Thanks Zreik Anan Technology Manager PCB P.O.B 631 Migdal Haemek 23105 Tel : 972-46544300 Ext -267 Mobile : 972-577675569 -----Original Message----- From: TechNet [mailto:[log in to unmask]]On Behalf Of Jim Jablonsky Sent: Thursday, September 01, 2005 6:41 PM To: [log in to unmask] Subject: Re: [TN] chocolate plating Hi, In my past I seen similar results caused by lack of current to specific boards, or areas caused by oxidized buss bars or improper connectivity on the board them selves. Sometime just cleaning your buss bars on a daily basis will prevent the majority of your problems. Check with a simple continuity meter circuits on boards to see if there are any opens. Best of Luck Jim Jablonsky -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Anan Sent: Thursday, September 01, 2005 12:10 PM To: [log in to unmask] Subject: Re: [TN] chocolate plating Hi : the amazing that not all the board have this chocolate copper , some times maybe just little area in the board have the chocolate cooper and the other areas in the board OK ,also not all the panels in the batch that was in the tank have a chocolate copper . the hull-cells is OK . the anode film look OK Zreik Anan Technology Manager PCB P.O.B 631 Migdal Haemek 23105 Tel : 972-46544300 Ext -267 Mobile : 972-577675569 -----Original Message----- From: TechNet [mailto:[log in to unmask]]On Behalf Of Dennis Fritz Sent: Thursday, September 01, 2005 5:10 PM To: [log in to unmask] Subject: Re: [TN] chocolate plating Good suggestion from George Milad. Copper plates well to copper, but not well to copper oxide. Is this chocolate all over the boards, or in patches? You may want to check for impurities now in the bath. Organics usually show on hull cells - have you run that on the bath? Inorganic contaminants cause the following problems (From IPC 740 trouble shooting guide, chapter 10) What does the anode film look like - may be a way a clue to what is happening on the boards? --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------