Hi, Does anyone know of an etchant that will attack my oxide sacrificial layer but not the nitride or aluminum. I have tried straight HF and it seems to work quite alright but I am looking for a better solution. It has to be a wet etchant. Thanks in advance. Regards Yan ________________________________________________________________________ Yan Loke Institute of Microelectronics e-mail : yloke@carerras.ime.gov.sg Block 85 Science Park Drive Phone : 870-9433 The Cavendish #01-02 Fax : 779-3711 Singapore 0511