When I was still building boards in the early 80's I instituted the following serialization scheme. We would image a series of "8's" like a calculator screen onto either the circuitry or nomenclature artwork. The phototool operator then covered up the appropriate section of the "8's" pattern with tape or pen, and then proceeded to image the "lotcode" onto the panels. __ __ I__I I__I I__I I__I To __ __ I__ I__ I__I __I Bob Neves Director of Technical Services MICROTEK LABORATORIES [log in to unmask]