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DECEMBER 2021 I DESIGN007 MAGAZINE 101 bond, and the connector together, and per- form that in 3D. e extracted 3D wirebond profile needs to be brought into the simula- tor, which is typically a manual process with legacy tools. is also has changed with new tools, which perform faster and yet accurate 3D extraction of the design, and directly read the 3D wirebond profile from a PCB file. e new tools perform much faster simulation of the design, including return and insertion losses, and power-aware analysis with virtu- ally unlimited scalability. is improves the accuracy of extraction, saves time, and elimi- nates the risk of introducing manual errors in the process. Learn how a customer applied this method- ology to solve their camera module design that went into a mobile device. FLEX007 Brad Griffin is a product man- agement group director for the Multiphysics System Analysis Group at Cadence Design Systems, Inc., and the author of The System Designer's Guide to… System Analysis (a free eBook available for download). To read past columns or contact Griffin, click here. Figure 3: 3D view with wirebond profile. reported detectors when irradiated with 20 keV X-rays, equivalent to the energy released during medical diagnostic imaging. Then, to make a flex- ible X-ray radiation detector, the team sandwiched the nickel-containing MOF between gold film elec- trodes, one of which was on a flexible plastic sur- face. They used copper wires to transmit current from each pixel of a 12x12 array and covered the whole device with a silicone- based flexible polymer. Finally, they placed an aluminum letter "H" on the detector and irradi- ated it with X-rays, measuring a much lower current output underneath the H than under the unimpeded material. This device is promising for the next generation of radiology imag- ing equipment and radiation detection when wearable or flexible devices are needed. (Source: ACS—American Chemical Society) X-ray imaging is a fast, painless way for doctors to see inside a patient, but radiation detectors, which go under the body part being imaged, are rigid panels that contain harmful heavy metals. Now, researchers in ACS' Nano Letters report a proof- of-concept wearable X-ray detector prepared from nontoxic metal-organic frameworks (MOFs) layered between flexible plastic and gold electrodes for high-sensitivity sensing and imaging. Detectors that could conform to rounded body parts or mold to the inside of confined spaces could be beneficial in some applica- tions. The researchers mixed a solution of nickel chloride salt and 2,5-diaminobenzene- 1,4-dithiol (DABDT) for sev- eral hours, creating a MOF in which nickel linked the DABDT molecules. In initial tests, the nickel-containing MOF was more sensitive than recently Flexible, Wearable X-ray Detector Doesn't Require Heavy Metals

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