I got a customer (god bless him) who wants me to opticaly coat a glass window- no problem with that, we do that every day, but he also wants a copper busbar mounted at each end of the window. Any ideas how to attach copper to glass?

The window is about 150mm long, 100mm wide, 2mm thick and the busbar has to be 2mm wide and 0.2mm thick and it goes along both of the shorter sides.

I'm stuck! *scratches head*

[edit]Oh, the coating is conductive, so when the copper is attached to the coating it will conduct from one busbar to the other.[/edit]