Title :
High-temperature 434 MHz surface acoustic wave devices based on GaPO/sub 4/
Author :
Hamidon, Mohd Nizar ; Skarda, Vlad ; White, Neil M. ; Krispel, Ferdinand ; Krempl, Peter ; Binhack, Michael ; Buff, Werner
Author_Institution :
Sch. of Electron. & Comput. Sci., Southampton Univ.
fDate :
12/1/2006 12:00:00 AM
Abstract :
Research into surface acoustic wave (SAW) devices began in the early 1970s and led to the development of high performance, small size, and high reproducibility devices. Much research has now been done on the application of such devices to consumer electronics, process monitoring, and communication systems. The use of novel materials, such as gallium phosphate (GaPO4), extends the operating temperature of the elements. SAW devices based on this material operating at 434 MHz and up 800degC, can be used for passive wireless sensor applications. Interdigital transducer (IDT) devices with platinum/zirconium metallization and 1.4 mum finger-gap ratio of 1:1 have been fabricated using direct write e-beam lithography and a lift-off process. The performance and long-term stability of these devices has been studied, and the results are reported in this paper
Keywords :
electron beam lithography; gallium compounds; interdigital transducers; surface acoustic wave devices; wireless sensor networks; 1.4 micron; 434 MHz; GaPO4; communication systems; consumer electronics; direct write e-beam lithography; finger-gap ratio; gallium phosphate; high reproducibility device; high-temperature surface acoustic wave device; interdigital transducer devices; lift-off process; long-term stability; passive wireless sensor application; platinum-zirconium metallization; process monitoring; Acoustic waves; Consumer electronics; Monitoring; Platinum; Reproducibility of results; Surface acoustic wave devices; Surface acoustic waves; Temperature sensors; Transducers; Wireless sensor networks;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
DOI :
10.1109/TUFFC.2006.194
