Pankaj, check in IPC-6012 par. 3.4.4 Bow & Twist. The printed board shall have a maximum bow & twist of 0.75% for boards that use SM components and 1.5% for all other boards. Also, see test method 2.4.22 described in the "IPC-TM-650 test methods manual" on how to measure it. Eric Castonguay, Eng. Manufacturing Engineering www.Hyperchip.com Montreal, Canada T. 514 906 2409 F. 514 906 2501 -----Original Message----- From: Karnwal, Pankaj [mailto:[log in to unmask]] Sent: Monday, October 28, 2002 02:02 To: [log in to unmask] Subject: [TN] WARPAGE > Hi TechNet > > Can any body give me the acceptable range of PCB {Populated } For > Warpage, { Both Throughole And SMD And MIX components} .And how we can > measure it. Also tell that what IPC states about this. > > > With regards > Pankaj Karnwal > Quality Assurance Ext. 211 > BESL A-4,Sec-5 NOIDA , 201301, INDIA > e mail : <mailto:[log in to unmask]> > Barco, innovators in image processing > > > - - - - - - - - DISCLAIMER - - - - - - - - Unless indicated otherwise, the information contained in this message is privileged and confidential, and is intended only for the use of the addressee(s) named above and others who have been specifically authorized to receive it. If you are not the intended recipient, you are hereby notified that any dissemination, distribution or copying of this message and/or attachments is strictly prohibited. The company accepts no liability for any damage caused by any virus transmitted by this email. Furthermore, the company does not warrant a proper and complete transmission of this information, nor does it accept liability for any delays. If you have received this message in error, please contact the sender and delete the message. Thank you. --------------------------------------------------- Technet Mail List provided as a free 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/html/forum.htm for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a free 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/html/forum.htm for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 -----------------------------------------------------