Stella, IPC-A-610B, Paragraph 4.1, defines as a nonconforming defect for all classes: Solder balls/splashes violate minimum electrical design clearance, or are not entrapped in a permanent coating or attached to a metal contact. Nonconforming process indicators for all classes are: - Solder balls/splashes which are within 0.13mm of lands or traces, or exceed 0.13mm in diameter. - More than five (5) solder balls/splashes (0.13mm or less) per 600 mm2. Note: Entrapped is intended to mean normal service environment of the product will not cause a solder ball to become dislodged. Hope this helps. Mary Muller Materials and Processes ELDEC Corp. Lynnwood, WA > ---------- > From: [log in to unmask][SMTP:[log in to unmask]] > Reply To: TechNet E-Mail Forum.;[log in to unmask] > Sent: Thursday, February 26, 1998 12:50 PM > To: [log in to unmask] > Subject: [TN] Solder balls spec > > 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 ################################################################