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.
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.
Industry News | 2023-10-23 09:57:34.0
Koh Young Technology, the leader in True3D™ measurement-based inspection solutions changed the industry over 20-years ago with its multi-projection solder paste inspection machine. The electronics manufacturing industry quickly adopted the patented technology, which is now the de facto standard SPI machine in the market. On 30 October during the SMTA Tampa Bay Technical Forum, Ray Welch, Senior Applications Engineer at Koh Young will discuss the growing importance of SPI as a process improvement tool.
Industry News | 2013-03-21 12:56:10.0
Andrew Murrietta CEO and co- owner of Murrietta Circuits announced that his company had provided some high-density rigid-flex circuit boards for an experimental medical device that can be implanted in the human brain and be used to control a prosthetic arm, purely by the thoughts of the patient.
Industry News | 2011-09-14 11:46:09.0
P. D. Circuits has been named on Business NH Magazine’s Top 100 Private Companies list.
Industry News | 2022-03-29 07:09:55.0
EVS International is pleased to announce that it has signed on Circuit Technology, Inc. (CTI) as its manufacturers' representative. Bob Doetzer will represent EVS' solder recover systems in North and South Carolina.
Industry News | 2010-08-10 10:43:15.0
APS Novastar's new video provides an overview of its SPR line of Stencil Printers for printed circuit board (PCB) assembly and demonstrates the ease of product set up and use.
Industry News | 2017-10-05 19:30:49.0
Nordson MARCH will present the paper, Enhancing the Performance of Printed Circuit Board Assemblies Using Plasma Treatment, at SMTA Guadalajara 2017. David Foote, Global Applications Manager, Nordson MARCH, will discuss the fundamentals of plasma treatment. Specific applications and examples will be shown to demonstrate the many uses and benefits of plasma processing for printed circuit board assemblies (PCBAs), including managing electrostatic discharge (ESD) damage.
Industry News | 2023-08-29 07:28:07.0
Seika Machinery, Inc. is excited to announce an upcoming SMTA Technical Webinar titled "Effectiveness of Strain Gage Methodology for Durable Board Design." The webinar will be presented by Seika Machinery's principal, James Hara, Principal at Kyowa Electronic Instruments Co., Ltd.
Industry News | 2011-06-16 15:01:31.0
Kyzen announces that Dr. Mike Bixenman will host an upcoming IPC Webinar titled “Cleaning Highly Dense Circuit Assemblies and Advanced Packages” on Tuesday, July 19, 2011 from 10-11 a.m. CST.
COT specializes in high quality SMT nozzles and consumables for pick and place machines. We provide special engineering design service of custom nozzles for those unique and odd components.
2481 Hilton Drive
Gainesville, GA USA
Phone: (770) 538-0411
