(Ba, Sr)TiO3 thin film growth in a batch processing MOCVD reactor

Thin films of different compositions within the (Bax,Sr1-x)TiO3 solid solution series were deposited in a planetary multi-wafer MOCVD reactor using different solutions of Sr(thd)2, Ba(thd)2 and Ti(O-i-Pr)2(thd)2 precursors. The structural and electrical properties of Pt/BST/Pt MIM structures are presented. On the basis of a film thickness series ranging from 10 to 150 nm, the permittivity is discussed within the dead layer model. The performance of two different liquid precursor delivery systems, characterised by flash evaporation and liquid injection, respectively, are compared for different SrTiO3 films. Finally, the growth of SrTiO3 on Pt(111) is compared with that on Si(100), and the electrical characteristics of the Pt/STO/Si MIS structures are discussed. 7 refs.