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PCB007-Aug2018

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AUGUST 2018 I PCB007 MAGAZINE 65 ticularly at the lower EP thickness. The IG gold bath should be run per vendor specification as far as gold concentration, temperature, pH, dwell time and age of bath or MTOs (metal turnovers). If a thicker layer of immersion gold is a design criterion, immersion gold should be substituted for "Reduction Assisted" immer- sion gold. This type of gold bath will deposit gold up to 8 µin (0.2 µm) without any Ni cor- rosion in an ENEPIG deposit. Conclusion Nickel corrosion in ENEPIG was reproduced using exaggerated dwell time in the immer- sion gold bath. Nickel corrosion will occur at the manufacturing site if there is an attempt to plate thicker (>2.8 µin (0.07 µm) gold with standard immersion gold chemistry. The gold thickness in the ENEPIG surface finish is specified (IPC-4556) at 1.2–2.8 µin (0.03–0.07 µm). Meeting this specification us- ing standard immersion gold should not create any nickel corrosion. A different gold bath specifically "Assisted Re- duction Immersion Gold" was shown to be capa- ble of depositing higher thickness of gold with- out compromising the nickel substrate. PCB007 This article was originally presented at SMTA International 2017 and published in the pro- ceedings. George Milad is national accounts manager for technology, Uyemura International Corporation. Jon Bengston is chemical product developer, Uyemura International Corporation. Don Gudeczauskas is VP and technical director, Uyemura International Corporation. Figure 11: Phos palladium with reduction-assisted immersion gold. Engineers' International Conference on Robotics and Automation held in Brisbane, Australia. ARL researchers Drs. Maggie Wigness and John Rog- ers engaged in face-to-face discussions with hundreds of conference attendees during their two-and-a-half-hour interactive presen- tation. According to Wigness, one of research team's goals in autonomous systems re- search is to provide reliable autonomous robot teammates to the soldier. Source: U.S. Army Researchers at the U.S. Army Research Laboratory and the Robotics Institute at Carnegie Mellon University de- veloped a new technique to quickly teach robots novel traversal behaviors with minimal human oversight. The technique allows mobile robot platforms to navigate autonomously in environments while carrying out actions a human would expect of the robot in a given situation. The experiments of the study were recently published and presented at the Institute of Electrical and Electronics Army Researchers Teaching Robots to Be More Reliable Teammates for Soldiers

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