ANSI/J-STD-001B mentions solderballs in two places: 8.3.1 Particulate Matter Assemblies shall be free of dirt, lint, solder splash, dross, wire clippings, etc. Solder balls must neither be loose nor violate minimum electrical spacing. Table 11-1, Item 16 Violation of minimum electrical spacing. This condition includes potential movement of conductors (including conductive part bodies, leads, wires, etc.) solder balls, excessive solder and bridging. Hope this helps. Jack Jack Crawford, IPC Project Manger - Assembly 2215 Sanders Road, Northbrook IL 60062-6135 [log in to unmask] http://www.ipc.org 847-509-9700 x 393 fax 847-509-9798 >>> <[log in to unmask]> 02/26/98 02:50PM >>> Dear colleagues: Sorry, but I have to return to the solder balls spec. issue. I know, that IPC-S-815B ( 3.6.6) had the criteria for the solder balls ( less than 0.005", no more than 5 per one sq. inch). Now, IPC-S-815 was replaced by J-STD-001. But , I can not find any solder balls spec in J -STD. We are NoClean chemistry users, and will always have tiny solder balls, although we are trying to reduce its number. I need an official document to accept presence of the solder balls up to the certain level, of course. Please, help!! Stella Neyman Eaton Co. 248-608-7289 E-mail: [log in to unmask] ################################################################ 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 the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311 ################################################################ ################################################################ 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 the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311 ################################################################