New Equipment | Solder Materials
NC275B Liquid Flux is a water-based VOC-Free flux that has performance and reliability characteristics equal or superior to many alcohol-based fluxes. A medium-solids/residue flux, NC275B can be used with all common lead-free wave soldering alloys in
New Equipment | Cleaning Equipment
A Complete Stencil Cleaning Process - From One Source! Clean solder paste, adhesives and flux residue in one machine Two ultrasonic wash tanks eliminate cross contamination issues Safely clean solder paste at ambient temperature and othe
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
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
Used SMT Equipment | Turnkey Lines
Functional Pre-Owned Complete SMT Assembly Line - Still Operational (Subject to prior sell, I am listing this on other venues) Up for sale is a full turnkey SMT line and all of it's accessories, of which there are a lot, fe
Industry News | 2018-10-18 08:21:10.0
How to Prevent Non-Wetting Defect during the SMT Reflow Process
Industry News | 2009-02-03 13:34:04.0
New PCB Rework, Repair, Fabrication Training & Consulting Services.
Technical Library | 2007-08-16 13:34:31.0
While experienced inspectors may be able to determine the aesthetic differences between a lead-free PCB assembly and a tin-lead version, one cannot rely on the "experienced eye". "Less wetting out to the pad edges" (Figure A) and "graininess and lack of shininess of the solder joint" (Figure B) are typical comments about some lead-free solder joints. However, in cases where a Nitrogen atmosphere was present during the reflow of the solder joint (Figure C), there will be little visual differences between the lead free alloys and their tin-lead counterparts.
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.
A Sustainable Alternative - Humitector cards are halogen-free and cobalt dichloride free. Visit https://www.clariant.com/solutions/products/2017/10/31/00/12/humitector-type-2-nonreversible-humidity-indicator-card?utm_source=CLRYouTube&utm_medium=Vi
Welcome to this Bob Willis Defect of the Month video on BGA inspection, this series of videos were produced for and featured as part of the NPL/IPC video library and examples are taken from the NPL Defect Database. Over the last couple of years there
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.
Events Calendar | Wed Mar 07 00:00:00 EST 2018 - Wed Mar 07 00:00:00 EST 2018 | ,
Solder Paste Qualification Testing - SMTA Webinar
Career Center | , Maryland USA | Engineering
Late stage start-up company, well into commercialization, that develops and manufactures products to precisely control the instantaneous release of heat energy for reaction initiation and joining applications. Building from its strengths in material
Career Center | Wesley Chapel, Florida USA | Engineering,Management,Quality Control
15 years of experience on Electronic Manufacturing. Certified SMT Process Engineer TQM Knowledge Statistics DOE Screen Printer Thermal Process Knowledge JIT International Project Engineering Experience
SMT Express, Volume 2, Issue No. 9 - from SMTnet.com Volume 2, Issue No. 9 Thursday, September 14, 2000 Featured Article Return to Front Page Reflow Profiling The Benefits of Implementing a Ramp-to-Spike Profile by David Suraski /AIM
Heller Industries Inc. | https://hellerindustries.com/wp-content/uploads/2018/07/leadfree.pdf
– No drop-in universal no lead paste – work with vendors is critical – Void formations can be an issue in no leads 5°C - 15°C15°C – 35°C“True” Process Window 230°C – 240°C230°C – 240°CMax PCB Temp 225°C – 235°C205°C - 215°CTypical Peak Temperature Range 216
PCB Libraries, Inc. | https://www.pcblibraries.com/forum/jstd001-plated-throughhole-obstruction_topic2145_post9247.html
) required to be soldered”. Example of Hole Obstruction: This issue pertains to through-hole terminals that are under the component package where the bottom of the package sits directly on the PCB surface and can be resolved by simply lifting the component
