I have a microchannel etched on a quartz substrate ..the chip size is 1cm x 3cm with gold layer on it which was a masking layer during the glass etch.For the capping wafer I am using a microscope glass slide. At present I use epoxy at the edges to bond the glass slide to the chip.There is no leakage out of the channel this way.But at the interface i.e at area of contact between the surface of the chip and the top slide some liquid seeps in.Is there any simple solution to prevent this ? --------------------------------- Do you Yahoo!? SBC Yahoo! DSL - Now only $29.95 per month!