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JANUARY 2024 I DESIGN007 MAGAZINE 63 and the designers need to know what and how things can be tested, as well as the controlla- bility and access on the board. But the manu- facturer, contract house, or test development group must understand how that's panelized in the panel layout. Other than talking to you, where can design- ers learn more about test and DFT? At TTCI, we have our own guidelines for in- circuit and flying probe tests. I know XJTAG, Keysight Technologies, Goepel, and JTAG Technologies have DFT guidelines for bound- ary scan and tools. So, if you understand the test methodology that you're utilizing, there are documents available. But it's a challenge to have a standard uniform test guideline. ere are so many different test methodologies. If it's odd-shaped or highly populated, that can make it even tougher. Right. You get some of these boards where you have a part of the circuit with a lot of devices next to each other. When it's very highly populated, it's hard to put in test points. But understand that you can access things through connectors. If someone is putting vias on the board and you can identify one per net, you can identify a potential test point. ere are methods for getting around some of the odd- shaped stuff. DFT is very multifaceted. Good stuff. Thank you, Bert. It's been a pleasure. anks, Andy. DESIGN007 Superconductors are materials that offer no resis- tance to electrical current flowing through them. Combining their study with spintronics, which deals with the intrinsic spin of electrons and their use in electronics, has paved the way for the new field of superconducting spintronics. Developing intricate logic and memory circuits that utilize this unique behavior demands answers to two critical ques- tions: how to efficiently generate spin-triplet Cooper pairs and how to precisely control their behavior. In response to these challenges, researchers have engineered spin-triplet superconducting valves capable of switching superconducting cur- rents on and off as per the need. These valves require only a modest external magnetic field to actively manipulate the behavior of spin-triplet Coo- per pairs. However, they are fabricated from fer- romagnetic Josephson junctions (JJs) consisting of a thin layer of the non-superconducting mate- rial sandwiched between superconductors. They require complex and delicate engineering to pre- vent interference from stray magnetic fields. To make the fabrication of spin-triplet supercon- ducting valves easier, a team of researchers led by Assistant Professor Kun-Rok Jeon from the Depart- ment of Physics at Chung-Ang University, Korea, has now developed an antiferromagnetic analogue of the spin-triplet supercurrent spin valves. While ferromagnetic materials are magnetically attracted, antiferromagnetic materials effectively cancel out magnetic fields, displaying no magnetic attraction. Dr. Jeon highlights the broader implications of their work. "This study can advance the field of superconducting spintronics and potentially lead to a new generation of green supercomputers with much less operation energy compared with that of today's semiconductor technology." (Source: Chung-Ang University) Chung-Ang University Scientist Develops New Antiferromagnetic Superconducting Spin Valves