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The very first task of the project is to share between all the partners the quantified objectives of the project and to define the operation conditions the system to develop will face. Quantitative values of measurement accuracy, repeatability, system reliability and life time will be set for the different end-users demonstrations. In parallel with these definitions (WP1: all partners), all information concerning available material capable to operate in the focused temperature range are collected and if required measured to provide a comprehensive description of the material properties (WP2: TUC, FOMOS, IMTRAS). The same operation is achieved for electrode material which must operate uniformly on the whole working range and on long term (WP2: ALU, CTR, TUC, FOMOS, IMTRAS). First wafers are available to achieve the corresponding tests and to prepare new WPs (WP2:IPV, FOMOS, CNRS). These data are used to design the sensor (WP3: CNRS, CTR, GVR, SENSEOR IMTRAS). According to the selected operating points, optimal material cuts have to be identified by systematic computation of SAW properties versus crystal angles and the propagation direction, using the corresponding models available within the consortium. For the selected crystal orientations, a set of parameters indicating the efficiency of SAW excitation, detection, propagation and diffraction will be computed accounting for the acoustic contribution of electrodes, yielding a SAW parameter grid. This latter is used in mixed-matrix or COM models to simulate the whole SAW devices (resonators, delay-lines, others) and optimisation process are developed to provide the best design according to the system specification. The chosen material and oriented wafers are manufactured as soon as selected in the above analysis process and before the end of the SAW design (WP3: FOMOS). Once this work is achieved, the two first technical milestones – Materials (M2) and Design (M3) – will be successfully reached. The success indicator is a sufficient number of wafers (not less than 25 for each selected crystal orientation) produced and delivered to the partners and the availability of a pertinent set of material characteristics, identification of optimum cuts, availability of resonator and delay-line designs with a theoretical evaluation of the design sensitivity to technological parameters and electrical environment. The corresponding deliverables are transmitted to FOMOS to report to Russia administration.
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