Hi, We are using to HF to clean the SiO2 in Si substrates. I would like to prepare some organic TFTs and I have some questions: typical SiO2 layer thickness and typical conductivity of the Si substrate. How can affect these parameters to the final performance of the OTFT? Thank you very much. -- Rafael García Valverde, PhD Electronics Department - DETCP Technical University of Cartagena - UPCT Plaza del Hospital, 1 30203 Cartagena, Murcia SPAIN (0034) 868888787 / 968326514