Also, the lamination cool down rate is recommended at less than 10 degress F per minute until about 250 degrees F. Some folks use cool presses and others use the old fan on the stacks while on a shelf, depending on the through-put required of the lamination area. My 2 cents, Russ >From: Judy Brown <[log in to unmask]> >Reply-To: TechNet E-Mail Forum <[log in to unmask]>, Judy Brown ><[log in to unmask]> >To: [log in to unmask] >Subject: Re: [TN] Warp & Twist >Date: Fri, 4 Feb 2005 12:16:47 -0800 > >Thanks! > >-----Original Message----- >From: TechNet [mailto:[log in to unmask]]On Behalf Of Pete menuez >Sent: Friday, February 04, 2005 12:11 PM >To: [log in to unmask] >Subject: Re: [TN] Warp & Twist > > >Multilayers >Unbalanced layup - more copper on layers 1 - 5 than 6 - 10 (for example) >Warped caul (tooling) plates >Weave orientation >Lamination Rise time >The use of aluminum vs. steel separator plates >Odd layer count > >Doublesided >Unbalanced circuitry on side one vs.two >Material- I remember we used to purchase DS material from a laminator (no >longer in business) that always warped - I think it was 7 ply instead of a >standard 8 ply. > >Hope this helps. >pete > > > >From: Judy Brown <[log in to unmask]> > >Reply-To: TechNet E-Mail Forum <[log in to unmask]>, Judy Brown > ><[log in to unmask]> > >To: [log in to unmask] > >Subject: [TN] Warp & Twist > >Date: Fri, 4 Feb 2005 10:45:15 -0800 > > > >I know I saw what I need somewhere, but I can't remember the document. I > >need the causes for PCB warp and twist. > > > >Judy Rae Brown > >Quality Assurance Manager > >EXPRESS MANUFACTURING, INC. > >Electronic Manufacturing Services > >3519 West Warner Avenue > >Santa Ana, CA 92704 > >714.979.2228 - Tel > >714.556.0575 - Fax > >Email: [log in to unmask] > >Website: <http://www.eminc.com/> > > > > > >--------------------------------------------------- > >Technet Mail List provided as a 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/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 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/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 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/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 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/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------