Issue link: https://iconnect007.uberflip.com/i/1532278
FEBRUARY 2025 I DESIGN007 MAGAZINE 45 an EE degree, but to join PCB design at Gar- min, we would like designers who have a two- year degree in electronics or the equivalent. We care about your capability to read and under- stand schematic and design requirements. Plus, I'm sure you will end up training them along the way. Exactly. What's cool about being a PCB designer at Garmin is the variety of work. You don't just work on aviation or marine, auto- motive, or watches. You go from a big panel mount aviation board with thousands of FPGA pins and nine DDR4s to a tiny watch board where you're breaking all the design rules to get everything in there. We also do flex. If there is a technology out there, we design with it. I didn't know Garmin did flex. Oh, yeah. Flex is becoming much more prevalent. What do you like best about working at Garmin? I love going to work every day with my friends and making cool stuff. We make a wide variety of products and we fuel people's passion with our products. When I'm visiting my friend in Norway, and I see someone who has a Garmin watch on, I say, "Oh, do you like it?" ey just want to gush about how much it has improved their training, and that's cool. It's also cool to go to a marina and see Gar- min everywhere. We're also big in aviation. Anything that's out there—an activity you do or somewhere you go—there's a Garmin prod- uct for that. Going into a Best Buy and seeing your products on the shelves and saying, "at one's mine," or seeing a commercial on TV, where you feel, "Yeah, we did that." It's pretty cool. Nothing gets made without PCB design- ers. It's awesome to have that ability. LB, it was great talking with you. Keep on making cool products. Definitely. anks, Andy. DESIGN007 A research team led by Professor Oh-Hoon Kwon in the Department of Chemistry at UNIST has announced the development of a versatile nanothermometer, capable of accurately measur- ing the temperature of micro-samples in trans- mission electron microscopy (TEM). In TEM, the electron beam acts as a source of illumination for observing the microstructure of a sample and is also employed for temperature measurements. In this study, the research team enhanced the reliability and versatility of the thermometer by selecting different nanothermometer materials. They chose dysprosium ions (Dy 3+ ) as the active material for cathode ray emission, allowing for improved performance. Researcher Won-Woo Park, the lead author of the study, explained, "The distribution of quan- tum states in the CL spectrum of Dy 3+ follows a Boltzmann distribution that is solely dependent on temperature, regardless of the strength of the electron beam." The Boltzmann distribution is a statistical distribution that describes the phe- nomenon by which the proportion of high-energy quantum states increases with rising temperature. The research team incorporated Dy 3+ into yttrium vanadate (YVO 4 ), a material capable of withstanding the high energy of the electron beam, to synthesize nanothermometer particles measuring 150 nm. When evaluated over a tem- perature range from -170°C to 50°C, the mea- surement error of the developed thermometer was within approximately 4°C. Additionally, the team successfully raised the temperature by irra- diating the sample with a laser beam and tracked the spatial distribution of temperature changes. The study was co-authored by Dr. Pavel K. Olshin, the primary author, and Professor Ye-Jin Kim, co-author. The research findings were published in the December 2024 issue of ACS Nano. Source: UNIST Breakthrough in Nanothermometry: Real-time Observation of Material Structure and Temperature