James, I just received the information on the ON Semi announcement from my boss. It was "ON Semiconductor General Announcement #15026". It contains the following: ON Semiconductor's Pb-free products are backward compatible to 210oC. Backward compatibility refers to the ability of the Pb-free products to be mounted to a PCB with solder pastes containing Pb. Backward compatibility does not extend to TO3 and TO92 products as well as Pbfree bump terminations found on Flip Chip and BGA. It is recommended that only Pb-free solder pastes and reflow profiles be used with these Pb-free products. -----Original Message----- From: James, Chris [mailto:[log in to unmask]] Sent: Friday, October 14, 2005 1:39 AM To: (Leadfree Electronics Assembly Forum); Gilbert, Doug Subject: FW: ONSEMI backward compatibility ONSEMI are not aware of any PCN to that affect: _____ From: ON Help [mailto:[log in to unmask]] Sent: 13 October 2005 19:01 To: James, Chris Subject: Re: Pb-F - Service Request #6xxxxxx Response From ON Semiconductor Service Request #63163 ON Semiconductor Technical Information Center Phone: 800-282-9855 (US & Canada), +421-337-902910 (EMEA) Web Site: http://www.onsemi.com/PowerSolutions/supportTechnical.do **************************************************************** Please do not reply to this email. Please submit any additional questions via our web site or by calling the ON Semiconductor Technical Information Center. Thank you. **************************************************************** Hello C James, Thank you for contacting ON Semiconductor. I have no information about the PCN saying that mentioned packages are not backward compatible. ON has conducted reflow tests of Pb-free parts using Pb-containing solder reflow temperatures and processes to simulate this condition. Tests have been conducted at 210 to 230?C and results show that there are no solderability issues. This does not apply to BGA, bumped die or Flip Chip devices; if the parts are Pb-free they need to use a Pb-free reflow process: http://www.onsemi.com/PowerSolutions/content.do?id=1282 <http://www.onsemi.com/PowerSolutions/content.do?id=1282> Regards, PeterG ON Semiconductor Technical Information Center Subject: Pb-F Description of customer request: Have you issued a PCN saying your Pb-free TO-3 and TO-92 packages are not backward compatible and should be used for Pb-free soldering only? _____ This message (including any attachments) may contain confidential information intended for a specific individual and purpose. If you are not the intended recipient, delete this message. If you are not the intended recipient, disclosing, copying, distributing, or taking any action based on this message is strictly prohibited. -------------------------------------------------------------------------------Leadfee Mail List provided as a service by IPC using LISTSERV 1.8d To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Leadfree To temporarily stop/(start) delivery of Leadree for vacation breaks send: SET Leadfree NOMAIL/(MAIL) Search previous postings 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 -------------------------------------------------------------------------------