Well, This is a situation where I cannot say the class would be -1 squared. Ioan Tempea, ing. Ingénieur Principal de Fabrication / Senior Manufacturing Engineer T | 450.967.7100 ext.244 E | [log in to unmask] W | www.digico.cc N'imprimer que si nécessaire - Print only if you must -----Message d'origine----- De : Ken Bloomquist [mailto:[log in to unmask]] Envoyé : Thursday, November 19, 2009 10:54 AM À : [log in to unmask] Objet : Re: [TN] Discussion on the reliability of single-sided PCB & PCBA Hi Werner, I was unaware that IPC had sub-classes. If this material is "-1" then what would it be if soldered with lead-free solder? KennyB -----Original Message----- From: Werner Engelmaier [mailto:[log in to unmask]] Sent: Thursday, November 19, 2009 8:00 AM To: [log in to unmask] Subject: Re: [TN] Discussion on the reliability of single-sided PCB & PCBA Hi Charming, What you have is a PCB made of CEM-1 or -2 with unsupported holes---this is Class -1(minus 1) not Class 2. While this might work for some applications, you cannot claim that you have a Class 2 product; and in harsh environments you clearly will have problems. Werner ------------------ --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 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 15.0 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 -----------------------------------------------------