What are the problems with running the soldermask to the edge of the printed wiring board and non-plated holes? We have been keeping it away by 50 mils but you see alot of commercial boards with it to the edge. Does it depend on board material? Does it depend on whether it is commercial versus military? Does it depend on dry versus liquid soldermask? Any ideas would be appreciated. Larry L. Pucket Dept. 9784 MS0624 Sandia National Laboratories P.O. Box 5800 Albuquerque, NM 87185-0624 Phone: (505)844-1711 Fax: (505)844-7428 Email: [log in to unmask]