Hi Snow, This problem was caused by PCB producing process. Thanks and best regards, Justin Wu Utilux South China Ltd Phone: +86-755-2850 7521 Fax: +86-755-2850 0927 E-mail Address: [log in to unmask] _____ From: [log in to unmask] [mailto:[log in to unmask]] Sent: Wednesday, April 13, 2011 1:40 PM To: [log in to unmask]; [log in to unmask] Subject: RE: [TGAsia] Solder Ball Hi, Justin, More question for clearly understand the nonconforming. What¡¦s the process caused the solder ball? Is it come from PCB producing process? Or is it come from PCBA SMT process / wave process? Best Regards Snow Fu _____ From: TGAsia [mailto:[log in to unmask]] On Behalf Of Justin Wu Sent: 2011¦~4¤ë13¤é 12:09 To: [log in to unmask] Subject: Re: [TGAsia] Solder Ball Hi All, We have found some solder balls inside TH on the PCB (See below photo), however there is no exact matching of the defect mentioned in IPC, but according to IPC-A-610 Clause 5.2.7.1, the solder ball is accepted if it is embedded in the solder resist. So, would you please share your experience in such case with me? Thanks in advance! Best regards, Justin Wu Utilux South China Ltd Phone: +86-755-2850 7521 Fax: +86-755-2850 0927 E-mail Address: [log in to unmask] __________ Information from ESET NOD32 Antivirus, version of virus signature database 6037 (20110412) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ __________ Information from ESET NOD32 Antivirus, version of virus signature database 6037 (20110412) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________