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SUMMARY:Piezoelectric thin films: key materials for micro and communicatio
 ns technology
DTSTART:20200427T171500
DTSTAMP:20260414T021756Z
UID:f0a80fcdbe62e5dde318df7e8fa74896b2652adf4d3b3181475ead7f
CATEGORIES:Inaugural lectures - Honorary Lecture
DESCRIPTION:Prof. Paul Muralt\, EPFL\nThe event is postponed. The new date
  will be communicated as soon as possible.\n\n\nAfter 20–30 years of res
 earch and development\, micro devices based on piezoelectric thin films ar
 e now finding applications in several markets\, such as RF filters for mob
 ile phones and high-resolution ink jet printing. Many more applications ar
 e in the emerging phase. The advantages of piezoelectric coupling in elect
 ro-mechanical systems are now recognized by a growing community of microsy
 stems engineers. This talk will begin with a short overview of the field i
 ncluding my own research\, outlining some of the challenges in growing thi
 n films of PZT and AlN-ScN alloys. I will then discuss applications at RF 
 frequencies in the lower GHz range as used for signal transmission in mobi
 le communications. This is a particularly promising and important applicat
 ion\, since sound waves at these RF frequencies can be trapped within a fe
 w micrometers – meaning resonators can be designed that are about 100 ti
 mes smaller than if the electromagnetic waves are trapped directly. In add
 ition\, the acoustic quality of selected piezoelectric materials is so hig
 h that no other method can compete at these small dimensions. This new mic
 rosonics technology will be essential for smart phones and 5G networks. I 
 will draw on my own research to explain recent developments in this field.
  In addition to communications applications\, I will also discuss a number
  of new sensor applications. The most interesting are the wireless ones th
 at do not need a power supply.\n\nBio:\n\nPaul Muralt is an honorary profe
 ssor at the Swiss Federal Institute of Technology (EPFL) in Lausanne\, Swi
 tzerland. He holds a PhD in incommensurate phase transitions from the Inst
 itute of Solid State Physics at ETH Zurich (1984). He began his career at 
 the IBM Research Laboratory in Zurich\, where he developed a pioneering el
 ectric surface potential mapping method using STM. He then worked at the F
 ree University of Berlin and at a thin-film coating manufacturer (Balzers)
  before joining the Ceramics Laboratory at EPFL’s Materials Science Inst
 itute in 1993. Muralt leads a research group on electroceramic thin films 
 for micro- and nanotechnology\, and is particularly well known for his wor
 k in processing\, functional characterization and MEMS applications for pi
 ezoelectric and pyroelectric thin films such as PbZrTiO3\, AlN and AlScN. 
 He has authored or co-authored over 250 journal articles that together hav
 e been cited 14\,000 times. He has taught classes on thin film deposition\
 , micro- and nanostructuration and surface analysis\, and an introduction 
 to ceramics. An IEEE Fellow\, Muralt received the outstanding achievement 
 award at the 2005 International Symposium of Integrated Ferroelectrics and
  the C.B. Sawyer award for innovation in materials at the 2016 IEEE Intern
 ational Frequency Control Symposium. He served as co-chair of the MRS spri
 ng meeting in 2008\, and in 2019 was the General Chair of a large joint co
 nference in Lausanne that included the IEEE International Symposium on App
 lications of Ferroelectrics.\n\nProgram:\n\n	Introduction from Prof. Harm-
 Anton Klok\, Institute of Materials Science and Engineering Director\n	Hon
 orary Lecture from Prof. Paul Muralt - « Piezoelectric thin films: key m
 aterials for micro and communications technology”\n\nRegistration:\nhttp
 s://go.epfl.ch/muralt\n\n 
LOCATION:SV 1717 https://plan.epfl.ch/?room==SV%201717
STATUS:CONFIRMED
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