Jim, I am used to the .01"/inch myself in the TH world. We are just beginning to get into the SM world and I thought I had seen a much tighter tolerance when one is talking about SM. I have ordered the IPC specs, but they have not arrived yet. Can you confirm to me that the .01"/inch is valid in SM also? Thank you sir. Richard Hamilton Clemar Mfg. / Rain Bird [log in to unmask] > -----Original Message----- > From: Jim Mathis [SMTP:[log in to unmask]] > Sent: Wednesday, February 18, 1998 2:27 PM > To: [log in to unmask] > Subject: Re: [TN] PCB warpage > > I spec'd out .01"/inch, also, which used to be the spec. IPC-275 > section > 5.2.5.2 now specs Bow & Twist in terms of percentages. If you don't > have a > copy of IPC-275, let me know and I'll fax you the appropriate pages. > ################################################################ TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c ################################################################ To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TechNet <your full name> To unsubscribe: SIGNOFF TechNet ################################################################ Please visit IPC web site (http://jefry.ipc.org/forum.htm) for additional information. For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311 ################################################################