Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
Room temperature sputtering of inclined c-axis ZnO for shear mode solidly mounted resonators
Year:2016
Research Areas
  • Electronic technology and of the communications
Information
Abstract
ZnO films with a c-axis significantly inclined away from the surface normal were grown by a remote plasma sputtering technique at room temperature. The films were used to make solidly mounted resonators (SMRs) operating in shear mode at a resonant frequency of 1.35 GHz. Control of the ZnO microstructure was achieved using a polycrystalline AlN seed layer which can be added on top of a sputtered acoustic mirror to give a complete SMR device. The ZnO was reactively sputtered in an atmosphere of argon and oxygen from a zinc target. The c-axis of the ZnO was estimated to be at an angle of ?45° to the surface normal. SMRs were measured to have quality factors (Q) of up to 140 and effective electromechanical coupling coefficients of up to 2.2% in air. Although an inclined c-axis can be achieved with direct growth onto the acoustic mirror, it is shown that the AlN seed layer provides higher coupling coefficients and narrower inclination angular distribution. The responses of the devices in liquids of different viscosities (acetone, water, and AZ5214E photoresist) were measured. The shear mode Q decreased by 45% in acetone, 72% in water, and 92% in AZ5214E.
International
Si
JCR
Si
Title
Applied Physics Letters
ISBN
0003-6951
Impact factor JCR
3,515
Impact info
Datos JCR del año 2013
Volume
108
Journal number
From page
034103
To page
034103-5
Month
SIN MES
Ranking
Participants
  • Autor: Girish Rughoobur (University of Cambridge (UK))
  • Autor: Mario De Miguel Ramos (UPM)
  • Autor: Teona Mirea (UPM)
  • Autor: Marta Clement Lorenzo (UPM)
  • Autor: Jimena Olivares Roza (UPM)
  • Autor: Barbara Diaz Duran (UPM)
  • Autor: Jesus Sangrador Garcia (UPM)
  • Autor: Isabella Miele (University of Cambridge (UK))
  • Autor: W.I. Milne (University of Cambridge (UK))
  • Autor: Enrique Iborra Grau (UPM)
  • Autor: Andrew J. Flewitt (University of Cambridge (UK))
Research Group, Departaments and Institutes related
  • Creador: Centro o Instituto I+D+i: Centro de Materiales y Dispositivos Avanzados para Tecnologías de Información y Comunicaciones
S2i 2019 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)