Thanks to everyone for sharing. What about Bow & Twist on Post reliability testing, T/C? Does the 1.5% still applied for SMT/PTH assemblies? The assembly is nearly a square form factor. Victor, -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of ALLEN, LOA Sent: Friday, July 10, 2009 3:31 PM To: [log in to unmask] Subject: Re: [TN] Maximum Allowable Bow & Twist for PWB-PCB Ref IPC-A-610D, pg 10-15, section 10.2.7 Acceptable - Class 1,2,3 Bow an twist does not cause damage during post solder assembly operation or end use. Consider "Form, Fit and Function" and product reliability. Note: Bow and twist after solder should not exceed 1.5% for through-hole and 0.75% for surface mount printed board applications -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Victor Hernandez Sent: Friday, July 10, 2009 1:15 PM To: [log in to unmask] Subject: [TN] Maximum Allowable Bow & Twist for PWB-PCB What is the maximum allowable Bow & Twist value? Not able to locate in IPC-2221, 2222, & 6012A Victor, --------------------------------------------------- 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 ----------------------------------------------------- --------------------------------------------------- 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 -----------------------------------------------------