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84 SMT Magazine • December 2016 3. IEEE Std.1149.1-2013, Standard Test Ac- cess Port and Boundary Scan Architecture. 4. Thomas Wenzel / Andreas Türk, The Trou- ble with BGA Solder Joints White Paper, Goepel electronic, 2014. 5. Thomas Wenzel / Martin Borowski, Sin- gle Boundary Scan IC Looking for Connection, White Paper, Goepel electronic, 2014. 6. Thomas Wenzel / J.Heiber, Big Test Strat- egies in Small Packages, White Paper, Goepel electronic, 2015. 7. Product information: VarioTAP – Goepel electronic, 2014. 8. IEEE Std. P1687, Standard for Access and Control of Instrumentation Embedded Within a Semiconductor Device. 9. Product information: ChipVORX – Goe- pel electronic, 2014. 10. Product information: JULIET Desktop Tester Series2 – Goepel electronic, 2015. Thomas Wenzel is vice president at Goepel electronic and responsible for the Boundary Scan division. Enrico Zimmermann is general sales manager for JTAG/ boundary scan and inspection solutions at Goepel electronic. A new, ultrathin film that is both trans- parent and highly con- ductive to electric cur- rent has been pro- duced by a cheap and simple method de- vised by an interna- tional team of nano- materials researchers from the University of Illinois at Chicago and Korea University. The film is bendable and stretchable, offering potential applications in roll-up touchscreen dis- plays, wearable electronics, and flexible solar cells. The results are reported in Advanced Functional Materials. The new film is made of fused silver nanow- ires, and is produced by spraying the nanowire particles through a tiny jet nozzle at superson- ic speed. The result is a film with nearly the elec- trical conductivity of silver-plate—and the trans- parency of glass, says senior author Alexander Yarin, UIC Distinguished Professor of Mechanical Engineering. The researchers suspended the nanowire par- ticles in water and propelled them by air through a de La- val nozzle, which has the same geometry as a jet engine, but is only a few millimeters in diameter. When the nanowires strike the surface they are being applied to at supersonic speed, they fuse together, as their kinetic energy is converted to heat. The researchers applied the nanowires to flex- ible plastic films and to three-dimensional objects. The transparent flexible film can be bent repeated- ly and stretched to seven times its original length and still work, said Sam Yoon, the corresponding author of the study and a professor of mechanical engineering at Korea University. Earlier this year, Yarin and Yoon and their col- leagues produced a transparent conducting film by electroplating a mat of tangled nanofiber with copper. Compared to that film, the self-fused sil- ver nanowire film offers better scalability and pro- duction rate. Supersonic Spray Yields New Nanomaterial for Bendable, Wearable Electronics BOUNDARY SCAN MEETS FUNCTIONAL TEST

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