@article{ke_mehrotra_hopkins_2021, title={3-D Prismatic Packaging Methodologies for Wide Band Gap Power Electronics Modules}, volume={36}, ISSN={["1941-0107"]}, DOI={10.1109/TPEL.2021.3081679}, abstractNote={In a power module the parasitic inductance limits the dynamic high-frequency performance, and the area of the cooling surfaces limits the power capability. This article presents a new 3-D power electronic design methodology based on the concept of mutual inductance cancellation and multisided heat transfer. New 3-D prismatic packaging concepts are proposed for wide band gap power devices, where the devices can be mounted at acute angles to adjacent interconnects or other devices. Discussion is given on electrical and thermal path optimization in a 3-D space. To validate the 3-D prismatic packaging methodology, a 1200 V/50 A SiC half-bridge power module is fabricated and tested for electrical and thermal performance and results are compared with simulations. The power density calculated for the module is 12 kW/in3 (including heatsink) and shows a 31.3% inductance reduction compared to a 2-D planar module. Finally, design guidance suggested for utilizing prismatic structures is provided, together with suggested future work in the area. This article presents the first reported true 3-D power module.}, number={11}, journal={IEEE TRANSACTIONS ON POWER ELECTRONICS}, author={Ke, Haotao and Mehrotra, Utkarsh and Hopkins, Douglas C.}, year={2021}, month={Nov}, pages={13057–13066} }
 @article{cai_bodle_mathieu_amos_hamouda_bernacki_mccarty_loboa_2017, title={Primary cilia are sensors of electrical field stimulation to induce osteogenesis of human adipose-derived stem cells}, volume={31}, ISSN={["1530-6860"]}, DOI={10.1096/fj.201600560r}, abstractNote={In this study, we report for the first time that the primary ciliumacts as a crucial sensor for electrical field stimulation (EFS)–enhanced osteogenic response in osteoprogenitor cells. In addition, primary cilia seem to functionally modulate effects of EFS‐induced cellular calciumoscillations. Primary cilia are organelles that have recently been implicated to play a crucial sensor role for many mechanical and chemical stimuli on stem cells. Here, we investigate the role of primary cilia in EFS‐enhanced osteogenic response of human adipose‐derived stem cells (hASCs) by knocking down 2 primary cilia structural proteins, polycystin‐1 and intra flagellar protein‐88. Our results indicate that structurally integrated primary cilia are required for detection of electrical field signals in hASCs. Further more, by measuring changes of cytoplasmic calcium concentration in hASCs during EFS, our findings also suggest that primary ciliamay potentially function as a crucial calcium‐signaling nexus in hASCs during EFS.—Cai, S., Bodle, J. C., Mathieu, P. S., Amos, A., Hamouda, M., Bernacki, S., McCarty, G., Loboa, E. G. Primary cilia are sensors of electrical field stimulation to induce osteogenesis of human adipose‐derived stem cells. FASEB J. 31, 346–355 (2017) www.fasebj.org}, number={1}, journal={FASEB JOURNAL}, author={Cai, Shaobo and Bodle, Josephine C. and Mathieu, Pattie S. and Amos, Alison and Hamouda, Mehdi and Bernacki, Susan and McCarty, Greg and Loboa, Elizabeth G.}, year={2017}, month={Jan}, pages={346–355} }
 @inproceedings{de_morgan_iyer_ke_zhao_vechalapu_bhattacharya_hopkins_2016, title={Design, package, and hardware verification of a high voltage current switch}, volume={2016-May}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-84973664278&partnerID=MN8TOARS}, DOI={10.1109/apec.2016.7467887}, abstractNote={This paper demonstrates various electrical and package design considerations in series connecting a high-voltage (HV) silicon (Si)-IGBT (6500-V/25-A die) and a silicon carbide-junction barrier Schottky diode (6500-V/25-A die) to form an HV current switch. The effects of connecting the cathode of the series diode to an IGBT collector, versus connecting the IGBT emitter to the anode of the series diode, are analyzed in regards to minimizing the parasitic inductance. An optimized package structure is discussed and an HV current switch module is custom fabricated in the laboratory. An HV double pulse test circuit is used to verify the switching performance of the current switch module. Low-voltage and HV converter prototypes are developed and tested to ensure thermal stability of the same. The main motivation of this paper is to enumerate detailed design considerations for packaging an HV current switch.}, note={\urlhttps://ieeexplore.ieee.org/document/7467887/}, booktitle={Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC}, author={De, A. and Morgan, A. and Iyer, V.M. and Ke, H. and Zhao, X. and Vechalapu, K. and Bhattacharya, Subhashish and Hopkins, D.C.}, year={2016}, pages={295–302} }
 @inproceedings{sung_huang_baliga_ji_ke_hopkins_2015, title={The first demonstration of symmetric blocking SiC gate turn-off (GTO) thyristor}, ISBN={9781479962594 9781479962617}, url={http://dx.doi.org/10.1109/ISPSD.2015.7123438}, DOI={10.1109/ispsd.2015.7123438}, abstractNote={This paper reports the development of symmetric blocking SiC p-GTO thyristors. The proposed thyristor structure features a positive bevel edge termination implemented by orthogonal dicing technique. In this paper, a detailed design of the device structure, forward current-voltage characteristics, and symmetric blocking capabilities are discussed.}, note={\urlhttps://ieeexplore.ieee.org/document/7123438/}, booktitle={2015 IEEE 27th International Symposium on Power Semiconductor Devices & IC's (ISPSD)}, publisher={IEEE}, author={Sung, Woongje and Huang, Alex Q. and Baliga, B. J. and Ji, Inhwan and Ke, Haotao and Hopkins, Douglas C.}, year={2015}, month={May}, pages={257–260} }