1. Use EDG 2. laser ablation Looking for your positive feedback. Thanks & Regards Bhupesh Bishnoi Indian Institute of Technology Madras On Tue, Nov 16, 2010 at 11:15 AM, abhaya joshiwrote: > There can be two problems; as i suspect. > > 1) Your oxide layer is not completly removed. so your Cr is not going in Cr > etchant. > > 2) Or u might be using KI based gold etchant.which will not affect the Cr, > but HNO3+HCl based gold etchant (Aqua regia) will etch Cr very fast.But be > careful for underetching. > > How you are depositing top oxide layer? > > Best Luck > > -abhay Joshi