Yes..of course... Franklin ----- Original Message ----- From: "James TerVeen" <[log in to unmask]> To: <[log in to unmask]> Sent: Monday, October 28, 2002 10:39 AM Subject: Re: [TN] WARPAGE > After assembly may be more critical. Many assembled boards have to mate > into a connector and if the board is warped then you may have a more > critical problem...... > > > > Franklin D Asbell > <fasbell@NETWORKCI To: [log in to unmask] > RCUITS.COM> cc: > Sent by: TechNet Subject: Re: [TN] WARPAGE > <[log in to unmask]> > > > 10/28/02 11:30 AM > Please respond to > "TechNet E-Mail > Forum."; Please > respond to > Franklin D Asbell > > > > > > > Would that criteria also apply to "populated" boards? I believe he was > seeking data for populated boards...curious...would it matter after > assembly if they were warped or not??? > > Franklin > > > ----- Original Message ----- > From: Eric Castonguay > To: [log in to unmask] > Sent: Monday, October 28, 2002 10:14 AM > Subject: Re: [TN] WARPAGE > > > > 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. 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