Dear all: I am now doing an experiment which need to etch the silicon without attacking Al. The alkaline etchants that we usually adopted in MEMS, TMAH and KOH, could not satisfy the requirement. I heard that some organic material can do this job, can anyone here provide me the information? Or advise me other effective solutions? Anything you provided will be highly appreciated! Thanks Daniel ************************************************************ Daniel Xu (Xu zhengyi) ------------------------------------------------------------ Ph.D candidate State Key Laboratories of Transducer Technology Shanghai Institute of Microsystem & Information Technology Chinese Academy of Sciences 865 Changning Road Shanghai 200050 China ------------------------------------------------------------ Tel: 86-21-62511070 ext. 8607 FAX: 86-21-62513510 email:xzy@mail.sim.ac.cn ************************************************************