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42 DESIGN007 MAGAZINE I AUGUST 2019 lems that we're looking for and their level of interest. Matties: I was at a local design house last week, asking them how they were finding designers, and they said they're not. They're bringing people in; they've created their own training curriculum, and they have to train their own designers. Williams: We're definitely seeing that because others send those people to us. We train them on PCB design first, and then we train them on Pulsonix. Matties: We talked about training and tools. What advice would you give a designer in this market space? Williams: Do your research. Ensure you under- stand the full process and learn the tool before you start, especially for new designers. Also, understand what you're designing in terms of how it's going to be physically made, and then try and understand some of the manufacturing constraints and rules. Talking to your manu- facturer earlier is important too; sooner is bet- ter than later. Matties: And that's great advice. But some- times, they may not know who the fabrica- tor will be when they're designing the board. What advice would you give for that situation? Williams: Talk to a couple of people and take a consensus because you'll generally find that a low-cost manufacturing process will have cer- tain rules, and I expect those rules are applied across multiple manufacturers. If you're doing tracking gap for 8–10 mils, that's going to be translated across multiple vendors for making boards, regardless of whether they're a proto- type or not. And whether you're doing a two- or four-layer, you must understand the ram- ifications of doing a four-layer rather than a six-layer or a two-layer instead of a four-layer due to the costs and the technologies involved, what drilling sizes you need, etc. Matties: Bob, thanks for speaking with me today. Williams: Thank you very much for coming in. I appreciate you taking the time. DESIGN007 Sponsored Links • • Pulsonix Version 10.5 New Features • Free Trial When two mesh screens are overlaid, beautiful patterns appear when one screen is offset. These "moiré patterns" have long intrigued artists, scientists and mathemati- cians and have found applications in printing, fashion and banknotes. Now, a Rutgers-led team has paved the way to solving one of the most enduring mysteries in materials physics by dis- covering that in the presence of a moiré pattern in graphene, electrons organize themselves into stripes, like soldiers in formation. "Our findings provide an essential clue to the mystery con- necting a form of graphene, called twisted bilayer graphene, to superconductors that could work at room temperature," said senior author Eva Y. Andrei, Board of Governors profes- sor in Rutgers' Department of Physics and Astronomy in the School of Arts and Sciences at Rutgers University-New Brunswick. Graphene—an atomically thin layer of the graphite used in pencils—is a mesh made of carbon atoms that looks like a honeycomb. It's a great conductor of electricity and much stronger than steel. Using a technique invented by Andrei's group to study twisted bilayer graphene, the team discovered a state where the electrons organize themselves into stripes that are ro- bust and difficult to break. "Our team found a close resemblance between this fea- ture and similar observations in high-temperature supercon- ductors, providing new evidence of the deep link underlying these systems and opening the way to unraveling their en- during mystery," Andrei said. (Source: Rutgers University) Physicists Make Graphene Discovery That Could Help Develop Superconductors

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