Hi, I found this description www.virginiasemi.com/pdf/siliconetchingandcleaning.pdf But I never checked the results. Maria -----Original Message----- From: mems-talk-bounces@memsnet.org [mailto:mems-talk-bounces@memsnet.org] On Behalf Of Andrea Mazzolari Sent: 24. januar 2010 17:59 To: "General MEMS discussion"@fe.infn.it; ""@fe.infn.it Subject: [mems-talk] KOH+IPA Hi All, i need to realize (110) oriented vertical sidewalls in (110) silicon wafers. I've found that addition of IPA to KOH changes the etch rates and should provide this result. I do not have any information on the needed IPA quantity to be addeded to the solution. Any suggestion, please ? Thanks, Andrea