Have you considered screen printed Ag pastes instead? Dupont and Ferro (for example) make a line of pastes which when fired (at around 700C) will make a solderable thick film 10-15u. You can easily print down to 200u features. -- Tom Rust Photon Energy Systems (510) 339-9636 FAX (510) 912-4662 cell http://www.photonenergysys.com