The testing that we have done with RPP does not have demarcation lines - the reverse pulse just creates a slight de-plate current to level out surface to hole ratios. All of our testing show a continuous copper layer, but we have only tested a few sample types. I know that a variety of rectifiers exist for RPP and possible this is the difference - or malfunction of a unit/flight bar connection. Jeffrey Bush Director, Quality Assurance and Technical Support 76 Technology Drive - POB 1890 Brattleboro, Vermont 05302-1890 Tel. 802.257.4571.21 Fax. 802.257.0011 [log in to unmask] http://www.vtcircuits.com -----Original Message----- From: Susan Mansilla [mailto:[log in to unmask]] Sent: Friday, October 01, 2004 11:51 AM To: [log in to unmask] Subject: [TN] Pulse Plating Greetings everyone, I have two customers, both of whom use pulse plating to fabricate boards. One has a continuous copper deposit and the other has multiple bands or layers of plating - very visible after microetch. The plating deposit on the banded product has cracks after Thermal Stress. In my limited experience I have not seen pulse plating result in such definite bands. My question is - would bands be expected and "normal" in some pulse plating operations? Thanks for your help Susan Mansilla Robisan Lab --------------------------------------------------- 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 847-509-9700 ext.5315 ----------------------------------------------------- --------------------------------------------------- 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 847-509-9700 ext.5315 -----------------------------------------------------