Non of the document tell you how to qualify your reflow process. The first thin is to asses you ovens capability by profiling the oven and fully understand the units capability. You may find my video tape on Reflow Soldering and Temperature Profiling of value. Bob Willis Electronic Presentation Services 2 Fourth Avenue, Chelmsford, Essex CM1 4HA. England. Tel: (44) 01245 351502 Fax: (44) 01245 496123 Home Page: http://ourworld.compuserve.com/homepages/bwillis Email: [log in to unmask]