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AUGUST 2019 I PCB007 MAGAZINE 9 to fit pre-existing facilities. Wrapping up the features, Cerambus' Mike Wood discusses "The Advantages of Non-sludge Acid Copper Products." Columnist Mike Carano debuts his next se- ries off the starting blocks with "Via Hole Fill- ing and Plugging, Part 1." Of course, in wet processing, rinsing is a critical step, so Happy Holden's article addresses "Pollution Preven- tion Techniques: Rinse Water Reduction." And finally, Saminda Dharmarathna, et al., cover "Innovative Electroplating Processes for IC Substrates: Via, Through-hole, and Embedded Trench Fill." Mike Hill also debuts Part 1 of his column, "The Past 15 Years—Changes to MIL- PRF-31032 Certification, Part 1." Continuing with the technical pieces, Steve Iketani and Mike Vinson post their re- Nolan Johnson is managing editor of PCB007 Magazine. Nolan brings 30 years of career experience focused almost entirely on electronics de- sign and manufacturing.To contact Johnson, click here. search on "Semi-additive Process (SAP) Uti- lizing Very Uniform Ultrathin Copper by a Novel Catalyst." Then, we continue Part 3 of Joan Tourné's series on vertical conduc- tive structures (VeCS) and design techniques, along with Ed Hickey and Mike Catrambone. Nikolaus Shubkegel makes his return to the magazine with his article, "Solder Mask Cur- ing: UV Bump Overview." Now, by all means, load up your plate! PCB007 coffee, or black tea is spilled on a dress, it's difficult to get rid of these stains. The main reason is that they all contain tannic acid, which can firmly adsorb the material on the surface of the fiber. This good adhesion is exactly what we need for durable wearable, conductive devices." The research was published in the journal Small. The over- all impact of this new method could see a reduction in price for wearable technology, along with improvements in comfort and robustness. The improved conductivity can allow technology devel- opers to use more comfort- able fabrics, such as cotton, to replace nylon. The technol- ogy can also allow for circuits to be printed directly on to the surface of clothing to make a comfortable, flexible circuit board. (Source: The University of Manchester) Extracting tannic acid from red wine, coffee, or black tea led a team of scientists from The University of Manchester to develop much more durable and flexible wearable devices. Previously, wearable tech- nology has been subject to fail after repeated bending and folding, which can interrupt the conductivity of such devices due to micro-cracks. Improv- ing this could open the door to more long-lasting integrated technology. "We are using this method to develop new flexible, breath- able, wearable devices. The main research objective of our group is to develop com- fortable wearable devices for flexible human-machine inter- face," said Dr. Xuqing Liu, who led the research team. "Tradi- tional conductive material suf- fers from weak bonding to the fibers, which can result in low conductivity. When red wine, Red Wine May Hold the Key to Wearable Electronics

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