Josef,

we used to deal with a similar problem by scribing silicon first, then
dipping in LN2 (makes the polymer extremely brittle), and then breaking.
Not elegant, but might work for you

Mac McReynolds
Process Development Manager
Caliper Life Sciences
605 Fairchild Drive
Mountain View, CA 94043-2234
Tel:  650-623-0710
Fax:  650-623-0521




Please Join us at LabFusion 2004 "From technologies to knowledge"
June 12th - 16th in Boston
www.labautomation.org/LF/LF04/index.htm
and join us for a special Caliper evening Monday June 14th!