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6 The PCB Magazine • April 2015 VIDeo InTerVIewS Inkjet Solder Mask Becomes a Practical Reality John Davignon Discusses HDPUG SHorTS Fascinating Quantum Transport on a Surface Smart Factory 1.0: the Future of Electronics Manufacturing exTraS Events Calendar Advertisers Index & Masthead InTeRVIew The Challenges of the Fast-Moving Wearables Market ColuMnS Best Practices 101: Part 6 by Steve Williams Copper Discoloration and Other Concerns with OSP by Michael Carano Electrical Test: Surface Finish vs. Water Marks by Todd Kolmodin Design Considerations: Flexible Circuit vs. Traditional PCB by John Talbot newS HIGHlIGHTS Market Supplier/New Product Mil/Aero007 Top Ten PCB007 Highlights Contents 42 48 54 62 68 40 52 60 74 58 66 46 72 76 77 april 2015 Volume 5 Number 4 the defiNitiVe iNteractiVe magaziNe dedicated to the global pcb iNdustry thepcbmagazine.com