The slash sheets for /26 and /99 indicate they are RoHS-compliant under the flame retardant listing. The others do not have this wording. The Tg for /99 is only 150 deg. C, as opposed to 170 minimum for /26. But the /99 lists TMA ratings and high Td, the /26 does not. -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Jendon, Terry Sent: Thursday, April 17, 2008 11:33 AM To: [log in to unmask] Subject: [TN] IPC4101B Questions I have a questions concerning IPC-4101B standard. Does anyone know (or be able to highlight) the major differences between it and the IPC-4101A standard? Also , for our PCB designs, our fabrication drawing (that we send out to the PCB design house) calls out to use any of the IPC-4101B material spec sheet #24 26, 29 and 99. However, I could verify if these sheets specs are explicitly identified as being RoHS compliant. Can anyone tell me which of those materials are indeed RoHS compliant? Thanks in advance for your help. Regards, Terry Jendon Senior Engineer LXE Inc. 125 Technology Parkway Norcross, GA 30092 --------------------------------------------------- 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 -----------------------------------------------------