Dr. Warren, The word should have a space like this. Kou tasou PBGA. Kou(high, many) tasou(many, high layers). Here "kou" functions as adjective of "tasou". So Japanese know this is many layers with more/high thickness/height. Hope this helps. Regards, Ron Hayashi ################################################################ 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 ################################################################