-wetting of materials from surfaces and can result in adhesive failures. There are many sources for silicone contamination with common sources being mold releases or lubricants on manufacturing tools, offgassing during cure of silicone paste adhesives, and residue from pressure sensitive tape. This effort addresses silicone contamination by quantifying adhesive effects under known silicone contaminations. The first step in this effort identified an FT-IR spectroscopic detection limit for surface silicone utilizing the area under the 1263 cm-1 (Si-CH3) absorbance peak as a function of concentration (µg/cm2). The next step was to pre-contaminate surfaces with known concentrations of silicone oil and assess the effects on surface wetting and adhesion. This information will be used to establish guidelines for silicone contamination in different manufacturing areas within Harris Corporation... First published in the 2012 IPC APEX EXPO technical conference proceedings.
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.
Lyra Reflow Oven is a soft soldering that realizes the mechanical and electrical connection between the solder ends of surface mount components or the pins and the printed board pads by remelting the solder paste pre-distributed on the printed board
ALPHA® Telecore XL-825 lead-free cored solder wire minimizes spattering in hand soldering operations, thus reducing circuit board contamination and enhancing worker safety and comfort.
Training Courses | | | PCB Assembly Courses
The PCB assembly courses provide knowledge of different processes and equipment used in TH and SMT assembly of printed circuit boards.
Heller Industries Inc. | https://hellerindustries.com/causes-defects-reflow-soldering/
What Are Reflow Soldering Defects - Heller Home » What Are Reflow Soldering Defects Reflow Soldering Defects & Causes DEFECT / CAUSE RELATIONSHIP Coplanarity Contamination Metallurgy Solder Quality Solder Volume Reflow Profile Placement Accuracy Land Design Reflow Cycle Too Long Excessive Reflow Temp
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