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.
New Equipment | Assembly Services
Benefit from our versatility and experience. We manufacture rigid printed circuit boards, rigid-flex and flexible printed circuit boards [including crimp technology]. You`ll find us flexible as far as dimensions are concerned: in addition to standard
ALPHA® Preforms with solder paste adds solder volume.
In-Line X-ray Inspection System Automatically in-line inspect Solder joint defects of PCBA and other defects on Hidden Components. Able to judge Good/NG fast with inspection speed of 1sec/FOV and the program can set ROIs conveniently. Performing X-r
New Equipment | Cleaning Agents
CYBERSOLV® C8882 is a fast-acting stencil cleaning solvent designed for the understencil wipe process. CYBERSOLV® C8882 instantly dissolves all flux types within the solder paste, including water soluble, rosin and low residue no-clean fluxes. CYBERS
ITW EAE MPM Edison Printing System
3D In-line Automated X-ray Inspection system (machine) Model: X-eye 6300 X-ray Tube: 160kV / 500 µa Table Size: Max. 330 x 250mm Min. 50 x 50mm Detector: 12 inch FPXD Defection type (Application): BGA, PoP, chip, QFN, QFP, etc. - High-speed In-lin
Industry News | 2010-10-26 22:46:06.0
FCT Assembly introduces the new NC676 no-clean leaded solder paste, featuring its latest technology in print and reflow in the no-clean category.
New Equipment | Cleaning Equipment
Stencil Wiping Rolls are used to remove residual solder paste from the bottom side of PC Board stencils. Using Stencil Wiping Rolls prevents smearing, bridging, and solder balls caused by normal printing of solder paste onto PC Boards. We manufactur
Industry News | 2020-06-07 04:44:33.0
PDR X-ray Solutions is pleased to announce that its 2D and 2D+ X-ray systems have set a new industry standard for high-quality X-ray images at an affordable price. Choosing the correct system for your requirements such as X-ray for quality control or X-ray for process control is vital for the success of both X-ray circuit board inspection programs as well as X-ray semiconductor inspection programs.