Richard The 25A board was designed for IPC-SM-840C. It contains comb patterns from the original B25 board and for Bellcore requirements as well as a "Y" pattern. I am sure that the artwork for this board is available from IPC. To design an SIR test board we need to know what you are going to be testing. The B24 is used for flux testing. The B25 is used for solder mask and conformal coating. The B36 is used for asssembly processes. So tell us what you want to test and all of us have our own ideas regarding what should be considered in a test board. Susan Mansilla Technical Director Robisan Laboratory ################################################################ TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c ################################################################ To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TechNet <your full name> To unsubscribe: SIGNOFF TechNet ################################################################ Please visit IPC's web site (http://www.ipc.org) "On-Line Services" section for additional information. For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 ################################################################