News
The nickel content of screen print stencils appears to be the figure of merit when migrating to lead-free assembly, according to DEK's study on the impact of stencil materials on paste volume repeatability, paste-on-pad registration and process window.
In the study, paste volume repeatability was close to 90% for pure nickel stencils, with electro-form only slightly ahead. After printing with nickel electro-form stencils, as well as pure nickel and high-nickel-content stencils cut by a YAG laser, the experiment showed pure nickel electro-form to be marginally ahead of pure nickel laser cut. Both types showed better results than other stencils, including acrylic and stainless steel.
The research also shows that lead-free pastes using the Sn96.5Ag3.0Cu0.5 solder alloy continue to display differences in performance. The differences concern the effect of each paste's rheology on its aperture release characteristics, which impacts deposited volume repeatability.
Other factors affecting release efficiency include stencil aperture dimensions and aspect ratio.
DEK collected over five million data points for its experiments. The results show it is important to evaluate a candidate solder paste extensively before adopting it for production. Some assemblers may need to consider migrating to a nigh nickel-content stencil supplier.
The full results are available from DEK representatives or www.dek.com/leadfree.
In the study, paste volume repeatability was close to 90% for pure nickel stencils, with electro-form only slightly ahead. After printing with nickel electro-form stencils, as well as pure nickel and high-nickel-content stencils cut by a YAG laser, the experiment showed pure nickel electro-form to be marginally ahead of pure nickel laser cut. Both types showed better results than other stencils, including acrylic and stainless steel.
The research also shows that lead-free pastes using the Sn96.5Ag3.0Cu0.5 solder alloy continue to display differences in performance. The differences concern the effect of each paste's rheology on its aperture release characteristics, which impacts deposited volume repeatability.
Other factors affecting release efficiency include stencil aperture dimensions and aspect ratio.
DEK collected over five million data points for its experiments. The results show it is important to evaluate a candidate solder paste extensively before adopting it for production. Some assemblers may need to consider migrating to a nigh nickel-content stencil supplier.
The full results are available from DEK representatives or www.dek.com/leadfree.
Round Rock, TX -- In response to mounting pressure from environmentalists, Dell is lowering its cost of recycling for businesses and consumers.
For a limited time, Dell will refurbish or re-cycle an unlimited number of old computer systems with no upfront cost (provided the technology meets certain specifications). Asset Recovery Services will remove customers' old hardware and refurbish or recycle it based on strict environmental guidelines.
Dell has also reduced the price of computer recycling for consumers from $15 to $10. The company continues to offer free recycling to consumers who purchase new desktop or notebook computers. Its global donation partner, the National
Cristina Foundation, also offers U.S. consumers a no-charge donation program for used computers.
According to a report on MSNBC this morning, electronics waste activists actively campaigned for the recycling improvements, and are now seeking to target cell phone manufacturers and Apple Computer for its iPod gadgets.
For a limited time, Dell will refurbish or re-cycle an unlimited number of old computer systems with no upfront cost (provided the technology meets certain specifications). Asset Recovery Services will remove customers' old hardware and refurbish or recycle it based on strict environmental guidelines.
Dell has also reduced the price of computer recycling for consumers from $15 to $10. The company continues to offer free recycling to consumers who purchase new desktop or notebook computers. Its global donation partner, the National
Cristina Foundation, also offers U.S. consumers a no-charge donation program for used computers.
According to a report on MSNBC this morning, electronics waste activists actively campaigned for the recycling improvements, and are now seeking to target cell phone manufacturers and Apple Computer for its iPod gadgets.
MANSFIELD, TX - FCI Electronics, a supplier of high-speed connectors, named Mouser Electronics as a global distributor.
FCI makes connectors, mod jacks, sockets, and other components for BGAs, backplanes and other electronics assemblies.
Mouser Electronics, a privately-held company and subsidiary of TTI, has a base of over 100,000 business customer and focuses on design and prototyping.
Press Releases
- Surf-Tech Manufacturing Corp. Ensures World-Class Quality with Advanced Conformal Coating Services
- Luminovo Partners with Sluicebox to Offer an Industry-First Instant Product Carbon Footprint for Electronics
- The Assembly Show and SMTAI Announce Colocation in October
- SIA Applauds CHIPS Act Incentives for GlobalWafers Projects in Texas and Missouri