Dear all, I want to know that, how I can use slit to conductor isolation for high Voltages. I know the formula about conductor clearance (from IPC-D-330), if I use slits, would these clearances be decrease? How can we formulate the relationship between slits and electrical conductor clearances ? Thanks in advance Ceyiz Tekcan VESTEL R&D PCB Design Engineer E-mail:[log in to unmask] Phone:+90 236 233 01 31 Ext:2111 Fax:+90 236 233 38 68