Fellow Technetters, I am fairly new to the world of BGAs and we have only built limited quantities of CCAs with BGAs (388s and 352s on 17 layer PWBs) for internal customers. I am seeing a first time yield of approximately 96%. Is this particularly bad for a low to mid volume environment? What kinds of FTY are other folks achieving? Thanks in advance, Ernst Wallisch Manufacturing Engineering Computing Devices Canada [log in to unmask] (613) 596-7536 ################################################################ 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 web site (http://jefry.ipc.org/forum.htm) for additional information. For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 ################################################################