You have a rather tall joint with a relatively heavy part. SMT glue does not have very much shear strength either. Additionally, your CTEs of pcb and part body are somewhat mismatched. Without knowing more specifics, there may be other things going on too. -----Original Message----- From: Lon Weffers [mailto:[log in to unmask]] Sent: Thursday, June 21, 2001 8:50 AM To: [log in to unmask] Subject: [TN] FW: dispensing glue Dear technetters, One of my colleges has a problem with glueing a plcc on the solderside of the pcb. They glue with a Hereaus glue and when they check the joint directly after the oven it is stuck. When the pcb's are cooled down the component falls of the board. The glue spot is on the board. What causes this problem?? Lon Weffers Matas Electronics bv www.matas.nl ---------------------------------------------------------------------------- ----- 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 ---------------------------------------------------------------------------------