We're working on a biomems application where we are relying on the high electrical resistance of polyimde in an ionic aqueous environment (1M KCl). We have found though that the bulk resistivity of PI-2611 in this solution is only 8.3 x 10^11 Ohm-cm vs. the published value from HD Microsystems of >10^16 Ohm- cm! We see a similar affect on parylene . Can anyone comment? Have you seen this before? Thanks in advance, Michael Martin U. of Louisville