Technical Articles From Dell Inc
Read technical articles about electronics manufacturing added by Dell Inc
- SMTnet
- »
- Technical Library
- »
- Contributors
- »
- Articles from Dell Inc
2 technical articles added by Dell Inc
Company Information:
Rethinking the Evolution of the PC industry
Jul 30, 2024 | Dell Inc
The computer industry is one of continual innovation and development, pushing the boundaries of possibility with constantly evolving products. As user needs and demands constantly change and increase, the industry must ensure products meet not just current demands, but also future requirements - resulting in faster, higher performing PCs and hardware. The foundation that this culture of innovation is built on is standards. Widely accepted and utilized standards are necessary to ensure a level playing field throughout any industry, and serve as the building blocks that future innovations can be built on. Standardization of technology is necessary to ensure products not only meet user needs consistently and reliably, but also ensures a level of guaranteed functionality and stability for industry innovators to improve upon. In turn, these advances can offer industrywide improvements and user benefits that then set the new industry standard, becoming the recognized baseline of efficiency and effectiveness that the next generation of innovation is built on....
Creep Corrosion On Lead-Free Printed Circuit Boards In High Sulfur Environments
Mar 16, 2022 | Randy Schueller
The material and process changes required to eliminate lead from electronics as required by Restriction of Hazardous Substance (RoHS) legislation was likely to result in new quality and reliability issues. The industry had over 50 years experience with tin-lead solders. Changing to different solder alloys, fluxes, termination plating materials, PCB surface finishes and soldering temperatures in a span of 1-2 years was a high risk undertaking. Although many potential issues were uncovered and resolved, one new failure mechanism was not foreseen by the industry. Immersion silver (ImAg) was widely adopted to replace hot air solder level (HASL) as the surface finish on PCBs. ImAg was known to tarnish when exposed to sulfur, but it was a surprise to find that it suffers extensive creep corrosion when the sulfur and humidity levels are high enough. Failures can occur in as little as a few weeks in industries such as rubber manufacturing, water treatment, paper mills or fertilizer production, among others. This paper uncovers the root cause of the creep corrosion mechanism and shows how to eliminate it. Corrosive environments were measured and the results of field testing of various surface finishes in these environments is shared. Also presented are some more effective corrosion test methods currently under development....
