Lj. Ristic
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Lj. Ristic | |
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| Born | 1950 Nis, Yugoslavia |
| Nationality | Serbian American |
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| Alma mater | University of Nis |
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Lj (Ljubisa) Ristic , born 1950 in Nis, Yugoslavia, is a Serbian American engineer, scientist, and entrepreneur known for his contributions to semiconductor technology and devices, sensors, microelectromechanical systems (MEMS), RF systems, and optoelectronic systems.
Education
He earned multiple degrees in electronics, including Bachelor of Science (BS), Master of Science (MS), and Ph.D. from University of Nis, Serbia, in 1975, 1982 and 1988, respectively. He also earned on 1997 an MBA in global management from the Thunderbird School of Global Management[1] in Arizona.
Career Overview
Ristic's career includes work in both industry and academia. His research has revolved around the design and fabrication of semiconductor solid-state devices and systems, encompassing sensors, microelectromechanical systems (MEMS), RF solutions, and optoelectronic systems.
During his early career at Electronics Industry Nis, he concentrated on the impact of semiconductor processing on the performance of semiconductor devices[2] and the investigation of surface effects on the breakdown voltage of p-n junctions.[3] This resulted in the development of a high-volume manufacturing process for reliable products with stable breakdown voltage, leading to the production of millions of reliable devices.
In 1985, Ristic relocated to Canada, joining the Faculty of Electrical Engineering at the University of Alberta, where he continued his research into sensors and MEMS technology while teaching and mentoring students in master's and Ph.D. programs. By 1989, he had achieved the rank of full professor. His work included magnetic field sensor based on bipolar transistors,[4] silicon Hall devices,[5] and the pioneering development of integrated devices for three-dimensional sensing of magnetic fields.[6][7] He also made contributions to silicon micromachining in CMOS technology.[8]
In 1990, Ristic moved to the USA and joined Motorola in Phoenix, where he led the sensor device group and played a key role in advancing MEMS technology. He developed innovative technologies, including three-polysilicon layer surface micromachining technology and plastic packaging with electrostatic discharge protection.[9][10][11] His work also encompassed the integration of sensing technology with CMOS technology, resulting in significant intellectual property related to microprocessor and sensor integration.[12] Ristic received several awards for his contributions at Motorola, including a Distinguished Innovator, a Golden Badge, and a Silver Quill Award.
In 2000, he assumed the role of Vice President of Technology and Chief Technology Officer at Alpha Industries in Massachusetts.[13] There he focused on advancing RF technologies and creating new products for wireless, consumer, and fiber-optic applications. He pioneered the development of RF front-end multichip integrated module, which included InGaP power amplifiers, switches, and filters.[14] These components have since become a standard components in modern smartphones, tablets, laptops, and other consumer devices.
After his tenure at Alpha Industries, he continued to work with various startups,[15] contributing to wide range of technological innovations including sensing solutions based on tunnel magnetoresistance technology,[16][17] MEMS-based battery solutions,[18] dynamic laser light solutions for automotive applications,[19] and the fusion of Lidar and projection technology.[20]
Publications
Throughout his career, Lj. Ristic has authored more than 100 scientific papers and edited the first book on silicon micromachining technology.[21][22][23] He has also written extensively on various topics in semiconductor technology, investigating trends related to sensor fusion,[24] transceivers,[25] microprocessors,[26] and MEMS mirrors.[27][28]
References
- ↑ "Thunderbird School of Global Management". thunderbird.asu.edu.
- ↑ 1. Lj. Ristic et al. "Stress in epitaxial silicon layer caused by CVD-SiO2 densification – influence on transistor characteristics", Proc. 23rd ETAN, Maribor, pp. I347 – I354, June 1979
- ↑ N.D. Stojadinovic, Lj. Dj. Ristic and B.V. Vidanovic, "New technique for fabrication of low voltage Si Zener diodes", Electronics Letters, vol.17, No.3, pp. 130-132, Feb. 1981
- ↑ Lj. Ristic, T. Smy, and H.P. Baltes, "A lateral magnetotransistor structure with linear response to the magnetic field", IEEE Trans. on ED, vol. 36, No. 6, pp. 1076 – 1086, June 1989
- ↑ Lj. Ristic, M. Paranjape, and M. T. Doan, "2-D Magnetic field sensor based on Vertical Hall Device", Tech. Dig. SSSA Workshop, Hilton Head Island, pp.111=113, 1990
- ↑ Lj. Ristic, M. Doan, and M. Paranjape, "3-D magnetic field sensor as a lateral magnetotransistor in CMOS technology", Sensors and Actuators, vol. A22, pp. 770 -775, 1990
- ↑ Lj. Ristic and M. Paranjape, "Hall devices for multidimensional sensing of magnetic field", Sensors and Materials, vol. 5, no. 5, pp. 301 -316, 1994
- ↑ Lj. Ristic, "CMOS technology: a base for micromachining", Microelectronics J., vol. 20, Nos. 1-2, pp. 153 – 169, 1989
- ↑ Patent US5146389, "Differential capacitor structure and method", 1992-09-08
- ↑ Ristic et al. "A capacitive type accelerometer with self-test feature based on double-pinned polysilicon structure", 7th Int. Conf. SSSA, Transducers '93, Yokohama, June 1993
- ↑ Patent US5545912, "Electronic device enclosure including a conductive cap and substrate", 1996-08-13
- ↑ Patent US5291607, "Microprocessor having environmental sensing capability", 1994-03-01
- ↑ https://investors.skyworksinc.com › news-release-details
- ↑ Lj. Ristic et al. "RF module solutions for the wireless handset market – part 1: switch-filter modules", Microwave Product Digest, Nov. 2001
- ↑ "Crocus Technology secures its first million unit shipment of magnetic sensors" (PDF). crocus-technology.com. July 15, 2014.
- ↑ Patent US2016084674A1, "Apparatus and Method for Magnetic Sensor Based Surface Shape Analysis", 2016-03-24
- ↑ Frank, Randy (September 15, 2015). "MLU Technology for Sensor Products, interview with LJ Ristic". sensortips.com.
- ↑ Patent US20210135271A1, "Method of fabricating porous wafer battery", 2021-05-06
- ↑ Patent US20200200363A1, "Fiber-delivered laser-induced dynamic light system", 2020-06-25
- ↑ D. Lovel et al. "Optical MEMS enable next generation solutions for robot vision and human-robot interaction", Proc. SPIE, vol.12013, id.1201304 15pp., March 2022
- ↑ Ristic, Ljubisa, ed. (1994). Sensor Technology and Devices. Boston: Artech House. ISBN 0-89006-532-2.
- ↑ "Book Review: "Sensor Technology and Devices", Lj. Ristic (ed.)". Measurement Science and Technology. 11 (12): 1829. December 2000. doi:10.1088/0957-0233/11/12/710.
- ↑ https://www.+barnesandnoble.com/w/sensor-technology-and-devices-ristic-ljubisa-ristic/1124243383
- ↑ Ristic, Lj. (September 3, 2012). "Sensor fusion and MEMS for 10-DoF solutions". EETimes.com.
- ↑ "Petrov Group Announces Study Of Transceiver Strategies For 3G Handsets". wirelessdesignonline.com. March 6, 2006.
- ↑ "Baseband processors still essential, says Petrov Group". May 3, 2011.
- ↑ Ristic, Lj. (July 24, 2023). "MEMS mirrors: The next big wave in MEMS technology". laserfocusworld.com.
- ↑ Reprint, with permission from Laser Focus (4 October 2023). "MEMS Mirrors: The Next Big Wave in MEMS Technology". www.electronicdesign.com.
External links
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