Technical Library | 2024-04-08 15:46:36.0
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.
New Equipment | Solder Paste Stencils
Stentech produces mini stencils; small stencils that are used mainly for BGA re-work. Mini stencils are designed to deposit precise amounts of solder paste for single BGA footprints on loaded PCBs. These precision stencils mimic the footprint and ape
Industry News | 2012-04-09 13:45:59.0
As the electronics assembly industry evolves, printed circuit board (PCB) features and surface mount technology (SMT) components continue to get smaller and smaller. This miniaturization shrinks the process window at print, placement, and reflow, increasing the opportunities for defects.
InspectScan VPI is a fully integrated, stand-alone process control, measurement and inspection and programming workstation for use in setting up processes before the production floor in the PCB or Hybrid Microcircuit assembly industries. InspectScan
Industry News | 2008-07-30 20:42:23.0
GREELEY, CO � July 30, 2008 � FCT Solder, a division of FCT Assembly and an authorized Licensee of Nihon Superior Co. Ltd.'s SN100C product line, premiers WS170 water soluble solder paste.
New Equipment | Solder Paste Stencils
Fine Line Stencil is a technology leading manufacture, committed to delivering the highest quality laser stencils in the industry. We use the most advanced laser and material technologies available in the world to meet current and future industry de
Industry News | 2018-10-18 08:21:10.0
How to Prevent Non-Wetting Defect during the SMT Reflow Process
Industry News | 2018-10-18 08:39:14.0
Stencil Technology for SMT production
Industry News | 2010-04-10 23:59:50.0
LOS ALAMITOS, CA - Following the success of their 2007 test board and kit, Practical Components and Aim Solder have updated their offering with a new AIM print test board and kit that is designed to include many printing challenges commonly found in manufacturers' assemblies.
New Equipment | Education/Training
Bob Willis has an extensive range of training videos available online. The complete video collection is available to view online for a fixed fee, based on a six month period. After purchase you are provided with links to each of the online videos for
