IPC-PE-740 has some info on bakeout of bare boards, and you'll also find some support info in IPC-HDBK-001. Not extensive in either, but some recommended times/temperatures in HDBK-001 particularly. For those that aren't aware, HDBK-001 was updated extensively last year to include an excellent comparison of the B to C versions. Cordially, Jack Crawford IPC Director of Assembly Standards and Technology >>> [log in to unmask] 08/31/01 13:36 PM >>> Hello, I appreciate this source so much. I am wondering if anyone can lead me to the standard and section that deals with conditioning of bare boards before assembly for moisture retention? Does such a requirement exist? Is there somewhere in a standard that puts a limit on how long boards can be kept before conditioning is required, and how bare fabs are required to be stored? Thank you in advance. kb --------------------------------------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d 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 delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail 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 1.8d 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 delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail 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 ---------------------------------------------------------------------------------