Written by J. Scott Nelson, Harris Corporation, Palm Bay, FL, USA
Tuesday, 09 February 2010
The use of lead-free alloys in commercial electronics has been underway for almost a decade, but the use of lead-free solder in high-reliability applications is still very limited. This is at least in part due to a reluctance to change established assembly processes without historical reliability data.
Jasbir Bath, Roberto Garcia, Christopher Associates Inc., Santa Ana, California, and Noriyoshi Uchida, Hajime Takahashi, Gordon Clark and Manabu Itoh, Koki Solder, Tokyo, Japan
Different devices demand different processes and safety; however,
temperature of the component and reliability are often not included in
the tool selection method.
The following article is a series of "from the trenches" stories taken both from the perspective of an electronics manufacturer and an environmental compliance consultancy.
Solder joint integrity may be compromised through mechanical shock,
particularity in portable electronics using area array devices with
solder balls for interconnections.
Lean Sigma, an approach that has been in practice for several years,
mixes the lean manufacturing concept and problem solving approach with
Six Sigma for a more efficient manufacturing process.
The expansion of business into alternative energy, green components and
energyefficient components is having a significant impact on the
electronics and semiconductor industry.
EMS providers rely on component suppliers to ensure that the leadfree
transition on the component terminations is seamless to their soldering
processes, but that rarely happens.
Written by Robert F. Dervaes, Jeff Poulos, and Scott Williams
Friday, 08 May 2009
This article discusses new developments in stencil laser and material technology and shows how these advancements, when combined, provide comparable and costeffective alternatives to traditional electroformed stencils. The results are improved yields, cycle time reductions and significant cost savings.
Written by Keith Sweatman, Nihon Superior Co., Ltd.
Friday, 08 May 2009
Although the advantages of hot air solder leveling (HASL) in providing
the most robust solderable finish for printed circuit boards are well
recognized, in the years leading up to the implementation of the EU
RoHS Directive in July 2006, the conventional wisdom was that it would
have no place in the new leadfree electronics manufacturing
technology.
Changes in the domestic printed circuit board assembly industry have
resulted in a dominant shift to a highmix, lowvolume (HMLV)
manufacturing environment resulting in a high frequency of line
changeovers.
Written by Stephen Tisdale, Gary B. Long, Roger Krabbenhoft, Kostas Papathomas, Ph.D., and Terry Fischer
Monday, 06 April 2009
The electronics industry is under pressure to eliminate brominated
flame retardants (BFRs) that were once widely used in electronics
housings and cases and are still used extensively in printed circuit
boards.
Written by Heather McCormick, Irene Sterian, Jimmy Chow, Mike Berry, Joel Trudell, Roden Cortero
Monday, 06 April 2009
While already in widespread use in the consumer market for handheld,
portable electronics, package on package (PoP) continues to gain in
popularity and seems likely to be implemented in other types of
electronic assemblies.
Bryan talks to Trevor Galbraith about why he believes that implementing a rigid strategy now will
strengthen Techcon Systems in these challenging times and beyond.
The term/concept of synergy seems very apt when applied to the
interaction of the Occam process solderless assembly concept in
combination with a unique PCB interconnection technology called twisted
wire interconnect or TWI.
Package on package assembly features paste-only assembly or a combination of solder paste at board level and dip flux on the top row of ball terminations.